光沉积法抑制二氧化钛晶须光活性  

Inhibition of Photocatalytic Activity of Titania Whiskers with Ultraviolet Deposition

作　　者：文高飞[1] 杨祝红[1] 李伟[1] 冯新[1] 陆小华[1] 

机构地区：[1]南京工业大学化学化工学院,江苏南京210009

出　　处：《过程工程学报》2007年第6期1159-1162,共4页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:20246002;20236010);江苏省环保科技发展基金资助项目(编号:2005001-2);中石油技术开发基金资助项目(编号:W06-03C-01-03-02)

摘　　要：报道了一种TiO2晶须光活性的钝化方法.对钝化前后TiO2晶须的稳定性、分散性进行了考察.结果表明,TiO2晶须经过光沉积方法钝化后,光活性仅为初始值的10%左右,而且其稳定性良好,即使经过超声振荡、有机溶剂清洗及高温煅烧,都不会影响其钝化效果;同时通过光学显微镜观察和沉降实验证实,其分散性也得到了明显提高.对钝化前后TiO2晶须进行XRD,BET和酸洗液的ICP分析,初步得到钝化机理是碳酸钙沉积在TiO2晶须的表面,降低了其光化学活性.A method for the inhibition of photocatalytic activity of the titania whiskers was reported in the paper. The stability and dispersion behavior of the passivated titania whiskers were studied. The results show that the photocatalytic activity of the passivated titania whiskers is only 10% of fresh titania whiskers, and the stability and dispersion behavior of the passivated titania whiskers are better than those of fresh titania whiskers. Even if calcined or washed by organic solvent and inorganic solvent in ultrasonic cleaner, the photocatalytic activity of the passivated titania whiskers cannot be changed. XRD, SEM and ICP techniques were used to characterize the passivated titania whiskers. The results suggest that the main reason of the inhibition is calcium carbonate deposition on the surface of titania whiskers.

关 键 词：TiO2晶须 光活性 抑制 稳定性 分散性 

分 类 号：O643[理学—物理化学]