Jinping Zhao, Shixiong Gao, Zihan Feng, Junliang Liu, Yuefang Zhang, Wenxiang Wu, Zinan Zhang, Jiaheng Qin, Kun Liang, Yu Long
Fe2O3-200 prepared by facile precipitation method could active both H2 and stoichiometric N2H4·H2O to reduce nitrobenzene forming aniline. Fe2O3-200 could efficent adsorb and active nitro group, promoting hydrogenation of nitroarenes. Notably, the decomposed of N2H4·H2O rely on the presence of nitro group. Moreover, Fe2O3-200 exhibits good stability and universality.
{"title":"Bifunctional Fe2O3 catalyst for hydrogenation and transfer hydrogenation of nitroarenes","authors":"Jinping Zhao, Shixiong Gao, Zihan Feng, Junliang Liu, Yuefang Zhang, Wenxiang Wu, Zinan Zhang, Jiaheng Qin, Kun Liang, Yu Long","doi":"10.1039/d4qm00605d","DOIUrl":"https://doi.org/10.1039/d4qm00605d","url":null,"abstract":"Fe<small><sub>2</sub></small>O<small><sub>3</sub></small>-200 prepared by facile precipitation method could active both H<small><sub>2</sub></small> and stoichiometric N<small><sub>2</sub></small>H<small><sub>4</sub></small>·H<small><sub>2</sub></small>O to reduce nitrobenzene forming aniline. Fe<small><sub>2</sub></small>O<small><sub>3</sub></small>-200 could efficent adsorb and active nitro group, promoting hydrogenation of nitroarenes. Notably, the decomposed of N<small><sub>2</sub></small>H<small><sub>4</sub></small>·H<small><sub>2</sub></small>O rely on the presence of nitro group. Moreover, Fe<small><sub>2</sub></small>O<small><sub>3</sub></small>-200 exhibits good stability and universality.","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":null,"pages":null},"PeriodicalIF":7.0,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142249120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
He Huang, Xiaobo Zhang, Wencai Zhou, Yong Huang, Zilong Zheng, Xiaoqing Chen, Yongzhe Zhang, Hui Yan
The performance of perovskite solar cells (PSCs) is critically influenced by the quality of interfaces, including grain boundaries and perovskite surfaces. These interfaces are often highly defective, leading to non-radiative recombination and impaired charge transfer. Additionally, operational conditions can induce undesirable chemical reactions, affecting long-term stability. This review summarizes advancements over the past five years in achieving high-efficiency (near or above 25%) through interface passivation. Notably, using two-dimensional/three-dimensional (2D/3D) hybrid perovskites, which combine the stability of 2D perovskites with the efficiency of 3D perovskites, has emerged as a promising strategy. We reviewed recent progress in interface passivation strategies, focusing on the implementation of 2D/3D perovskite passivation across buried interfaces, grain boundaries and top interfaces. Finally, we discussed challenges and future directions for multi-interface cooperative passivation, charge dynamics and degradation mechanisms.
{"title":"Interface passivation strategies for high-performance perovskite solar cells using two-dimensional perovskites","authors":"He Huang, Xiaobo Zhang, Wencai Zhou, Yong Huang, Zilong Zheng, Xiaoqing Chen, Yongzhe Zhang, Hui Yan","doi":"10.1039/d4qm00560k","DOIUrl":"https://doi.org/10.1039/d4qm00560k","url":null,"abstract":"The performance of perovskite solar cells (PSCs) is critically influenced by the quality of interfaces, including grain boundaries and perovskite surfaces. These interfaces are often highly defective, leading to non-radiative recombination and impaired charge transfer. Additionally, operational conditions can induce undesirable chemical reactions, affecting long-term stability. This review summarizes advancements over the past five years in achieving high-efficiency (near or above 25%) through interface passivation. Notably, using two-dimensional/three-dimensional (2D/3D) hybrid perovskites, which combine the stability of 2D perovskites with the efficiency of 3D perovskites, has emerged as a promising strategy. We reviewed recent progress in interface passivation strategies, focusing on the implementation of 2D/3D perovskite passivation across buried interfaces, grain boundaries and top interfaces. Finally, we discussed challenges and future directions for multi-interface cooperative passivation, charge dynamics and degradation mechanisms.","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":null,"pages":null},"PeriodicalIF":7.