| 可见光下Fe3+掺杂对K2La2Ti3O10分解水制氢性能的影响 |
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| 引用本文： | 陈威,董新法,陈之善,陈胜洲,林维明.可见光下Fe3+掺杂对K2La2Ti3O10分解水制氢性能的影响[J].物理化学学报,2009,25(6):1107-1110. |
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| 作者姓名： | 陈威 董新法 陈之善 陈胜洲 林维明 |
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| 作者单位： | Guangdong Provincial Laboratory of Green Chemical Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China,School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China |
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| 摘 要： | 采用溶胶-凝胶法制备了Fe3+掺杂的Fe-K2La2Ti3O10光催化剂, 并通过X射线衍射(XRD)、紫外-可见漫反射(DRS)、X射线光电子能谱(XPS)等技术对其进行了表征和分析, 考察了不同掺杂量对K2La2Ti3O10的性质及光催化分解水制氢活性的影响. 结果表明, Fe-K2La2Ti3O10在400-650 nm范围内显示强吸收, 光谱响应扩展到可见光区(λ>400 nm), 掺杂Fe3+后, K2La2Ti3O10的可见光区的光催化制氢活性显著提高, 掺杂量为nFe/nTi=0.04时活性最佳, 当催化剂用量为0.1 g, 反应液为CH3OH(30 mL)+H2O(90 mL)时, 产氢量达到1.92 μmol·h-1, 为未掺杂时的4倍.
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| 关 键 词： | 光催化 Fe3+掺杂 K2La2Ti3O10 可见光 水分解 氢气 |
| 收稿时间： | 2009-02-20 |
| 修稿时间： | 2009-03-20 |
Effect of Fe3+ Doping on Photocatalytic Activity of K2La2Ti3O10 for Water Decomposition to Hydrogen under Visible Light |
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| CHEN Wei,DONG Xin-Fa,CHEN Zhi-Shan,CHEN Sheng-Zhou,LIN Wei-Ming.Effect of Fe3+ Doping on Photocatalytic Activity of K2La2Ti3O10 for Water Decomposition to Hydrogen under Visible Light[J].Acta Physico-Chimica Sinica,2009,25(6):1107-1110. |
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| Authors: | CHEN Wei DONG Xin-Fa CHEN Zhi-Shan CHEN Sheng-Zhou LIN Wei-Ming |
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| Institution: | Guangdong Provincial Laboratory of Green Chemical Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China|School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China |
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| Abstract: | Undoped K2La2Ti3O10 and Fe3 + doped K2La2Ti3O10 samples were prepared by the sol-gel method and characterized by X-ray diffraction (XRD), UV-Vis diffuse reflectance spectra (DRS) and X-ray photoelectron spectroscopy (XPS). The effects of Fe3+ doping quantity on the properties and photocatalytic activity for hydrogen evolution were investigated. Results showed that Fe-doped K2La2Ti3O10 showed stronger absorption in the 400-650 nm range and this expanded to the visible light (λ>400 nm). Doping with Fe3+ raised the photocatalytic activity for hydrogen generation and the optimumamount of Fe3+ doping was found to be nFe/nTi=0.04. At this ratio and under visible light the rate of hydrogen evolution of Fe-K2La2Ti3O10 was 1.92 μmol·h-1 and this was 4 times higher than that of undoped K2La2Ti3O10 when 120 mL of reactive liquid (CH3OH(30 mL)+H2O(90 mL)) containing 0.1 g photocatalyst was used. |
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| Keywords: | Photocatalysis Fe3+-doped K2La2Ti3O10 Visible light Water decomposition Hydrogen |
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