制备工艺条件对纳米Ti1-xSxO2 薄膜光催化活性的影响

来源期刊:中南大学学报(自然科学版)2008年第6期

论文作者:许珂敬 尚超峰 李 芳

文章页码:1229 - 1232

关键词:纳米S-TiO2薄膜;掺杂;溶胶-凝胶-浸渍提拉法;光催化活性

Key words:nano S-TiO2 film; doping; sol-gel-dipping process; photocatalytic activity

摘    要:以硫脲为S的源物质,以钛酸丁酯为TiO2的前驱体,以蜂窝陶瓷为载体,采用改进的溶胶-凝胶-浸渍提拉法制备Ti1-xSxO2薄膜,探讨热处理温度、S掺杂量及涂膜等工艺条件对Ti1-xSxO2薄膜的光催化活性的影响。研究结果表明:掺硫TiO2光催化剂在可见光区的吸收强度增大;采用溶胶-凝胶-浸渍提拉法制备Ti1-xSxO2光催化剂的最佳工艺条件是:硫脲与Ti(OBu)4摩尔比为3:1,煅烧温度为600 ℃,涂膜层数为6。在最佳工艺条件下制备的Ti1-xSxO2纳米薄膜对亚甲基蓝的降解率可达100%。

Abstract: With thiourea as the source substance of S, with Titanium tetrabutoxide (Ti(OC4H9)4 as the precursor of titanium dioxide and with honeycomb ceramics as carriers, S-TiO2 films were prepared by a modified sol-gel-dipping process. Effects of the heat treating temperature, the amount of sulfur-doping and the technological conditions of coating films on the photocatalytic activity of Ti1-xSxO2 films were discussed. The results show that the adsorption activity of TiO2 photocatalysts with suitable sulfur-doping in visible light increases. The optimal technological conditions of Ti1-xSxO2 photocatalysts prepared by sol-gel-dipping process are as follows: The molar ratio of thiourea and titanium tetrabutoxide is 3:1, the calcinations temperature is 600 ℃ and the times of coating film is 6. The degradation of Ti1-xSxO2 nano-film prepared at the optical technological conditions for methylene blue may reach 100%.

基金信息:国家“863”计划课题成果推广资助项目

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