Colloids and Surfaces A: Physicochemical and Engineering Aspects最新文献

2D/3D g-C₃N₄ Nanosheet/CeO₂ Shuttle Heterostructure with Type-II Band Alignment for Visible-Light-Driven Pollutant Degradation 2D/3D g-C₃N₄纳米片/CeO₂穿梭异质结构ⅱ型波段对准可见光驱动污染物降解

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-10-15 DOI: 10.1016/j.colsurfa.2026.142096

Shabana Shaheen, Wenjing An, Lan-Lan Lou, Shijia Jiang, Farzana Sadaf, Iqra Afzal, Jun Xu

Persistent chlorophenolic pollutants require efficient and reusable photocatalysts for sustainable wastewater remediation. We hypothesized that coupling two-dimensional graphitic carbon nitride (g-C₃N₄) nanosheets with three-dimensional shuttle-like cerium dioxide (CeO₂) would create an extended heterointerface that promotes photogenerated charge separation and enhances visible-light photocatalytic activity. To test this hypothesis, morphology-engineered g-C₃N₄/CeO₂ heterojunctions were constructed through hydrothermal and wet-chemical methods. Microscopic observations and elemental mapping confirmed intimate interfacial contact and homogeneous dispersion of g-C₃N₄ nanosheets over the CeO₂ shuttles. X-ray photoelectron spectra revealed a shift of the O 1 s signal toward lower binding energy, indicating interfacial electron transfer and increased electron density around the oxygen atoms of CeO₂. Photoluminescence, photocurrent, and electrochemical impedance measurements further demonstrated suppressed electron–hole recombination, accelerated interfacial charge transport, and reduced charge-transfer resistance. Consequently, the optimized composite, prepared with 15% g-C₃N₄ relative to CeO₂ by mass, achieved 96.6% degradation of 2,4-dichlorophenol within 3 h under visible-light irradiation, compared with only 30% degradation using pristine CeO₂. The combined surface, optical, photoelectrochemical, and radical-trapping results supported a proposed Type-II charge-transfer pathway, in which CeO₂ acts as an electron acceptor and superoxide radicals (•O₂⁻) serve as the predominant reactive species. The optimized photocatalyst maintained nearly unchanged activity over four consecutive cycles. The novelty of this work lies in constructing a morphology-controlled two-dimensional/three-dimensional nanosheet–shuttle interface that provides extensive interfacial contact, efficient charge migration, high photocatalytic performance and reproducible cycling behaviour under constant catalyst-loading conditions.

持久性氯酚类污染物需要高效、可重复使用的光催化剂来实现废水的可持续修复。我们假设将二维石墨氮化碳（g-C₃N₄）纳米片与三维梭状二氧化铈（CeO₂）偶联可以形成一个扩展的异质界面，促进光生电荷分离，提高可见光光催化活性。为了验证这一假设，通过水热法和湿化学法构建了形态工程的g-C₃N₄/CeO₂异质结。微观观察和元素映射证实了g-C₃N₄纳米片在CeO₂梭上的密切界面接触和均匀分散。x射线光电子能谱显示O 1s信号向较低结合能方向移动，表明界面电子转移和氧原子周围电子密度增加。光致发光、光电流和电化学阻抗测量进一步证明了抑制电子-空穴复合、加速界面电荷传输和降低电荷转移电阻。结果表明，在可见光照射下，g-C₃N₄与ceo2质量比为15%的复合材料对2,4-二氯苯酚的降解率为96.6%，而原始ceo2的降解率仅为30%。结合表面，光学，光电化学和自由基捕获的结果支持了ii型电荷转移途径，其中ceo2作为电子受体，超氧自由基（O₂-）是主要的反应物质。优化后的光催化剂在连续四个循环中几乎保持不变的活性。这项工作的新颖之处在于构建了一个形态控制的二维/三维纳米片-穿梭界面，它提供了广泛的界面接触，有效的电荷迁移，高光催化性能和在恒定催化剂负载条件下可重复的循环行为。

