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Design and synthesis of ZnCoO/CdS for substantially improved photocatalytic hydrogen production

《化学科学与工程前沿（英文）》 2023年第17卷第5期页码 606-616 doi: 10.1007/s11705-022-2233-4

摘要： In this study, the hydrogen evolution performance of CdS nanorods is improved using ZnCo₂O₄. ZnCo₂O₄ nanospheres are synthesized using the hydrothermal and calcination methods, and CdS nanorods are synthesized using the solvothermal method. From the perspective of morphology, numerous CdS nanorods are anchored on the ZnCo₂O₄ microspheres. According to the experimental results of photocatalytic hydrogen evolution, the final hydrogen evolution capacity of 7417.5 μmol∙g^–1∙h^–1 is slightly more than two times that of the single CdS, which proves the feasibility of our study. Through various characterization methods, it is proved that the composite sample has suitable optoelectronic properties. In addition, ZnCo₂O₄ itself exhibits good conductivity and low impedance, which shortens the charge-transfer path. Overall, the introduction of ZnCo₂O₄ expands the adsorption range of light and improves the performance of photocatalytic hydrogen evolution. This design can provide reference for developing high-efficiency photocatalysts.

关键词： ZnCo₂O₄ nanosphere CdS nanorods photocatalytic hydrogen evolution

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Z-scheme CdS/WO on a carbon cloth enabling effective hydrogen evolution

《能源前沿（英文）》 2021年第15卷第3期页码 678-686 doi: 10.1007/s11708-021-0768-6

摘要： Photocatalytic water splitting for hydrogen (H₂) generation is a potential strategy to solve the problem of energy crisis and environmental deterioration. However, powder-like photocatalysts are difficult to recycle, and the agglomeration of particles would affect the photocatalytic activity. Herein, a direct Z-scheme CdS/WO₃ composite photocatalyst was fabricated based on carbon cloth through a two-step process. With the support of carbon cloth, photocatalysts tend to grow uniformly for further applications. The experimental results showed that the H₂ yield of adding one piece of CdS/WO₃ composite material was 17.28 μmol/h, which was 5.5 times as compared to that of pure CdS-loaded carbon cloth material. A cycle experiment was conducted to verify the stability of the as-prepared material and the result demonstrated that the H₂ generation performance of CdS/WO₃ decreased slightly after 3 cycles. This work provides new ideas for the development of recyclable photocatalysts and has a positive significance for practical applications.

关键词： photocatalysis CdS/WO₃ carbon cloth Z-scheme hydrogen evolution

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Hydrogen production from water splitting on CdS-based photocatalysts using solar light

Xiaoping CHEN, Wenfeng SHANGGUAN

《能源前沿（英文）》 2013年第7卷第1期页码 111-118 doi: 10.1007/s11708-012-0228-4

摘要： Hydrogen energy has been regarded as the most promising energy resource in the near future due to that it is a clean and sustainable energy. And the heterogeneous photocatalytic hydrogen production is increasingly becoming a research hotspot around the world today. As visible light response photocatalysts for hydrogen production, cadmium sulfide (CdS) is the most representative material, the research of which is of continuing popularity. In the past several years, there has been significant progress in water splitting on CdS-based photocatalysts using solar light, especially in the development of co-catalysts. In this paper, recent researches into photocatalytic water splitting on CdS-based photocatalysts are reviewed, including controllable synthesis of CdS, modifications with different kinds of cocatalysts, solid solution, intercalated with layered nanocomposites and metal oxides, and hybrids with graphenes etc. Finally, the problems and future challenges in photocatalytic water splitting on CdS-based photocatalysts are described.