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142249123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Recently, two-dimensional (2D) organic-inorganic hybrid per-ovskites (OIHPs) have gar-nered significant interest of optics and optoelectronics. Presently, the “perovskitizer” moieties in the perovskite cage are confined exclusively to small-size cations (such as Cs+ and CH3NH3+), while high-quality crystals of 2D OIHPs containing larger cation (e.g., guanidinium, G+) cation as perovskitizer remain quite scarce for detecting X-ray application. Here, we have successfully fabricated nanoGray-responsive self-driven X-ray detector using single crystals of a polar 2D hybrid perovskite, IA2GPb2I7 (where IA is isoamylammoni-um), of which G cations are confined inside the perovskite cages. The dynamic freedom of IA+ and G+ organic cations' molecular movements sup-plies the impetus for the crea-tion of electrical polarization. Upon X-ray radiation, a bulk photovoltaic voltage of 0.74 V is generated due to the spon-taneous electric polarization, which affords the source for self-driven detection. The grown high-quality inch-size crystals show high resistivity (1.82 × 1010 Ω cm) and huge carrier migration lifetime product (μτ = 2.7×10-3 cm-2 V-1). As expected, X-ray detector fabricated on high-quality crystal enables dramatic X-ray detection performances un-der 0 V, boasting an excellent sensitivity of 115.43 μC Gyair−1 cm−2 and an impressively low detection limit of 9.6 nGyair s−1. The detection limit is superior to many known perovskite X-ray detectors. The investiga-tion focuses on the rational design and engineering of new hybrid perovskites to-ward high-demanded self-powered X-ray detector.
最近，二维（2D）有机-无机杂化包晶（OIHPs）在光学和光电子学领域引起了极大的兴趣。目前，包晶石笼中的 "包晶石 "分子仅限于小尺寸阳离子（如 Cs+ 和 CH3NH3+），而含有较大阳离子（如胍，G+）作为包晶石的二维有机无机杂化包晶石的高质量晶体在探测 X 射线应用方面仍然相当稀缺。在这里，我们利用极性二维杂化包晶--IA2GPb2I7（其中 IA 为异戊基铵）单晶成功制备了纳米灰色响应自驱动 X 射线探测器，其中 G 阳离子被限制在包晶笼子内。IA+ 和 G+ 有机阳离子分子运动的动态自由度为电极化的产生提供了动力。在 X 射线照射下，自发的电极化产生了 0.74 V 的体光伏电压，为自驱动探测提供了源泉。生长出的高质量英寸大小晶体显示出高电阻率（1.82 × 1010 Ω cm）和巨大的载流子迁移寿命积（μτ = 2.7×10-3 cm-2 V-1）。正如预期的那样，在高质量晶体上制造的 X 射线探测器能够在 0 V 以下实现显著的 X 射线探测性能，具有 115.43 μC Gyair-1 cm-2 的出色灵敏度和 9.6 nGyair s-1 的超低探测极限。探测极限优于许多已知的过氧化物 X 射线探测器。这项研究的重点是合理设计和制造新型混合包晶，以实现高要求的自供电 X 射线探测器。
{"title":"Polar Multi-layered Two-Dimensional Hybrid Perovskite for Self-driven X-ray Photodetection with Low Detection Limit","authors":"Jingtian Zhang, Wuqian Guo, Haojie Xu, Qingshun Fan, Linjie Wei, Xianmei Zhao, Zhihua Sun, Junhua Luo","doi":"10.1039/d4qm00582a","DOIUrl":"https://doi.org/10.1039/d4qm00582a","url":null,"abstract":"Recently, two-dimensional (2D) organic-inorganic hybrid per-ovskites (OIHPs) have gar-nered significant interest of optics and optoelectronics. Presently, the “perovskitizer” moieties in the perovskite cage are confined exclusively to small-size cations (such as Cs+ and CH3NH3+), while high-quality crystals of 2D OIHPs containing larger cation (e.g., guanidinium, G+) cation as perovskitizer remain quite scarce for detecting X-ray application. Here, we have successfully fabricated nanoGray-responsive self-driven X-ray detector using single crystals of a polar 2D hybrid perovskite, IA2GPb2I7 (where IA is isoamylammoni-um), of which G cations are confined inside the perovskite cages. The dynamic freedom of IA+ and G+ organic cations' molecular movements sup-plies the impetus for the crea-tion of electrical polarization. Upon X-ray radiation, a bulk photovoltaic voltage of 0.74 V is generated due to the spon-taneous electric polarization, which affords the source for self-driven detection. The grown high-quality inch-size crystals show high resistivity (1.82 × 1010 Ω cm) and huge carrier migration lifetime product (μτ = 2.7×10-3 cm-2 V-1). As expected, X-ray detector fabricated on high-quality crystal enables dramatic X-ray detection performances un-der 0 V, boasting an excellent sensitivity of 115.43 μC Gyair−1 cm−2 and an impressively low detection limit of 9.6 nGyair s−1. The detection limit is superior to many known perovskite X-ray detectors. The investiga-tion focuses on the rational design and engineering of new hybrid perovskites to-ward high-demanded self-powered X-ray detector.","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":null,"pages":null},"PeriodicalIF":7.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142249121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yang Bai, Guoqing Feng, Qingbin Yang, Tingting Hua, Bowen Li, Hao-Lin Guo, Yuan Liu, Qing Yuan, Niansong Qian, Bin Zheng