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引用次数: 0

Fabrication of Thin-coated PDMS/PP Composite Membranes and Investigation of the Coating Formation Mechanism and the Removal Performance towards Dissolved Oxygen 薄包覆PDMS/PP复合膜的制备、包覆机理及对溶解氧去除性能的研究

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-10-15 DOI: 10.1016/j.colsurfa.2026.142107

Xiaonan Fu, Zhihao Gao, Zhiyou Pu, Jingyu Chu, Biao Wu, Xiao Wu, Zhenyu Cui

Polypropylene (PP) hollow fiber degassing membrane is easy to be wetted by water during long-term operation due to its poor intrinsic hydrophobicity. In this study, PDMS/PP hydrophobic composite membrane was prepared via dip-coating polydimethylsiloxane (PDMS). In this process, the pre-crosslinking time was controlled to adjust the coating solution to the minimum viscosity capable of forming a continuous coating layer. Meanwhile, the spreading of PDMS on the membrane surface was promoted by regulating the PDMS concentration, coating time and drying temperature, ultimately producing a thin and uniform PDMS coating layer. This study elucidated the formation process and anti-wetting mechanism of the PDMS coating layer. The effects of PDMS concentration, coating time and drying temperature on the morphology of coating layer, hydrophobicity and degassing performance were systematically investigated. The results showed that the water contact angle of the prepared composite membrane increased to 107.5 °. The DO removal rate was 74% and retained approximately 90% of the degassing performance of the pristine PP membrane. However, after 2160 min of continuous operation, the DO removal rate can still remain stable at 70%, which suggested that both the anti-wetting performance and long-term operational stability were significantly superior to those of the PP substrate membrane. The fluorine-free, environmentally friendly and simple modification method used in this study achieves a synergistic enhancement in both degassing efficiency and operational stability, which provides technical support for the industrial application of high-performance hydrophobic degassing membranes.

聚丙烯（PP）中空纤维脱气膜由于其固有疏水性差，在长期运行过程中容易被水浸湿。本研究通过浸涂聚二甲基硅氧烷（PDMS）制备了PDMS/PP疏水复合膜。在此过程中，通过控制预交联时间，将涂覆液调整到能够形成连续涂覆层的最小粘度。同时，通过调节PDMS浓度、涂膜时间和干燥温度，促进PDMS在膜表面的扩散，最终形成薄而均匀的PDMS涂膜层。本研究阐明了PDMS涂层的形成过程和抗润湿机理。系统考察了PDMS浓度、涂层时间和干燥温度对涂层形貌、疏水性和脱气性能的影响。结果表明，制备的复合膜的水接触角提高到107.5°。DO去除率为74%，保留了原始PP膜约90%的脱气性能。但在连续运行2160 min后，DO去除率仍能稳定在70%，说明其抗润湿性能和长期运行稳定性均明显优于PP基膜。本研究采用的无氟、环保、简单的改性方法实现了脱气效率和运行稳定性的协同提升，为高性能疏水脱气膜的工业应用提供了技术支持。

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引用次数: 0

Efficient and selective flotation recovery of chrysocolla via EDA/2-MP synergistic activation: Performance and adsorption mechanism EDA/2-MP协同活化浮选回收黄铜矿：性能及吸附机理

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-08-20 DOI: 10.1016/j.colsurfa.2026.141616

Haoxiang Wang, Peilun Shen, Dianwen Liu, Rong Peng, Hang Zhu, Xianren Dai, Jinpeng Cai

