摘要
采用水解沉淀法制备了白炭黑、硅藻土和蛋白土负载纳米二氧化钛复合材料。通过SEM和XRD等手段对复合材料分别进行了表征,并用罗丹明B溶液的光催化脱色率来评价复合材料的光催化性能。结果表明,在复合材料表面负载了大量的二氧化钛且主要以锐钛型为主,白炭黑、硅藻土、蛋白土复合材料表面负载的二氧化钛的平均粒径分别为14.6、25.7、22.9 nm。二氧化钛/白炭黑、二氧化钛/硅藻土、二氧化钛/蛋白土3种复合材料的最佳制备条件分别为:700℃煅烧2 h,二氧化钛负载量为30%;700℃煅烧2 h,二氧化钛负载量为20%;600℃煅烧2 h,二氧化钛负载量为20%。3种复合材料对罗丹明B溶液15 min的降解率分别达到98.6%、97.4%和87.7%。
Silica,diatomite,and opal loaded nano-sized TiO_2 composites were prepared by hydrolysis precipitation method.The composite materials were characterized by means of SEM and XRD,and photocatalytic properties thereof were evaluated by the photocatalytic decolorization rate of Rhodamine B solution.Results showed：a large amount of TiO_2 was loaded on the surface of the composite material,and the main type was anatase;and the average particle sizes of TiO_2 were 14.6 nm,25.7 nm,and 22.9 nm on the surfaces of silica,diatomite,and opal respectively.The best preparation conditions of the three kinds of composites of TiO_2/silica,TiO_2/diatomite,and TiO_2/opal were respectively：700 ℃ calcined for 2 h,and the loading of TiO_2was30%;700 ℃ calcined for 2 h,and the loading of TiO_2 was 20%;600 ℃ calcined for 2 h,and the loading of TiO_2 was 20%.The degradation rates of three kinds of composite materials on the degradation of Rhodamine B for 15 min were 98.6%,97.4%,and 87.7%,respectively.
出处
《无机盐工业》
CAS
北大核心
2016年第7期73-76,共4页
Inorganic Chemicals Industry
基金
国家自然基金(51464037)
关键词
纳米二氧化钛
复合材料
光催化
降解
nano-sized TiO2
compound material
photocatalysis
degradation
