Photocatalytic activity of CU2O/TiO2, Bi2O3/TiO2 and ZnMn2O4/TiO2 heterojunctions
Photocatalytic activity of CU2O/TiO2, Bi2O3/TiO2 and ZnMn2O4/TiO2 heterojunctions
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DOI：
10.1016/j.cattod.2005.03.038
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发表时间：
2005-04-15
期刊：
影响因子：
5.3
通讯作者：
Weber, JV
中科院分区：
文献类型：
--
作者：
Bessekhouad, Y;Robert, D;Weber, JV
研究了Cu2O/TiO2、Bi2O3/TiO2和ZnMn2O4/TiO2异质结在水净化技术中的潜在应用及其在可见光下诱导氧化过程的能力。紫外-可见光谱分析表明，基于结的Cu2O、Bi2O3和ZnMn2O4能够吸收大部分可见光（分别达到650、460和1000 nm）。在可见光下进行的Cu2O/TiO2和Bi2O3/TiO2的光催化实验证实了这一事实。在紫外-可见光照下进行光催化实验时，观察到当两个半导体都被激发时可以发生的部分电荷重组。实验中污染物分别为橙ⅱ、4-羟基苯甲酸和苯甲酰胺。发现结的光活性强烈依赖于底物。讨论了在每种情况下观察到的不同现象。(c) 2005 Elsevier B.V.版权所有
Cu2O/TiO2, Bi2O3/TiO2 and ZnMn2O4/TiO2 heterojunctions were studied for potential applications in water decontamination technology and their capacity to induce an oxidation process under VIS light. UV-vis spectroscopy analysis showed that the junctions-based Cu2O, Bi2O3 and ZnMn2O4 are able to absorb a large part of visible light (respectively, up to 650, 460 and 1000 nm). This fact was confirmed in the case of Cu2O/TiO2 and Bi2O3/TiO2 by photocatalytic experiments performed under visible light. A part of the charge recombination that can take place when both semiconductors are excited was observed when a photocatalytic experiment was performed under UV-vis illumination. Orange II, 4-hydroxybenzoic and benzamide were used as pollutants in the experiment. Photoactivity of the junctions was found to be strongly dependent on the substrate. The different phenomena that were observed in each case are discussed. (c) 2005 Elsevier B.V. All rights reserved.