Chrysocolla is one of the most difficult oxide copper minerals to recover by flotation because of its strong hydrophilicity, low reactivity, and poor adaptability to conventional activation methods. In this study, an EDA/2-MP synergistic activation system was developed using KBX as the collector. At pH 10, single-mineral flotation tests were conducted with 38–74 μm chrysocolla at a pulp solid concentration of 10 g/L and a flotation time of 8 min, with three independent tests performed for each condition; an artificial chrysocolla–dolomite mixture at a mass ratio of 1:1 was also used to evaluate separation performance. At EDA, 2-MP, and KBX concentrations of 40, 280, and 60 mg/L, respectively, chrysocolla recovery reached 95.34%. In the mixed-mineral system, concentrate Cu recovery remained above 95%, with a Cu grade of approximately 34%. FIB-TEM revealed a continuous low-crystallinity film approximately 31.2–33.9 nm thick after EDA/2-MP treatment. Raman, XPS, and ToF-SIMS showed that EDA/2-MP altered the chemical environments of surface Cu, N, and S species and promoted the enrichment of KBX-related components at the activated interface. Accordingly, EDA/2-MP pretreatment followed by KBX addition increased the chrysocolla contact angle from 24.52° to 82.65°, confirming surface hydrophobization. This study provides a new selective interfacial activation strategy for efficient flotation recovery of refractory silicate-type oxide copper minerals.

黄铜矿具有亲水性强、反应活性低、对常规活化方法适应性差等特点，是浮选回收难度最大的氧化铜矿物之一。本研究以KBX为捕收剂，建立了EDA/2-MP协同活化体系。在pH 10条件下，矿浆固相浓度为10 g/L，浮选时间为8 min，单矿物浮选38 ~ 74 μm黄铜矿，每种条件下进行3次独立浮选试验；还采用质量比为1:1的人工青石-白云石混合物对分离性能进行了评价。在EDA、2-MP和KBX浓度分别为40、280和60 mg/L时，黄钻回收率达95.34%。在混合矿物体系中，铜精矿回收率保持在95%以上，铜品位约为34%。经EDA/2-MP处理后，FIB-TEM显示出约31.2-33.9 nm厚的连续低结晶度薄膜。Raman、XPS和ToF-SIMS结果表明，EDA/2-MP改变了表面Cu、N和S的化学环境，促进了活化界面上kbx相关组分的富集。因此，EDA/2-MP预处理后再加入KBX，使黄斑接触角从24.52°增加到82.65°，证实了表面疏水。本研究为难选硅酸盐型氧化铜矿物的高效浮选回收提供了一种新的选择性界面活化策略。

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引用次数: 0

PDMAEMA as a pH/temperature- responsive switch enhanced corrosion resistance of self-healing epoxy coatings PDMAEMA作为pH/温度响应开关，增强了自愈环氧涂料的耐腐蚀性

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-08-19 DOI: 10.1016/j.colsurfa.2026.141584

Jiaqi Huang, Jianyu Wang, Wei Xiang, Meiping Wu, Xiaojin Miao

A dual-responsive self-healing epoxy coating was developed by incorporating a smart microcapsule (rGO@SiO₂-95S-P). PDMAEMA acted as a responsive gatekeeper, enabling faster 95S release under acidic conditions and at temperatures below its LCST range. Meanwhile, the photothermal conversion of rGO increased the coating temperature under 808 nm NIR irradiation, enhancing epoxy-chain mobility and promoting partial scratch closure. UV-Vis spectroscopy, infrared thermography, optical microscopy, electrochemical measurements, and SEM/EDS were employed to evaluate the responsive release, scratch-recovery behavior, and corrosion protection of the coating. Under NIR irradiation for 600 s, the composite coating reached 48.6 °C and exhibited an average scratch-width reduction of 0.5321 mm. After scratching and NIR treatment, the coating maintains a relatively high |Z|_f=0.01Hz of 5.08×10⁵ Ω·cm² and an R_ct of 8.922×10⁵ Ω·cm². At pH=3, the composite coating exhibited an I_corr of 1.286×10^-8A·cm^-2 and an R_ct of 2.053×10⁷ Ω·cm². SEM/EDS observations further revealed a comparatively uniform Q235 steel surface with fewer coarse corrosion products under acidic conditions. These results demonstrate that the combination of responsive inhibitor release, NIR-induced partial scratch closure, and physical barrier protection provides the composite coating with effective corrosion protection, particularly under acidic conditions.

