摘要
采用溶胶-凝胶和水蒸气活化热处理技术制备了介孔TiO2纤维,考察了各种因素对介孔TiO2纤维光催化活性的影响,并对介孔TiO2纤维结构进行了表征。介孔TiO2纤维的最佳制备条件:n(TBOT)∶n(C6H10O3)∶n(H2O)∶n(C3H8O)=1∶0.4∶2.0∶16,搅拌时间80min,Si与Ti的摩尔比为0.15,采用分段程序升温工艺,活化温度为700℃。所得介孔TiO2纤维比表面积为127.7m2/g,最可几孔径为7.3nm,具有极高的热稳定性及抗晶型转变能力,反应时间75min时活性艳红X-3B降解率为99.3%。
Mesoporous TiO2 fiber was prepared by sol-gel and thermal activation process with vapor. The factors affecting the photocatalytic activity of mesoporous TiO2 fiber were studied. And the structure of mesoporous TiO2 fiber was characterized. The optimum conditions for mesoporous TiO2 fiber preparation are as follows: n(TBOT) : n(C6H10O3) : n(H20) : n(C3H8O) =1:0.4: 2.0: 16, stirring time 80 min, mol ratio of Si to Ti 0. 15, activation in stage programmed temperature process, activation temperature 700 ℃. The BET specific surface area of the mesoporous TiO2 fiber is 127.7 mE/g and the most probable pore diameter is 7.3 nm. The material has extremely high thermal stability and resistant capability to crystalline form transformation. When the reaction time is 75 min, the degradation rate of reactive brilliant red X-3B is 99.3%.
出处
《化工环保》
CAS
CSCD
北大核心
2007年第3期204-208,共5页
Environmental Protection of Chemical Industry
基金
国家863计划资助项目(2003AA601060)
山东大学校青年基金项目(11440053187025)
关键词
介孔材料
二氧化钛
纤维
光催化
活化
活性艳红
降解
mesoporous material
titanium dioxide
fiber
photocatalysis
activation
reactive brilliant red
degradation