关键词： hydrogen photocatalysis solar conversion cadmium sulfide (CdS) complex

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growth of a-few-layered MoS on CdS nanorod for high efficient photocatalytic H production

《能源前沿（英文）》 2021年第15卷第3期页码 752-759 doi: 10.1007/s11708-021-0779-3

摘要： An ultrathin MoS₂ was grown on CdS nanorod by a solid state method using sulfur powder as sulfur source for photocatalytic H₂ production. The characterization result reveals that the ultrathin MoS₂ nanosheets loaded on CdS has a good contact state. The photoelectrochemical result shows that MoS₂ not only are beneficial for charge separation, but also works as active sites, thus enhancing photocatalytic activity. Compared with pure CdS, the photocatalytic activity of MoS₂ loaded CdS was significantly improved. The hydrogen evolution rate on m(MoS₂): m(CdS) = 1: 50 (m is mass) reaches 542 μmol/h, which is 6 times of that on pure CdS (92 μmol/h). This work provides a new design for photocatalysts with high photocatalytic activities and provides a deeper understanding of the effect of MoS₂ on enhancing photocatalytic activity.

关键词： photocatalytic H₂ production CdS MoS₂ cocatalyst charge separation

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Morphological and mechanical characterization of a PMMA/CdS nanocomposite

Vishal MATHUR, Manasvi DIXIT, K.S. RATHORE, N. S. SAXENA, K.B. SHARMA

《化学科学与工程前沿（英文）》 2011年第5卷第2期页码 258-263 doi: 10.1007/s11705-010-1014-7

摘要： Thick film of poly(methyl methacrylate) (PMMA)/CdS nanocomposite have been synthesized by the solution casting process. The nanostructure of the CdS particles has been ascertained through the small angle X-ray scattering (SAXS) technique. The surface morphological characterization of the PMMA/CdS nanocomposite has been done through scanning electron microscopy (SEM) analysis. The variation of mechanical loss factor (Tan ) with temperature and tensile properties of prepared samples have been studied using Dynamic Mechanical Analyzer (DMA). This study reveals that the glass transition temperature ( ), Young’s modulus, and fracture energy of the PMMA/CdS nanocomposite are greatly influenced by the existence of interfacial energetic interaction between dispersed CdS nanoparticles and the matrix of PMMA.

关键词： poly(methyl methacrylate) (PMMA) filler nanoparticles polymer semiconducting nanocomposite tensile properties glass transition temperature

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基于磁驱动正交悬臂探针的三维原子力显微镜技术开发 Article

张号, 耿俊媛, 高海波, 荣伟彬, 谢晖

《工程（英文）》 2023年第24卷第5期页码 84-93 doi: 10.1016/j.eng.2022.06.010

摘要：

本文介绍了一种基于磁驱动正交悬臂探针（magnetically driven-orthogonal cantilever probes, MD-OCP）的三维原子力显微镜（three-dimensional atomic force microscopy, 3D-AFM）表征方法，该方法采用两个独立的三自由度纳米扫描器，能够实现探针沿可控矢量角度跟踪扫描样品表面。该3D-AFM系统还配备了高精度旋转台，可实现360°全向成像。定制的MD-OCP包含水平悬臂、垂直悬臂和磁珠三部分，其中磁珠可在磁场中机械驱动OCP实现激振。垂直悬臂具有一个突出的针尖，可检测深槽和具有悬垂/凹边特征的结构。本文首先对MD-OCP的设计、仿真、制造过程和性能分析结果进行了描述；然后，详细介绍了探针振幅补偿和360°旋转原点定位的方法。接着，使用标准AFM阶梯光栅进行对比实验，并结合三维形貌重建方法完成了图像整合，验证了所提出方法面向陡峭侧壁和拐角处细节的表征能力。通过对具有微梳结构的微机电系统（MEMS）器件进行3D表征，进一步证实了所提出的基于MD-OCP的3D-AFM技术的有效性。最后，该技术被用于确定微阵列芯片的关键尺寸（critical dimensions, CD）。实验结果表明，所提出的方法可以高精度地获取三维结构的CD信息，相比难以获得侧壁信息的二维技术，该方法在3D微纳制造检测领域具有更好的潜力。

关键词：三维原子力显微镜磁驱动正交悬臂探针关键尺寸 360°表征三维形貌重建