摘要
以聚甲基丙烯酸甲酯微球为模板,分别以钛酸四丁酯和四异丙醇钛为钛源,通过溶胶-凝胶法辅助模板法制得TiO2纳米微球前驱体,并用程序升温控制其焙烧温度,最终成功制得了具有三维有序介孔/大孔复合结构的TiO2微球.以罗丹明B(RhB)为模型污染物,探索了以不同钛源制备得到的介孔/大孔复合TiO2微球的光催化性能;并采用XRD、SEM、TEM、UV-vis DRS、比表面积测试、光催化性能测试等对样品的晶粒尺寸、物相、形貌、光吸收、比表面积及性能等进行了分析.结果表明,运用溶胶凝胶法辅助模板法能够合成结晶度高、形貌规整、比表面积大、光催化活性良好的锐钛矿相TiO2微球.
Three-dimensionally ordered mesoporous /macroporous TiO2 microspheres were synthesized through solgel assisted template method using the self-made poly-( methyl methacrylate)( PMMA) microspheres as hard template,and two kinds of titanium source,such as titanium isopropoxide and tetrabutyl titanate,were used as metal precursor. On the basis of characterization results of XRD,SEM,TEM,UV-vis DRS and N2 adsorption /desorption,the morphology,optical absorption,surface area,pore distribution and catalytic activity of the as-prepared samples were systemically investigated. The characterization results reveal that the as-prepared TiO2 samples possess uniform microsphere structure,large surface area and high crystallinity. The obtained mesoporous /macroporous microspheres show the enhanced photocatalytic activity,which is found to be 90% degradation efficiency of RhB with 10 mg /L concentration under UV light irradiation for 120 min.
出处
《分子催化》
EI
CAS
CSCD
北大核心
2014年第4期359-366,共8页
Journal of Molecular Catalysis(China)
基金
国家自然科学基金项目(21303130)
中央高校基本科研业务费专项基金支持
陕西省自然科学基金(2014JQ2066)