The synergistic therapeutic strategy of combining gene delivery and photothermal effects as an efficient cancer treatment method has garnered significant attention. Here, we developed a core–shell theragnostic platform ((WO + ICG)@PLGA@PL) capable of simultaneously delivering a fluorescent imaging agent, a photothermal agent, and genes. The self-assembled platform comprises four components: indocyanine green (ICG) for in vivo localization tracking, W18O49 (WO) nanoparticles for photothermal therapy, PLGA as a core for encapsulating ICG and WO, and positive liposomes for DNA interaction and particle stabilization. The results showed that (WO + ICG)@PLGA@PL could not only achieve a synergistic therapy effect of gene delivery and photothermal effect, but also effectively inhibit tumor growth in vivo. Additionally, the (WO + ICG)@PLGA@PL nanocomplex could be a promising tool for next-generation combined gene and photothermal therapy.
作为一种高效的癌症治疗方法，基因递送与光热效应相结合的协同治疗策略备受关注。在这里，我们开发了一种核壳热敏平台（（WO + ICG）@PLGA@PL），能够同时递送荧光成像剂、光热剂和基因。该自组装平台由四部分组成：用于体内定位追踪的吲哚菁绿（ICG）、用于光热疗法的 W18O49（WO）纳米颗粒、作为封装 ICG 和 WO 核心的 PLGA 以及用于 DNA 相互作用和颗粒稳定的正脂质体。结果表明，（WO + ICG）@PLGA@PL 不仅能实现基因递送和光热效应的协同治疗效果，还能有效抑制体内肿瘤的生长。此外，(WO + ICG)@PLGA@PL纳米复合物有望成为下一代基因与光热联合治疗的工具。
{"title":"(WO + ICG)@PLGA@lipid/plasmid DNA nanocomplexes as core–shell vectors for synergistic genetic/photothermal therapy","authors":"Yang Bai, Guoqing Feng, Qingbin Yang, Tingting Hua, Bowen Li, Hao-Lin Guo, Yuan Liu, Qing Yuan, Niansong Qian, Bin Zheng","doi":"10.1039/d4qm00330f","DOIUrl":"https://doi.org/10.1039/d4qm00330f","url":null,"abstract":"The synergistic therapeutic strategy of combining gene delivery and photothermal effects as an efficient cancer treatment method has garnered significant attention. Here, we developed a core–shell theragnostic platform ((WO + ICG)@PLGA@PL) capable of simultaneously delivering a fluorescent imaging agent, a photothermal agent, and genes. The self-assembled platform comprises four components: indocyanine green (ICG) for <em>in vivo</em> localization tracking, W<small><sub>18</sub></small>O<small><sub>49</sub></small> (WO) nanoparticles for photothermal therapy, PLGA as a core for encapsulating ICG and WO, and positive liposomes for DNA interaction and particle stabilization. The results showed that (WO + ICG)@PLGA@PL could not only achieve a synergistic therapy effect of gene delivery and photothermal effect, but also effectively inhibit tumor growth <em>in vivo</em>. Additionally, the (WO + ICG)@PLGA@PL nanocomplex could be a promising tool for next-generation combined gene and photothermal therapy.","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":null,"pages":null},"PeriodicalIF":7.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142249122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Chemical debridement constitutes a pivotal phase in eradicating microbial entities during endodontic therapy. The antimicrobial efficacy of endodontic irrigants in clinical use is contingent upon their concentration; however, elevated concentrations engender significant risk to tissue integrity. Consequently, we advocate for an innovative and benign sonodynamic antimicrobial approach. This method employs the sonosensitizer DPA-SCP, which, under the influence of low-frequency ultrasonic waves, catalyzes the generation of copious reactive oxygen species (ROS). Empirical evaluations indicate that DPA-SCP demonstrates a robust antibacterial capacity towards E. faecalis suspensions and biofilms established on the internal surfaces of root canals. Moreover, its bactericidal impact is comparable to the use of 5.25% sodium hypochlorite. Moreover, DPA-SCP demonstrates markedly reduced cytotoxicity towards fibroblasts relative to conventional endodontic irrigants, and the thermal elevation induced by ultrasonic application remains within non-detrimental limits. This sonodynamic disinfection paradigm presents a valuable and prospective clinical application in endodontic sanitation.
