摘要
以控制中和水解法制备的锐钛矿型纳米TiO2为原料,在不同体系中,通过控制反应初始n(Ag)∶n(Ti),用直接光催化反应的方法制备了纳米Ag/TiO2复合光催化剂。并且对产品进行了表征和分析。结果表明,Ag的改性能显著提高光催化效率,乙醇有机溶剂体系和水体系中制得的Ag/TiO2复合光催化剂的光催化活性相差不大,最佳n(Ag)∶n(Ti)为0.1%。同时与UV光相比在室内自然光作用下得到的Ag/TiO2复合光催化剂表现出更好的活性,40 min甲基橙光催化降解率比纳米TiO2高约44%。
Anatase TiO2 nanoparticles were prepared with TICl4 as raw material by the method of controlled hydrolysis. Nano-Ag/TiO2 photocatalyst was prepared by controlling initial Ag/Ti molar ratio in directly photocatalytic method. Methyl orange was employed as the target pollutant. The photocatalytie activity of nano-TiO2 and nano-Ag/TiO2 photocatalyst was invesgated. The results showed that the deposit of Ag can obviously increase the photocatalytic activity. The difference of photocatalytic activity prepared in ETOH and water is not big.The best initial molar ratio of Ag/Ti is 0. 1% respectirely. Expremential also showed the composited photocatalyst prepared by indoor nature light has bet- ter photocatalytic activity than by UV light. The photocatatytic degradation rate is better than pure nano-TiO2 about 44%.
出处
《化工科技》
CAS
2009年第2期20-23,共4页
Science & Technology in Chemical Industry
基金
湖南城市学院2007年科技计划资助项目(07B009)
