| 引用本文: | 姚忠平,李春香,吴昫江,罗霄,姜兆华.Ag负载ZnS光催化剂的制备与光催化制氢[J].哈尔滨工业大学学报,2011,43(12):100.DOI: |
| YAO Zhong-ping,LI Chun-xiang,WU Xu-jiang,LUO Xiao,JIANG Zhao-hua.Preparation of Ag-doped ZnS photo catalyst and photocalytic property for H2 production[J].Journal of Harbin Institute of Technology,2011,43(12):100.DOI: |
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| 摘要: |
| 为实现光催化制氢,通过模板剂水热合成和浸渍还原法制备出Ag负载ZnS光催化剂．利用XRD、SEM和UV-vis对样品进行结构和光学性质表征,利用光催化分解Na2S+Na2SO3溶液制氢评价光催化性能．结果表明:在酸性条件下,模板剂质量浓度较低而硫源和锌源较多时,样品为棒状,主要以立方闪锌矿结构存在;反之,样品主要为球状,以纤维锌矿结构和闪锌矿结构共存．碱性条件下,样品成球状,以立方闪锌矿结构存在．EDS分析表明,少量的Ag负载到ZnS样品表面．实验中制备的样品A为混晶结构,其对应的吸收光谱红移最大,同时负载Ag有利于光生电子和空穴的分离,表现出最佳的光催化制氢性能． |
| 关键词: ZnS光催化剂 Ag负载 UV-vis吸收光谱 光催化制氢 |
| DOI： |
| 分类号:O643. 364; O614. 24 |
| 文献标识码:A |
| 基金项目:国家高技术研究发展计划项目(2007AA03Z337);哈尔滨工业大学大学生国家级科技创新项目(2009). |
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| Preparation of Ag-doped ZnS photo catalyst and photocalytic property for H2 production |
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YAO Zhong-ping,LI Chun-xiang,WU Xu-jiang,LUO Xiao,JIANG Zhao-hua
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(School of Chemical Engineering and Technology, Harbin Institute of Technology, 150001 Harbin, China, yaozhongping@hit.edu.cn)
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| Abstract: |
| To fulfill photocatalytic hydrogen production, Ag-doped ZnS photo catalyst was prepared by template hydrothermal method and solution infiltration and reduction method. The structure and optical property were studied by XRD, SEM and UV-vis, respectively. The photocatalytic activity of the catalysts was evaluated by splitting Na2S+Na2SO3 solution into H2. The results show that in acid bath with a small amount of template and a large amount of Thiourea and Zn(Ac)2, the sample is of rod structure and exists mainly in the form of sphalerite; whereas the sample is of ball structure and co-exists in the form of wurtzite and sphalerite. In a base bath, ZnS is of rod structure and exists mainly in the form of sphalerite. EDS analysis indicates that a small amount of Ag is loaded on the ZnS. The sample A has mixed-crystallized structure with bigger red-shifted in UV-vis absorption spectrum, and the doped Ag is liable to separate the photo-induced e-and h+, which presents the best photocatalytic activity for H2 production. |
| Key words: ZnS photocatalyst Ag doping UV-vis absorption spectrum photocatalysis for H2 production |