{"title":"Highly Effective DPA-SCP Sonosensitizer for Biofilm Removal in Infected Root Canals via Sonodynamic Therapy","authors":"Ziheng Zhang, Yuhan Wan, Jiafei Qu, Dan Ding, Minghui Wang, Xin Yue, Jingrui Xin, Jing Shen","doi":"10.1039/d4qm00408f","DOIUrl":"https://doi.org/10.1039/d4qm00408f","url":null,"abstract":"Chemical debridement constitutes a pivotal phase in eradicating microbial entities during endodontic therapy. The antimicrobial efficacy of endodontic irrigants in clinical use is contingent upon their concentration; however, elevated concentrations engender significant risk to tissue integrity. Consequently, we advocate for an innovative and benign sonodynamic antimicrobial approach. This method employs the sonosensitizer DPA-SCP, which, under the influence of low-frequency ultrasonic waves, catalyzes the generation of copious reactive oxygen species (ROS). Empirical evaluations indicate that DPA-SCP demonstrates a robust antibacterial capacity towards E. faecalis suspensions and biofilms established on the internal surfaces of root canals. Moreover, its bactericidal impact is comparable to the use of 5.25% sodium hypochlorite. Moreover, DPA-SCP demonstrates markedly reduced cytotoxicity towards fibroblasts relative to conventional endodontic irrigants, and the thermal elevation induced by ultrasonic application remains within non-detrimental limits. This sonodynamic disinfection paradigm presents a valuable and prospective clinical application in endodontic sanitation.","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":null,"pages":null},"PeriodicalIF":7.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142249124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
High-quality and brilliant structural colors have been successfully produced using vacuum-based deposition and patterning technology in recent decades. Nevertheless, the major obstacles of high production costs and limited scalability impede the commercialization of these vibrant color products. Solution-processed structural colors, on the other hand, are renowned for their cost-effectiveness, scalability, and versatility. In this review, we provide an overview of prevalent solution-based techniques for structural color synthesis, along with their potential applications. Emphasizing the versatility of solution-processed structural colors, we discuss their capabilities in both color tuning and new ways of modifying refractive indices of dielectrics.
{"title":"Solution-processed structural colors and their applications","authors":"Wei-Jie Feng, Jennie Paik, L. Jay Guo","doi":"10.1039/d3qm01340e","DOIUrl":"https://doi.org/10.1039/d3qm01340e","url":null,"abstract":"High-quality and brilliant structural colors have been successfully produced using vacuum-based deposition and patterning technology in recent decades. Nevertheless, the major obstacles of high production costs and limited scalability impede the commercialization of these vibrant color products. Solution-processed structural colors, on the other hand, are renowned for their cost-effectiveness, scalability, and versatility. In this review, we provide an overview of prevalent solution-based techniques for structural color synthesis, along with their potential applications. Emphasizing the versatility of solution-processed structural colors, we discuss their capabilities in both color tuning and new ways of modifying refractive indices of dielectrics.","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":null,"pages":null},"PeriodicalIF":7.0,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142249125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Cheng Chen, Francis Kwaku Asiam, Ashok Kumar Kaliamurthy, Md. Mahbubur Rahman, Muhammad Sadiq and Jae-Joon Lee
Dye-sensitized solar cells (DSSCs) are promising technology owing to their unique properties such as high transparency, good color tunability, and easy large-area fabrication, which make them attractive candidates for emerging photovoltaic applications. However, conventional DSSCs require high-temperature processing for working and counter electrodes (WEs and CEs, respectively), limiting their diverse applications. Low temperature processing for highly catalytic CEs, particularly using poly(3,4-ethylenedioxythiophene) (PEDOT) as a conducting and catalytic replacement for platinum, shows potential for increased efficiency under various light conditions. Despite the high catalytic activity of PEDOT, its limited solubility and processing technologies (e.g., electrochemical deposition and spin-coating) have necessitated the interest in composites of PEDOT either with poly(styrene sulfonate), metal compounds, or in combination with carbon materials, aiming to overcome these limitations. With the combined properties of high conductivity, catalytic activity, porosity, and low temperature processability, these CEs based on PEDOT have higher scientific and industrial prospects. Moreover, the highly transparent PEDOT-based CEs can also be used for bifacial application in DSSCs. To continuously draw interest to further research on these materials, this review provided an overview of PEDOT-based CEs for rigid, flexible, and indoor applications of DSSCs. Additionally, we discuss the changes in electronic, chemical, and stability properties associated with the formation of each type of composite material. The challenges and prospects of PEDOT-based materials are further highlighted, which pave the way for performance improvements in the future, as well as identifying other potential applications in the semiconductor industry.
