| 彭绍琴,刘晓燕,李越湘.复合光催化剂CdS-Pt/TiO2制备及可见光光解海水制氢性能[J].分子催化,2013,(5):459-466 |
| 复合光催化剂CdS-Pt/TiO2制备及可见光光解海水制氢性能 |
| Preparation of CdS-Pt/TiO2 Composite and the Properties for Splitting Sea |
| 投稿时间：2013-09-01 修订日期：2013-10-18 |
| DOI： |
| 中文关键词: CdS–Pt/TiO2 光催化 制氢 海水 可见光 |
| 英文关键词:CdS-Pt/TiO2 Photocatalysis Hydrogen production Seawater Visible light |
| 基金项目:国家重点基础研究发展规划资助项目(2009CB220003); 国家自然科学基金资助项目(21366022);江西省教育厅科学技术研究资助项目(GJJ13065). |
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| 中文摘要: |
| 水热法制备了单斜CdS与Pt/TiO2复合的光催化剂。通过X射线衍射、紫外-可见漫反射光谱、荧光光谱、扫描电子显微镜和BET方法对催化剂进行了表征。以可见光光解纯水和海水制氢为探针反应，考察了CdS-Pt/TiO2光催化剂的活性。结果表明：海水中无机盐的存在有利于电子给体捕获光生空穴，提高了电子和空穴的分离效果；海水中单斜CdS可转化为立方和六方混合晶相。最佳条件下，催化剂光解海水制氢活性比纯水提高了33%，而且有较高的稳定性。 |
| 英文摘要: |
| Composite photocatalyst of monoclinic CdS coupled with Pt/TiO2 was prepared by a hydrothermal method. The photocatalyst was characterized by X-ray diffraction (XRD), UV-Vis diffusive reflectance spectroscopy (DRS), scanning electron microscopy (SEM) and BET. The photoactivity was evaluated by hydrogen evolution from pure water and seawater solution under (λ≥420 nm) visible light irradiation. It has been found that the inorganic salts in sea water are beneficial to the electron donors trapping photogenerated holes. The separation of photo-generated electrons and holes is promoted. CdS can be transformed into cubic and hexagonal mixed phases in sea water. Under optimal conditions, the activity of hydrogen generation in seawater was 33% higher than that in pure water. CdS-Pt/TiO2 composite photocatalyst has a higher stability in the seawater. |
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