| H4SiW12O40/TiO2/SiO2复合光催化剂的制备及性能研究 |
| |
| 引用本文： | 白波,董岁明. H4SiW12O40/TiO2/SiO2复合光催化剂的制备及性能研究[J]. 化学研究与应用, 2006, 18(1): 35-39 |
| |
| 作者姓名： | 白波 董岁明 |
| |
| 作者单位： | 长安大学环境科学与工程学院化工系,陕西,西安,710054;长安大学环境科学与工程学院化工系,陕西,西安,710054 |
| |
| 摘 要： | 溶胶-凝胶法制备了TiO2/S iO2光催化剂,利用所得TiO2/S iO2光催化剂为基体,浸渍烧结法制备了H4S iW12O40/TiO2/S iO2表面负载修饰型复合光催化剂。TG-DSC、XRD、SEM、BET对催化剂的物化结构进行了表征,分析了TiO2和H4S iW12O40催化活性组分在S iO2载体表面上的键联机理。光催化性能测试是以低浓度酸性品红染料的水溶液为降解目标物,试验结果表明H4S iW12O40的负载修饰可以改进TiO2/S iO2光催化剂的催化活性,酸性品红的降解效率最高可以增加45%。
|
| 关 键 词： | 二氧化钛 二氧化硅 杂多酸 负载 光催化剂 |
| 文章编号： | 1004-1656（2006）01-0035-05 |
| 收稿时间： | 2004-11-29 |
| 修稿时间： | 2005-03-29 |
Preparation and photocatalytic performance of H4SiW12O40/TiO2/SiO2 composites |
| |
| BAI Bo,DONG Sui-ming. Preparation and photocatalytic performance of H4SiW12O40/TiO2/SiO2 composites[J]. Chemical Research and Application, 2006, 18(1): 35-39 |
| |
| Authors: | BAI Bo DONG Sui-ming |
| |
| Abstract: | TiO_2/SiO_2 composite photocatalyst was first prepared by sol-gel route.Then,a novel photocatalyst with supported and surface modification,H_4SiW_(12)O_(40)/TiO_2/SiO_2,was synthesized by successive impregnation method through using resultant TiO_2/SiO_2 product as matrix.The physico-chemical structures of final photocatalysts of H_4SiW_(12)O_(40)/TiO_2/SiO_2 were characterized by TG-DSC,XRD,SEM and BET.The corresponding mechanisms of bond-conjunction on the surface of H_4SiW_(12)O_(40)/TiO_2/SiO_2 catalyst were discussed.The test of photocatalytical performance was carried out for the degradation of model acid fuchsine dyes in aqueous.The results showed that the catalysis activity of TiO_2/SiO_2 photocatalysts could be augmented by modification of H_4SiW_(12)O_(40) compound,and the highest enhancement of degradation efficiency of model acid fuchsine dyes in aqueous could be 45%. |
| |
| Keywords: | titanium dioxide silica polyoxometalates supported photocatalyst |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