{"title":"PEDOT-based counter electrodes for dye-sensitized solar cells: rigid, flexible and indoor light applications","authors":"Cheng Chen, Francis Kwaku Asiam, Ashok Kumar Kaliamurthy, Md. Mahbubur Rahman, Muhammad Sadiq and Jae-Joon Lee","doi":"10.1039/D4QM00347K","DOIUrl":"10.1039/D4QM00347K","url":null,"abstract":"<p >Dye-sensitized solar cells (DSSCs) are promising technology owing to their unique properties such as high transparency, good color tunability, and easy large-area fabrication, which make them attractive candidates for emerging photovoltaic applications. However, conventional DSSCs require high-temperature processing for working and counter electrodes (WEs and CEs, respectively), limiting their diverse applications. Low temperature processing for highly catalytic CEs, particularly using poly(3,4-ethylenedioxythiophene) (PEDOT) as a conducting and catalytic replacement for platinum, shows potential for increased efficiency under various light conditions. Despite the high catalytic activity of PEDOT, its limited solubility and processing technologies (<em>e.g.</em>, electrochemical deposition and spin-coating) have necessitated the interest in composites of PEDOT either with poly(styrene sulfonate), metal compounds, or in combination with carbon materials, aiming to overcome these limitations. With the combined properties of high conductivity, catalytic activity, porosity, and low temperature processability, these CEs based on PEDOT have higher scientific and industrial prospects. Moreover, the highly transparent PEDOT-based CEs can also be used for bifacial application in DSSCs. To continuously draw interest to further research on these materials, this review provided an overview of PEDOT-based CEs for rigid, flexible, and indoor applications of DSSCs. Additionally, we discuss the changes in electronic, chemical, and stability properties associated with the formation of each type of composite material. The challenges and prospects of PEDOT-based materials are further highlighted, which pave the way for performance improvements in the future, as well as identifying other potential applications in the semiconductor industry.</p>","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142202604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Cationic fluorophore (CF) with highly twisted conformation is a kind of very important functional materials in the field of optical sensing and imaging. In this paper, isomers of pyridinium-type CFs (PyrCFs, o-, m-, p-TPA-Pyr-BP) were employed as three models, which share the same electron donor of triphenylamine (TPA) and acceptor of pyridinium (Pyr) but with different link positions. For the purpose to demonstrate the isomer effect of o-, m-, p-TPA-Pyr-BP, extensive research works, including of aggregation-induced emission (AIE) capability, sensing ability and the cell imaging behavior have been systematically evaluated. Furthermore, based on the experimental facts and theoretical calculations, a deeper understanding on the internal optical mechanism was also revealed. Finally, p-TPA-Pyr-BP was verified as a highly powerful multi-functional material, and successfully used in various applications.
