介孔二氧化钛的合成及其对甲基橙降解的光催化活性

以十六烷基三甲基溴化铵为模板剂,通过水解钛酸正丁酯合成了介孔二氧化钛分子筛,探讨了合成条件的影响。采用X射线粉末衍射(XRD)、红外光谱(FT-IR)、透射电子显微镜(TEM)和N2吸附-脱附等技术对介孔二氧化钛的晶相、结构、形貌、比表面积和孔径分布进行了表征。实验结果表明:得到的介孔二氧化钛分子筛的孔径为4-4.3nm,用抽提的方法去除模板剂得到的介孔二氧化钛的比表面积比焙烧的要高。以甲基橙为模型污染物,检验了所合成介孔二氧化钛的光催化性质。

Synthesis mesoporous titanium dioxide and their photocatalytic activity for decomposition of methyl orange

Using cetyl trimethyl ammonium bromide as a template,mesoporous TiO2 was prepared by hydrolyzing Ti(obu)4.Effects of experimental conditions on synthesis of mesoporous TiO2 samples were studied.The structure,crystal size,specific surface area and pore size distribution of the synthesized mesoporous TiO2 were investigated by XRD,FT-IR,TEM and N2 adsorption techniques,respectively.The experimental results show that the pore sizes of the synthesized mesoporous TiO2 range from about 4 to 4.3 nm,and the specific surface area of the mesoporous TiO2 synthesized by solvent extraction of the used template is higher than that by calcination.The photocatalytic property of the synthesized mesoporous TiO2 was tested by using methyl orange decomposition as a model reaction.