| WO3/TiO2复合半导体的光催化性能研究 |
| 摘要点击 1292 全文点击 3636 投稿时间：1998-11-19 |
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| 中文关键词 光催化 二氧化钛 三氧化钨 复合半导体 亚甲基蓝 |
| 英文关键词 photocatalysis titanium dioxide tungsten oxide coupled semiconductor methylene blue |
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| 中文摘要 |
| 采用Sol-Gel法制备WO3/TiO2纳米粉末。以高压汞灯为光源,亚甲基蓝溶液的光催化降解为模型反应。结果表明:掺入WO3摩尔比为2%时,WO3/TiO2的光活性最高;随着热处理温度升高,WO3/TiO2光活性增强;WO3/TiO2的Langmuir动力学常数为0.01036mmol/(L·min)-1;紫外-可见吸收光谱及离子色谱分析结果表明:与TiO2相比,WO3/TiO2为催化剂时亚甲基蓝分子的分解程度更高。 |
| 英文摘要 |
| WO3/TiO2 Coupled nanopowder was prepared by solgel process.Being a model reaction,the photocatalytic degradation of methylene blue in TiO2 and WO3/TiO2 nanopowder suspension irradiated by high pressure mercury lamp was investigated.As a results,the addition of WO3 to TiO2 greatly enhanced its photocatalytic behavior,and the optimum concentration of WO3 on TiO2 was 2%(molar fraction)and the photocatalytic activity was enhanced with a rise of the calcination temperature.The results showed the Langmuir kinetics constants of WO3/TiO2 was 0.01036 mmol/(L·min)-1.UVvis absorption spectra and Ion Chromatography analyses showed that WO3/TiO2 made methylene blue more easily mineralized,compared with TiO2. |
