摘要
采用溶胶-凝胶法制备纳米WO3-TiO2复合粉末,并通过X射线衍射(XRD)和扫描电镜(SEM)考查了WO3-TiO2复合粉末和的构参数及其表面形貌;对浓度为10mg／L的甲基橙溶液进行光催化,考察了不同条件时其光催化降解的影响。结果表明,在一定条件下,甲基橙光降解率先随纳米WO3-TiO2复合粉末投入量升高,但有一最佳值;改变光照时间,甲基橙光降解率先随光照时间增加而升高,也存在最佳值;最佳量掺杂WO3制备下的纳米WO3-TiO2复合粉末光催化剂催化活性最高,对甲基橙溶液光降解率可达94．8％。
Nanomter WO3 - TiO2 composite photocatalyst were prepared by sol-gel method. X -ray reflection diffraction (XRD) spectra and scanning electron microscope (SEM) have Been used to investigate the structural properties and surface morphology of the composite nanopowder. Photocatalytic degradation experiments for 10mg/L Methyl orange solution were performed to inspect the influence of different preparation conditions on its photocatalytic activity. Methyl orange solution photocatalytic degradation has been heightened with the augment of the WO3 -TiO2 Nanopowder ,but the quality of the Nanopowder has a right numerical value in photocatalytic degradation ; Changing the time, Methyl orange solution photocatalytic degradation has been heightened with the extended time,but the photocatalytic degradation ratio of the Methyl orange solution has a right numerical value with prolonged time ; The resultes showed that the composite WO3 -TiO2 Nanopowder with the highest photocatalytic activity was obtained as the doping amount of钨酸钠= 3% and the highest photocatalytic activity was 94. 8%.
出处
《宿州学院学报》
2006年第5期79-82,共4页
Journal of Suzhou University
基金
安徽省高校"十五"拔尖人才基金项目安徽省教育厅自然科学重点科研项目(2005KJ002ZD)。
关键词
光催化
甲基橙
二氧化钛
三氧化钨
复合光催化剂
photocatalysis
Methyl Orange
titanium dioxide
tungsten oxide
composite photocatalyst
