| 后处理对TiO2纳米薄膜的表面结构和光催化活性的影响 |
| Effects of Post-treatment on Photocatalytic Activity and Surface Structures of TiO2 Nanometer Thin Films |
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| 摘要: 半导体TiO2光催化材料对环境中各种污染物的明显去除效果已引起人们的广泛关注.在普通钠钙玻璃表面涂制高光催化活性的TiO2纳米薄膜,制成环保建筑材料,不仅可以自洁玻璃表面,而且可以用于净化空气、处理废水等. |
| 关键词: 溶胶-凝胶法 TiO2纳米薄膜 后处理 光催化活性 |
| 基金项目: 国家自然科学基金资助项目(No.50272049;50072016);教育部优秀青年教师资助计划(No.教人司2002350#);教育部留学回国人员科研启动基金资助项目(No.教外司留200314#) |
| Abstract: The TiO2 thin films were prepared on the surface of soda-lime glass via sol-gel method, and calcined at 500℃ for 2h. The as-calcined TiO2 thin films were treated in 1mol·L-1 H2SO4 aqueous solution for 24h, after that the thin films were heat-treated at 100℃ and 500℃ for 0.5h, respectively. The structures and photocatalytic activity of TiO2 thin films before and after surface acid treatment were characterized and evaluated by UV-Vis, SEM, TEM and XPS and photocatalytic decoloration of methyl orange aqueous solution, respectively. It was found that after TiO2 thin films were treated in H2SO4 solution and calcined at 100℃ and 500℃, the content of sodium ions in the TiO2 thin films decreases and the photocatalytic activity of the thin films increases obviously. Moreover, the films show the highest photocatalytic activity at 500℃. |
| Keywords: sol-gel methods TiO2 nanometer thin films post-treatment photocatalytic activity |
| 投稿时间：2003-03-04 修订日期：2003-04-21 |
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| 余火根,余家国,程蓓,赵修建.后处理对TiO2纳米薄膜的表面结构和光催化活性的影响[J].无机化学学报,2003,19(8):873-878. |
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