通过加入智能微胶囊（rGO@SiO₂-95S-P），开发了一种双响应自修复环氧涂层。PDMAEMA作为反应灵敏的看门人，在酸性条件下和低于最低温度范围的温度下，能够更快地释放95S。同时，在808 nm近红外照射下，还原氧化石墨烯的光热转化提高了涂层温度，增强了环氧链的迁移率，促进了部分划痕的闭合。采用紫外可见光谱、红外热像仪、光学显微镜、电化学测量和扫描电镜/能谱仪对涂层的响应释放、划痕恢复行为和防腐性能进行了评价。近红外辐照600 s后，涂层温度达到48.6℃，平均划痕宽度减小0.5321 mm。经过划伤和近红外处理后，涂层的|Z|f=0.01Hz保持在5.08×105 Ω·cm2， Rct为8.922×105 Ω·cm2。在pH=3时，复合涂层的Icorr为1.286×10-8 A·cm-2， Rct为2.053×107 Ω·cm -2。SEM/EDS观察进一步表明，在酸性条件下，Q235钢表面相对均匀，粗腐蚀产物较少。这些结果表明，响应性缓蚀剂释放、nir诱导的部分划痕闭合和物理屏障保护相结合，为复合涂层提供了有效的腐蚀保护，特别是在酸性条件下。

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引用次数: 0

Structural response and competitive pore filling of phenol and caffeine in hydrophobic microporous carbons 疏水微孔碳中苯酚和咖啡因的结构响应和竞争性孔隙填充

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-08-19 DOI: 10.1016/j.colsurfa.2026.141479

Zineb El Oufir, Nathalie Mathieu, Sandrine Delpeux-Ouldriane, Hamidréza Ramézani

Understanding what governs molecular selectivity in confined hydrophobic nanopores remains a central challenge in interfacial science. The adsorption behavior of phenol and caffeine on hydrophobic, disordered microporous carbon cloth was investigated to clarify how molecular-water affinity, rather than molecular size or molecular-carbon affinity, governs competitive adsorption mechanisms in confined carbon porosity. A combination of adsorption isotherms (UV spectroscopy), thermodesorption, X-ray diffraction, N₂/CO₂ physisorption, and SAXS-WAXS was employed. Both molecules enter the micropores, but caffeine shows restricted entry into ultramicropores. Phenol exhibits a higher adsorption capacity, attributable to additional favorable carbon-phenol interactions, and adsorbs in both solvated and unsolvated forms, revealing heterogeneous surface interaction pathways; caffeine, by contrast, shows evidence of self-association via

π - π

stacking within less confined supermicropores. Despite its faster adsorption kinetics, phenol uptake is strongly suppressed by caffeine under competitive conditions. Thermodynamic analysis confirms spontaneous physisorption for both species, with a more favorable Gibbs free energy of adsorption for caffeine, consistent with its weaker affinity for water relative to the carbon surface; conversely, phenol’s stronger water affinity facilitates its displacement from the pore network in favor of caffeine. Structural characterization shows that adsorption does not involve penetration into the interlayer spacing (

\approx 0.41

nm), confirming confinement to micro- and supermicroporosity, while a loading-dependent reduction in apparent interlayer distance is observed after adsorption for both adsorbates. SAXS-WAXS results are consistent with a possible adsorption-induced contraction of the pore walls.