{"title":"Isomer Effect Study of Pyridinium-type Cationic Fluorophores: Multiple Functions and Internal Optical Mechanism","authors":"Yasong Cao, Caili Zhang, Zhonghua Zhao, Haowen Huang, Jiatong Xu, Richao Shen, Cheng Zeng, Jiawei Lv, Ziqiang Lei, Hengchang Ma","doi":"10.1039/d4qm00578c","DOIUrl":"https://doi.org/10.1039/d4qm00578c","url":null,"abstract":"Cationic fluorophore (CF) with highly twisted conformation is a kind of very important functional materials in the field of optical sensing and imaging. In this paper, isomers of pyridinium-type CFs (PyrCFs, o-, m-, p-TPA-Pyr-BP) were employed as three models, which share the same electron donor of triphenylamine (TPA) and acceptor of pyridinium (Pyr) but with different link positions. For the purpose to demonstrate the isomer effect of o-, m-, p-TPA-Pyr-BP, extensive research works, including of aggregation-induced emission (AIE) capability, sensing ability and the cell imaging behavior have been systematically evaluated. Furthermore, based on the experimental facts and theoretical calculations, a deeper understanding on the internal optical mechanism was also revealed. Finally, p-TPA-Pyr-BP was verified as a highly powerful multi-functional material, and successfully used in various applications.","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":null,"pages":null},"PeriodicalIF":7.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142202605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Manganese oxides are considered highly promising as cathode materials for aqueous zinc-ion batteries (ZIBs) owing to their abundant resources, high discharge potential, and substantial theoretical capacity. Nonetheless, MnO is commonly perceived to exhibit insufficient electrochemical activity and is deemed unsuitable for Zn2+ storage. Herein, MnO-embedded PDA-derived carbon (MnO/C-PDA) is utilized as the cathode material for ZIBs, and its electrochemical behavior in ZnSO4 electrolytes with varying MnSO4 concentrations is investigated. The results indicate that the incorporation of manganese salt electrolyte notably enhances electrode capacity, though excessively high concentrations of manganese salt diminish electrode activity. In the electrolyte containing 0.2 M MnSO4, MnO-C/PDA exhibits a capacity of 295.4 mA h g−1 at 0.1 A g−1, with negligible capacity degradation even after 100 cycles. Ex situ characterization reveals that during the charging process, MnO transformed into amorphous MnOx, accompanied by the deposition of manganese salts forming MnOx, while the discharge process involved the co-insertion of Zn2+ and H+. This work is anticipated to enhance comprehension regarding the charge and discharge mechanisms of MnO, thus aiding in the development of manganese oxide cathodes tailored for ZIBs.
锰氧化物资源丰富、放电电位高、理论容量大，因此被认为非常有希望成为水性锌离子电池（ZIB）的阴极材料。然而，人们普遍认为氧化锰的电化学活性不足，不适合储存 Zn2+。本文利用 MnO 嵌入 PDA 衍生碳（MnO/C-PDA）作为 ZIB 的阴极材料，并研究了其在不同 MnSO4 浓度的 ZnSO4 电解质中的电化学行为。结果表明，加入锰盐电解质可显著提高电极容量，但锰盐浓度过高会降低电极活性。在含有 0.2 M MnSO4 的电解液中，MnO-C/PDA 在 0.1 A g-1 的条件下显示出 295.4 mA h g-1 的容量，即使循环 100 次后，容量衰减也可以忽略不计。原位表征显示，在充电过程中，MnO 转变为无定形的 MnOx，同时锰盐沉积形成 MnOx，而放电过程则涉及 Zn2+ 和 H+ 的共同插入。这项研究有望加深人们对氧化锰充放电机理的理解，从而帮助开发适合 ZIB 的氧化锰阴极。
{"title":"Manganese(II) oxide-embedded dopamine-derived carbon nanospheres for durable zinc-ion batteries","authors":"Zixiang Zhou, Jianbo Tong, Jiale Guo, Shaofeng Guo, Shuhan Liu, Zhipeng Qin, Zelei Chang, Chao Wang, Shuling Liu","doi":"10.1039/d4qm00505h","DOIUrl":"https://doi.org/10.1039/d4qm00505h","url":null,"abstract":"Manganese oxides are considered highly promising as cathode materials for aqueous zinc-ion batteries (ZIBs) owing to their abundant resources, high discharge potential, and substantial theoretical capacity. Nonetheless, MnO is commonly perceived to exhibit insufficient electrochemical activity and is deemed unsuitable for Zn<small><sup>2+</sup></small> storage. Herein, MnO-embedded PDA-derived carbon (MnO/C-PDA) is utilized as the cathode material for ZIBs, and its electrochemical behavior in ZnSO<small><sub>4</sub></small> electrolytes with varying MnSO<small><sub>4</sub></small> concentrations is investigated. The results indicate that the incorporation of manganese salt electrolyte notably enhances electrode capacity, though excessively high concentrations of manganese salt diminish electrode activity. In the electrolyte containing 0.2 M MnSO<small><sub>4</sub></small>, MnO-C/PDA exhibits a capacity of 295.4 mA h g<small><sup>−1</sup></small> at 