| 载银TiO_2光催化剂的合成及活性研究 |
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| 引用本文： | 王丹军,郭莉,李东升,付峰,陶明文,高利锋.载银TiO_2光催化剂的合成及活性研究[J].环境科学与技术,2010,33(4). |
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| 作者姓名： | 王丹军 郭莉 李东升 付峰 陶明文 高利锋 |
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| 作者单位： | 1. 埏安大学化学与化工学院,陕西,延安,716000
2. 埏安大学化学与化工学院,陕西,延安,716000;三峡大学机械与材料学院,湖北,宜昌,443002 |
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| 基金项目： | 国家自然科学基金，教育部新世纪优秀人才支持计划，教育部重点科研基金，陕西省教育厅专项科研基金，陕西省重点实验室重点科研基金，延安大学科研基金项目 |
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| 摘 要： | 以钛酸四正丁酯为起始原料,采用溶胶-微波法合成出TiO2纳米粒子,借助XRD、UV-Vis吸收光谱等测试手段对其进行了表征,并以罗丹明B为模型污染物考察了酸水比、微波反应温度和微波反应时间等因素对样品光催化性能的影响。结果表明,溶胶-微波法制备TiO2的最佳工艺条件为:酸水比7:1,微波反应温度150℃,反应时间8min。以最佳工艺条件下制备的TiO2为原料,采用光还原法成功制备出载Ag纳米TiO(2摩尔比为1:1),将该光催化剂置于自然光下用于采油厂工业废水的处理,太阳光下照射10h,COD去除率达到92.35%。
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| 关 键 词： | 纳米TiO2 Ag-掺杂 溶胶-微波法 光催化性能 |
Synthesis and Photocatalytic Activity of Silicotungstic Acid Sensitized Titanium Dioxide |
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| Abstract: | The silicotungstic acid sensitized nano-TiO_2 (TiO_2-SiW) photocatalysts were synthesized using silicotungstic acid as sensitizer via a hydrothermal method. As-synthesized samples were characterized by XRD and UV-vis techniques and Rhodamine B was chosen as the model pollutant to evaluate photocatalytic activity of As-synthesized samples. UV-Vis absorption spectrum indicated that TiO_2-SiW photocatalysts were extended significantly into visible region comparing to pure TiO_2. Photocatalytic experiment results indicated that TiO_2-SiW photocatalysts exhibited much greater photocatalytic activity than pure TiO_2. Photocatalytic degradation of model pollutant was treated under UV light and sunlight. Results revealed that silicotungstic acid had a great influence on the photocatalytic activity of TiO_2. |
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| Keywords: | nano-TiO_2 silicotungstic acid sensitization hydrothermal method photocatalysis |
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