理解是什么控制了分子在受限的疏水纳米孔中的选择性仍然是界面科学的核心挑战。研究了苯酚和咖啡因在疏水无序微孔碳布上的吸附行为，以阐明在有限的碳孔隙中，分子-水亲和性而不是分子大小或分子-碳亲和性是如何决定竞争吸附机制的。采用吸附等温线（紫外光谱）、热脱附、x射线衍射、N2/CO2物理吸附和SAXS-WAXS相结合的方法。这两种分子都能进入微孔，但咖啡因进入超微孔受到限制。苯酚表现出更高的吸附能力，归因于额外的有利的碳-苯酚相互作用，并以溶剂化和非溶剂化形式吸附，揭示了非均匀的表面相互作用途径；相比之下，咖啡因在限制较少的超微孔中通过π−π堆积表现出自结合的证据。尽管苯酚的吸附动力学更快，但在竞争条件下，咖啡因会强烈抑制苯酚的吸收。热力学分析证实了两种物质的自发物理吸附，对咖啡因的吉布斯自由能更有利，这与咖啡因相对于碳表面对水的亲和力较弱相一致；相反，苯酚较强的亲水性促进了它从孔隙网络中取代咖啡因。结构表征表明，吸附不涉及渗透到层间间距（≈0.41 nm），证实了微孔和超微孔的限制，而两种吸附剂在吸附后观察到表观层间距离的减少与负载有关。SAXS-WAXS结果与可能的吸附引起的孔壁收缩一致。

{"title":"Structural response and competitive pore filling of phenol and caffeine in hydrophobic microporous carbons","authors":"Zineb El Oufir, Nathalie Mathieu, Sandrine Delpeux-Ouldriane, Hamidréza Ramézani","doi":"10.1016/j.colsurfa.2026.141479","DOIUrl":"10.1016/j.colsurfa.2026.141479","url":null,"abstract":"<div><div>Understanding what governs molecular selectivity in confined hydrophobic nanopores remains a central challenge in interfacial science. The adsorption behavior of phenol and caffeine on hydrophobic, disordered microporous carbon cloth was investigated to clarify how molecular-water affinity, rather than molecular size or molecular-carbon affinity, governs competitive adsorption mechanisms in confined carbon porosity. A combination of adsorption isotherms (UV spectroscopy), thermodesorption, X-ray diffraction, N<sub>2</sub>/CO<sub>2</sub> physisorption, and SAXS-WAXS was employed. Both molecules enter the micropores, but caffeine shows restricted entry into ultramicropores. Phenol exhibits a higher adsorption capacity, attributable to additional favorable carbon-phenol interactions, and adsorbs in both solvated and unsolvated forms, revealing heterogeneous surface interaction pathways; caffeine, by contrast, shows evidence of self-association via <span><math><mrow><mi>π</mi><mo>−</mo><mi>π</mi></mrow></math></span> stacking within less confined supermicropores. Despite its faster adsorption kinetics, phenol uptake is strongly suppressed by caffeine under competitive conditions. Thermodynamic analysis confirms spontaneous physisorption for both species, with a more favorable Gibbs free energy of adsorption for caffeine, consistent with its weaker affinity for water relative to the carbon surface; conversely, phenol’s stronger water affinity facilitates its displacement from the pore network in favor of caffeine. Structural characterization shows that adsorption does not involve penetration into the interlayer spacing (<span><math><mrow><mo>≈</mo><mn>0.41</mn></mrow></math></span> nm), confirming confinement to micro- and supermicroporosity, while a loading-dependent reduction in apparent interlayer distance is observed after adsorption for both adsorbates. SAXS-WAXS results are consistent with a possible adsorption-induced contraction of the pore walls.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"750 ","pages":"Article 141479"},"PeriodicalIF":5.4,"publicationDate":"2026-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148772110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A horseradish peroxidase-mediated electrochemical biosensor with functional nanointerfaces for sensitive luteolin detection in herbal samples 具有功能纳米界面的辣根过氧化物酶介导的电化学生物传感器用于草药样品中木犀草素的敏感检测

2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-06-29 DOI: 10.1016/j.colsurfa.2026.141217

