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以钦酸异丙醋为钦源,利用三嵌段共聚物EO106PO70EO106(F127)修饰的溶胶-凝胶法合成单分散介孔TiO2微球。利用小角和广角X射线衍射、N2吸附-脱附、透射电镜、场发射扫描电镜、紫外-可见光漫反射技术对样品进行表征。以亚甲基蓝(MB)为目标降解物,在紫外光照射下,评价介孔TiO2微球的光催化性能。结果表明:F127加入量为14%,450℃热处理制得的单分散介孔微球由锐钛矿TiO2纳米颗粒(10 nm)聚积而成,介孔孔道均匀有序,比表面积为158.2m2/g,孔容为0.361 cm3/g,最可几孔径为9.6 nm。单分散介孔TiO2微球的活性优于P25,光催化反应3 min时对MB溶液的降解率达100%。
Abstract：The monodisperse mesoporous TiO2 microspheres were prepared by a triblock copolymer(EO106PO70EO106(F127))modified sol-gel method with titanium(Ⅳ) isopropoxide as a titanium source.The prepared sample was characterized by X-ray diffraction,N2 adsorption-desorption,transmission electron microscopy,field emission scanning electron microscopy and UV-visible diffuse reflectance spectroscopy,respectively.The photocatalytic activities of mesoporous TiO2 microspheres were characterized with methylene blue(MB) solution as a target pollutant under ultraviolet light.The results show that the TiO2 microspheres prepared with14%concentration of F127 and sintered at 450 ℃ are formed via the accumulation of the nanoparticles(anatase,10 nm),and the specific surface areas,pore volume and pore diameter are 158.236 m2/g,0.361 cm3/g and 9.6 nm,respectively.The degradation rate of MB is almost 100%within 30 min,and the mesoporous TiO2 microspheres exhibit a greater photocatalytic activity,compared to commercial P25.
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基本信息:
DOI：10.14062/j.issn.0454-5648.2016.01.12
中图分类号:TQ134.11
引用信息:
[1]杨立荣,刘志刚,张丽,等.单分散介孔TiO_2微球的溶胶-凝胶法制备及其光催化性能[J].硅酸盐学报,2016,44(01):75-80.DOI:10.14062/j.issn.0454-5648.2016.01.12.
基金信息:
河北省自然科学基金项目(E2015209317)
2015-12-23
2015-12-23
2015-12-23