Development of copper-doped TiO2 photocatalyst for hydrogen production under visible light
Development of copper-doped TiO2 photocatalyst for hydrogen production under visible light
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DOI：
10.1016/j.energy.2009.07.024
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发表时间：
2009-10-01
期刊：
影响因子：
9
通讯作者：
Dutta, Binay K.
中科院分区：
文献类型：
--
作者：
Yoong, L. S.;Chong, F. K.;Dutta, Binay K.
研究了在可见光范围内对TiO 2半导体光催化剂进行铜掺杂以提高其在光催化下的产氢性能的优点。选择了两种制备铜掺杂催化剂的方法-络合物沉淀法和湿浸渍法-使用硝酸铜三水合物作为起始原料。掺杂剂负载从2%至15%变化。通过热重分析（TGA）、程序升温还原（TPR）、漫反射紫外-维斯（DR-UV-维斯）、扫描电子显微镜（SEM）、傅里叶变换红外（FTIR）光谱和X射线衍射（XRD）对光催化剂进行表征。采用多孔光催化反应器，在可见光照射下，以甲醇为空穴捕获剂，研究了水制氢的光催化活性。选择三个煅烧温度- 300、400和500 ° C。据发现，10重量% Cu/TiO 2在300 ℃下煅烧30 min产生最大量的氢气。作为掺杂的结果的带隙的减少进行了估计，并解释了工艺参数对催化活性的影响。(C)2009爱思唯尔有限公司保留所有权利。
The advantage of copper doping onto TiO2 semiconductor photocatalyst for enhanced hydrogen generation under irradiation at the visible range of the electromagnetic spectrum has been investigated. Two methods of preparation for the copper-doped catalyst were selected - complex precipitation and wet impregnation methods - using copper nitrate trihydrate as the starting material. The dopant loading varied from 2 to 15%. Characterization of the photocatalysts was done by thermogravimetric analysis (TGA), temperature programmed reduction (TPR), diffuse reflectance UV-Vis (DR-UV-Vis), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD). Photocatalytic activity towards hydrogen generation from water was investigated using a multiport photocatalytic reactor under visible light illumination with methanol added as a hole scavenger. Three calcination temperatures were selected - 300, 400 and 500 degrees C. It was found that 10 wt.% Cu/TiO2 calcined at 300 degrees C for 30 min yielded the maximum quantity of hydrogen. The reduction of band gap as a result of doping was estimated and the influence of the process parameters on catalytic activity is explained. (C) 2009 Elsevier Ltd. All rights reserved.