Chao-ying Xu, Guang-Hua Tong, Zhang Yi-di, T Liu, Hui-Xin Zheng, Wei Nie, Fei-Yu Zhang, Sanad Abdalbagemohammedabdalsadeg, Jun Hong, Bao-Lin Xiao

引用次数: 0

Investigation of surfactant effects on foam properties in quartz flotation with dodecylamine 表面活性剂对十二胺浮选石英泡沫性能影响的研究

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-05-20 Epub Date: 2026-01-29 DOI: 10.1016/j.colsurfa.2026.139749

Yuxin Ao , Cong Han , Yanbai Shen , Ruixue Ma , Sikai Zhao , Qiang Zhao , Baoyu Cui

This study investigates the synergistic effects of three surfactants: n-octanol (OCT), sodium dodecyl sulfate (SDS), and cetyltrimethylammonium bromide (CTAB) combined with dodecylamine (DDA) on foam properties and quartz flotation. Results show that at optimized concentrations, the impact on foam generation and liquid-phase stability followed the order: CTAB > OCT > SDS, while volumetric stability ranked as CTAB > SDS > OCT. Foam performance and persistence were inversely correlated with particle size, with smaller particles benefiting more from the combined reagents. All surfactants modified gas-liquid interfacial properties, altering foam dynamics. While surfactant incorporation significantly reduced the required DDA dosage, the flotation capacity of quartz remained largely unchanged. This study provides valuable insights into the role of surfactant-DDA combinations in enhancing foam stability and flotation efficiency, offering practical implications for industrial flotation processes.

研究了正辛醇（OCT）、十二烷基硫酸钠（SDS）和十六烷基三甲基溴化铵（CTAB）与十二烷基胺（DDA）复合三种表面活性剂对泡沫性能和石英浮选的协同作用。结果表明，在最佳浓度下，对泡沫生成和液相稳定性的影响顺序为：CTAB >； OCT >； SDS，体积稳定性依次为：CTAB >； SDS >； OCT。泡沫性能和持久性与颗粒大小呈负相关，颗粒越小，从组合试剂中受益越多。所有表面活性剂都能改变气液界面性质，改变泡沫动力学。表面活性剂的掺入显著降低了DDA用量，但石英的浮选能力基本保持不变。该研究为表面活性剂- dda组合在提高泡沫稳定性和浮选效率方面的作用提供了有价值的见解，为工业浮选工艺提供了实际意义。

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引用次数: 0

Effects and mechanisms of zero-valent iron-loaded corn straw biochars on Cd(II) adsorption onto loessial soil 零价载铁玉米秸秆生物炭对黄土吸附Cd（II）的影响及机理

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-05-20 Epub Date: 2026-01-30 DOI: 10.1016/j.colsurfa.2026.139729

Xujun Nan , Baowei Zhao , Fengfeng Ma , Yuling Chen , Hai Wang , Dengdi Xu

Cadmium (Cd) contamination in loess is a growing environmental concern due to its toxicity and mobility. Stabilization-based remediation technology is a promising approach, and Fe⁰-modified biochar exhibits strong immobilization performance. In this study, nano zero-valent iron (nZVI) was synthesized via the liquid-phase reduction method and loaded onto corn straw biochar prepared at 300°C and 600°C (MSB300 and MSB600) to form composite adsorbents (nZVI@MSB300 and nZVI@MSB600). The adsorption behavior of Cd(II) on loess soil (Ls) and 1:9 (w/w) biochar–soil mixtures (nZVI@MSB300-Ls and nZVI@MSB600-Ls) was investigated by batch experiments. The effects of contact time, initial Cd(II) concentration, and solution pH on the adsorption behavior were tested. Kinetics, isotherms, and material characterization were investigated to elucidate the sorption performance and mechanisms. The maximum adsorption capacities of Ls, nZVI@MSB300-Ls, and nZVI@MSB600-Ls for Cd(Ⅱ) were 6.3, 9.8, and 13.0 mg/g, respectively, with nZVI@MSB600-Ls exhibiting the highest performance. The adsorption kinetics conformed to the pseudo-second-order model (R²≥0.91), and the adsorption isotherms fitted the Langmuir model (R²≥0.95), indicating a chemisorption-dominated mechanism. Post-adsorption characterization using Scanning electron microscope-Energy dispersive spectrometer (SEM–EDS), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction spectroscopy (XRD), and X-ray photoelectron spectroscopy (XPS) revealed that nZVI@MSB300 and nZVI@MSB600 mainly immobilized Cd(II) through complexation, cation exchange, cation–π interactions, and precipitation, whereas loess primarily relied on complexation and precipitation. These results demonstrate that nZVI@MSB amendment effectively enhances Cd(II) adsorption onto loess, offering a promising immobilization strategy for mitigating cadmium contamination in soils.

