摘要
本文以TiCl4 为前体 ,采用沉淀法、气相沉积法和溶胶 凝胶法分别制备了TiO2 光催化剂 ,比较了它们在十二烷基苯磺酸钠 (SDBS)光解反应中的催化活性。结果表明 ,以日光灯作光源时 ,气相沉积法获得的催化剂效果最好 ;以 5 0 0W紫外线高压汞灯作光源时 ,沉淀法获得的催化剂活性最高 ,10 0ml初始化学需氧量 (COD)为381mg/L的SDBS溶液 ,在 0 .1g催化剂作用下 ,室温光照 8h ,COD去除率可达 98 8%。在沉淀法制备的催化剂上 。
Nanometer TiO 2 was prepared with TiCl 4 as precursor by methods of precipitation,chemical vapor deposition and sol gel,respectively.Their catalytic activities in photocatalytic degradation of Sodium Dodecyl Benzene Sulfonate (SDBS) were measured.The results showed that the catalyst prepared by chemical vapor deposition has the highest activity under the daylight lamp.And when with a high pressure ultraviolet radiation mercuric lamp having 500W power,the sample acquired from precipitation exhibits the best activity.And with 0.1g catalyst,the chemical oxygen demand(COD) of 100ml SDBS solution with a primitive COD of 381mg/L is removed 98.8%.When catalysed by the catalyst prepared by precipitation,the photocatalytic degradation reaction follows first order kinetics.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2001年第6期653-656,共4页
Chemical Research and Application