0.1 A g<small><sup>−1</sup></small>, with negligible capacity degradation even after 100 cycles. <em>Ex situ</em> characterization reveals that during the charging process, MnO transformed into amorphous MnO<small><sub><em>x</em></sub></small>, accompanied by the deposition of manganese salts forming MnO<small><sub><em>x</em></sub></small>, while the discharge process involved the co-insertion of Zn<small><sup>2+</sup></small> and H<small><sup>+</sup></small>. This work is anticipated to enhance comprehension regarding the charge and discharge mechanisms of MnO, thus aiding in the development of manganese oxide cathodes tailored for ZIBs.","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":null,"pages":null},"PeriodicalIF":7.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142202610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bismuth sulfide (Bi2S3), as a photoelectric material, could convert light signals to electrical signals and thus hold tremendous promise in constructing wireless electrical stimulation to accelerate nerve regeneration. However, the easily recombination of electrons and holes weakened the electrical stimulation effect. Herein, a core-shell Bi2S3@PPy nanorod was prepared via in-situ hydrothermal polymerization of conductive polypyrrole (PPy) on Bi2S3, and then blended into poly-L-lactic acid powder to fabricate nerve conduit by laser additive manufacturing. Under the rotating magnetic field, the conductive Bi2S3@PPy in the conduit could cut the magnetic inductance line to generate induced electromotive force, which could drive the electron and hole of Bi2S3 moved to the opposite direction and thereby achieving their efficient separation. Results indicated that the enhanced electron-hole separation boosted the generation of photocurrent, with an output current of 7.5 μA, significantly higher than the photocurrent under light irradiation (5.0 μA) and the induced current under magnetic field (2.5 μA). The immunofluorescent staining demonstrated that the enhanced photocurrent could up-regulate the expression of neuronal marker Nestin and GFAP. Moreover, the Ca2+ intracellular influx was improved, which manifested that the differentiation of BMSCs into neurons was provoked. Overall, this work might provide a potential wireless electrical stimulation strategy for accelerating nerve repair.
{"title":"Electromagnetic induction drives electron-hole separation in optoelectronic nerve conduit to accelerate nerve repair","authors":"Cijun Shuai, Feng Ding, Xiaosong Chen, Huarui Zhou, Hongyi Qian, Yifeng Wang, Yanyan Chen, Fangwei Qi, Xinna Bai","doi":"10.1039/d4qm00452c","DOIUrl":"https://doi.org/10.1039/d4qm00452c","url":null,"abstract":"Bismuth sulfide (Bi2S3), as a photoelectric material, could convert light signals to electrical signals and thus hold tremendous promise in constructing wireless electrical stimulation to accelerate nerve regeneration. However, the easily recombination of electrons and holes weakened the electrical stimulation effect. Herein, a core-shell Bi2S3@PPy nanorod was prepared via in-situ hydrothermal polymerization of conductive polypyrrole (PPy) on Bi2S3, and then blended into poly-L-lactic acid powder to fabricate nerve conduit by laser additive manufacturing. Under the rotating magnetic field, the conductive Bi2S3@PPy in the conduit could cut the magnetic inductance line to generate induced electromotive force, which could drive the electron and hole of Bi2S3 moved to the opposite direction and thereby achieving their efficient separation. Results indicated that the enhanced electron-hole separation boosted the generation of photocurrent, with an output current of 7.5 μA, significantly higher than the photocurrent under light irradiation (5.0 μA) and the induced current under magnetic field (2.5 μA). The immunofluorescent staining demonstrated that the enhanced photocurrent could up-regulate the expression of neuronal marker Nestin and GFAP. Moreover, the Ca2+ intracellular influx was improved, which manifested that the differentiation of BMSCs into neurons was provoked. Overall, this work might provide a potential wireless electrical stimulation strategy for accelerating nerve repair.","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":null,"pages":null},"PeriodicalIF":7.0,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142202606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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