黄土中的镉污染因其毒性和流动性而日益受到环境问题的关注。基于稳定的修复技术是一种很有前途的方法，fe0修饰的生物炭具有很强的固定化性能。本研究采用液相还原法合成纳米零价铁（nZVI），并将其负载于300℃和600℃制备的玉米秸秆生物炭（MSB300和MSB600）上，形成复合吸附剂（nZVI@MSB300和nZVI@MSB600）。通过批量试验研究了Cd（II）在黄土（Ls）和1:9 （w/w）生物炭-土壤混合物（nZVI@MSB300-Ls和nZVI@MSB600-Ls）上的吸附行为。考察了接触时间、初始Cd（II）浓度和溶液pH对吸附行为的影响。研究了吸附动力学、等温线和材料表征，以阐明吸附性能和机理。Ls、nZVI@MSB300-Ls和nZVI@MSB600-Ls对Cd（Ⅱ）的最大吸附量分别为6.3、9.8和13.0 mg/g，其中nZVI@MSB600-Ls的吸附性能最好。吸附动力学符合拟二阶模型（R²≥0.91），吸附等温线符合Langmuir模型（R²≥0.95），表明吸附机理以化学吸附为主。利用扫描电镜-能谱仪（SEM-EDS）、傅里叶变换红外光谱（FTIR）、x射线衍射光谱（XRD）和x射线光电子能谱（XPS）对吸附后物质进行表征，发现nZVI@MSB300和nZVI@MSB600主要通过络合、阳离子交换、阳离子-π相互作用和沉淀来固定Cd(II)，而黄土主要通过络合和沉淀来固定Cd（II）。结果表明，nZVI@MSB改性剂能有效增强黄土对Cd（II）的吸附，为缓解土壤镉污染提供了一种有前景的固定化策略。

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引用次数: 0

Sequential silica- and phosphate-assisted zirconia coating for phase stabilization of micrometer-sized platy γ-alumina 连续二氧化硅和磷酸盐辅助氧化锆涂层用于微米级γ-氧化铝板的相稳定

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-05-20 Epub Date: 2026-01-27 DOI: 10.1016/j.colsurfa.2026.139721

Shingo Machida , Daisaku Yokoe , Toshimichi Shibue , Hajime Okawa , Takayuki Nagano

Sequential modification was applied to stabilize of γ-alumina toward phase transformation into α-alumina even at the relatively high temperature of 1300°C. A zirconia layer was first deposited, followed by phosphorus introduction through trimethylphosphate treatment, and finally a silica coating via a sol–gel reaction. Phase and structural evolution were characterized by X-ray diffraction, solid-state nuclear magnetic resonance, and electron microscopy. While zirconia-coated specimens transformed into α-alumina at 1300°C, the combined incorporation of phosphorus and silica—through sequential coatings of zirconia containing phosphorus and silica—effectively suppressed zirconia crystallization on γ-alumina. This stabilization also delayed the γ-to-α phase transformation even after calcination at 1300°C. In this process, phosphorus contributes to the stabilization through the formation of zirconium and aluminum phosphates, resulting from its diffusion from the zirconia layers into the underlying γ-alumina, whereas silica promotes the formation of Si–O–Zr linkages while preserving its coating layer. These effects cooperatively suppress zirconia crystallization. Therefore, these results demonstrated that sequential multi-element modification provides a promising route to enhance the phase stability of various as-prepared γ-aluminas.

