| 贵金属负载TiO_2光催化降解甲苯研究 |
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| 引用本文： | 童玲方,陈群华,沈永高,许旭敏.贵金属负载TiO_2光催化降解甲苯研究[J].能源环境保护,2014(3):26-29. |
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| 作者姓名： | 童玲方 陈群华 沈永高 许旭敏 |
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| 作者单位： | [1]浙江省台州市环境保护局路桥分局,台州318050 [2]浙江国辐环保科技中心,杭州310012 [3]浙江省杭州市余杭区环境保护局,杭州311100 |
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| 摘 要： | 采用Degussa P25 TiO2粉末,利用光沉积法制备贵金属负载光催化剂M/TiO2(M分别为Pt、Pd、Ag和Au)。通过气相甲苯光催化降解实验考察M/TiO2的光催化活性。实验结果表明:负载1.0 wt%的Pt、Pd、Ag和Au四种贵金属均可提高TiO2光催化降解甲苯的效率,其中Pt/TiO2的光催化活性最佳。循环伏安法(CV)、塔菲尔(Tafel)和Mott-Schottky电化学测试证明Pt的负载抑制光生电子和空穴的复合,提高载流子浓度,进而增强TiO2光催化活性。
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| 关 键 词： | 贵金属负载 TiO2 光催化活性 电化学 |
PHOTOCATALYTIC DEGRADATION OF TOLUENE OVER TIO2-SUPPORTED NOBLE METAL PHOTOCATALYSTS |
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| TONG Ling-fang,CHEN Qun-hua,XU Xu-min.PHOTOCATALYTIC DEGRADATION OF TOLUENE OVER TIO2-SUPPORTED NOBLE METAL PHOTOCATALYSTS[J].Energy Environmental Protection,2014(3):26-29. |
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| Authors: | TONG Ling-fang CHEN Qun-hua XU Xu-min |
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| Institution: | 1. Zhejiang province Taizhou City Environmental Protection Bureau Luqiao branch, Taizhou, 318050 ; 2. Zhejiang National Radiation Environmental Technology Centre, Hangzhou 310012) |
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| Abstract: | TiO2 -supported noble metal photocatalysts （M/Ti02） were prepared by photodeposition using Degussa P25 TiO2 powder. And their photocatalytic activities were studied by the photocatalytic degradation of gas toluene. The results indicated that M/TiO2, loading with 1.0 wt% Pt, Pd, Ag and Au, respectively, can all improve the photocatalytic degradation efficiency of toluene. And Pt/TiO2 had the highest photocatalytic activity. Cyclic vohammetry, Tafel and Mott-Schottky characterization proved that the deposition of Pt suppressed the separation of electron and hole, and enhanced the donor carrier concentration, then improved the photocatalytic activity of TiO2. |
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| Keywords: | Noble metal loading TiO2 photocatalytic activity electrochemical |
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