| 醋酸处理对TiO_2纳米薄膜光催化性能的影响 |
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| 引用本文： | 余家国,余火根,程蓓,雷鸣,赵修建.醋酸处理对TiO_2纳米薄膜光催化性能的影响[J].化学学报,2003,61(8):1271-1275. |
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| 作者姓名： | 余家国 余火根 程蓓 雷鸣 赵修建 |
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| 作者单位： | 武汉理工大学材料复合新技术国家重点实验室,武汉,430070 |
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| 基金项目： | 国家自然科学基金(Nos.50272049,50072016)、教育部优秀青年教师资助计划和高等学校骨干教师资助计划资助项目. |
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| 摘 要： | 用溶胶－凝胶方法在普通玻璃基体上制备了均匀透明的TiO_2纳米薄膜，并经 500℃煅烧2h，煅烧后的TiO_2薄膜在2 mol·L~(-1)的CH_3COOH水溶液中处理24h， 最后分别在100和500℃进行第二次热处理，醋酸处理前后的薄膜分别用UV－vis, SEM, XRD和XPS进行了表征，并用甲基橙水溶液的光催化降解评价TiO_2纳米薄膜 的光催化性能，结果发现：用醋酸处理后的TiO_2纳米薄膜的光催化活性高于处理 前薄膜的的光催化活性；而且，酸处理后经500℃热处理的TiO_2纳米薄膜的光催化 活性明显高于经100℃热处理的TiO_2纳米薄膜的光催化活性。
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| 关 键 词： | 二氧化钛 纳米相材料 溶胶-凝胶法 乙酸 光催化 扫描电子显微镜 X射线衍射分析 X射线光电子谱法 催化活性 |
| 修稿时间： | 2002年11月25 |
Effects of CH_3COOH Treatment of Photocatalytic Activity of TiO_2 Nanometer Thin Films |
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| Institution: | State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology |
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| Abstract: | The uniform transparent TiO2 nanometer thin films were prepared on soda-lime glass via sol-gel method and calcined at 500 ℃ for 2 h.The as-calcined TiO^ thin films were treated in 2 mol·L~ CH3COOH aqueous solution for 24 h, finally, the as-treated TiO2 thin films were again heat-treated at 100 and 500℃ for 0.5 h, respectively.The structures and photocatalytic activity of TiC_2 thin films before and after surface acid treatment were characterized and evaluated by UV-vis, SEM, XED, XPS and photocatalytic decoloration of methyl orange aqueous solution, respectively.lt was found that the photocatalytic activity of TiO_2 nanometer thin films was enhanced after CH_3COOH treatment. Moreover, the films showed higher photocatalytic activity at 500 ℃ than at 100 ℃ after surface acid treatment. |
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| Keywords: | TiO 2 nanometer thin films sol-gel method surface acid treatment CH 3COOH photocatalytic activity |
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