在1300℃的高温下，通过序次改性使γ-氧化铝向α-氧化铝的相变趋于稳定。首先沉积氧化锆层，然后通过三甲基磷酸盐处理引入磷，最后通过溶胶-凝胶反应形成二氧化硅涂层。通过x射线衍射、固体核磁共振和电子显微镜对物相和结构演化进行了表征。当氧化锆涂层的样品在1300℃时转变为α-氧化铝时，磷和硅的结合-通过连续的含磷氧化锆和含硅氧化锆涂层-有效地抑制了氧化锆在γ-氧化铝上的结晶。即使在1300℃煅烧后，这种稳定性也延迟了γ-to-α相变。在这一过程中，磷从氧化锆层扩散到下面的γ-氧化铝层，从而形成磷酸锆和磷酸铝，从而有助于稳定，而二氧化硅在保留其涂层的同时促进了Si-O-Zr键的形成。这些效应共同抑制氧化锆结晶。因此，这些结果表明，顺序多元素修饰为提高各种制备的γ-氧化铝的相稳定性提供了一条有希望的途径。

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引用次数: 0

Dual modulation vertical transistor fabricated by CVD grown CsPbBr3 as channel layer and MWCNT as source electrode 以CVD生长CsPbBr3为沟道层，MWCNT为源电极制备双调制垂直晶体管

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-05-20 Epub Date: 2026-01-30 DOI: 10.1016/j.colsurfa.2026.139771

Bingxue Liu , Chandrasekar Perumalveeramalai , Chuanbo Li , Peipei Ma , Bin Zou

This paper presents the fabrication of a vertical field-effect transistor (vFET) with multi-walled carbon nanotubes (MWCNT) as a porous source electrode. The optimized MWCNT electrodes, which were deposited on a SiO₂/Si (100), followed by thermal annealing, showed a sheet resistance of ∼4.1 kΩ/□ and an electrical conductivity of 3.92 × 10³ S/m at a layer thickness of ∼1.82 µm. A high-crystalline CsPbBr₃ was deposited as the channel layer by chemical vapour deposition technique. The optimized condition for MWCNT electrode was used for fabricating vFET device with CsPbBr₃ as the channel layer. The vFET has shown high on/off ratio of ∼10⁶ in the p-channel region and ∼10⁴ in the n-channel region. Our device has shown modulation of output current both at gate voltage and at drain voltage due to polarity change of Schottky contact at CNT/perovskite interface. This study establishes a novel approach to fabricate high-performance vertical transistors by using MWCNT as the source electrode.

本文介绍了一种以多壁碳纳米管（MWCNT）作为多孔源电极的垂直场效应晶体管（vFET）的制备方法。将优化后的MWCNT电极沉积在SiO2/Si（100）上，然后进行热处理，在层厚度为~ 1.82 µm时，其片电阻为~ 4.1 kΩ/□，电导率为3.92 × 103 S/m。采用化学气相沉积技术制备了高晶CsPbBr3作为通道层。利用优化后的MWCNT电极条件，制备了以CsPbBr3为通道层的vFET器件。该vFET在p沟道区域显示出高开/关比，在n沟道区域显示出高开/关比，分别为~ 106和~ 104。由于碳纳米管/钙钛矿界面上肖特基触点的极性变化，我们的器件显示出在栅极电压和漏极电压下的输出电流调制。本研究建立了一种以MWCNT为源电极制造高性能垂直晶体管的新方法。

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引用次数: 0