孔径可控的介孔TiO_2纳米球的溶剂热合成

Solvothermal Synthesis of Mesoporous TiO_2 Spheres with Controllable Pore Size

以具有微孔结构的乙二醇钛(TG)为前驱体,采用无模板法制备了一系列单分散的介孔TiO2纳米球.通过溶剂热处理,微孔前驱体TG原位水解直接转化为具有介孔结构的TiO2纳米球.通过X射线粉末衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、傅里叶变换红外光谱(FTIR)及氮气吸附-脱附等对产物进行了表征.测试结果表明,产物具有高结晶性、均一的形貌、可调的孔径和比表面积.

We report a facile template-free method to fabricate monodisperse mesoporous TiO2 spheres using microporous titanium glycolates（TG） as precursor.By solvothermal treatment,microporous TG can be directly converted into mesoporous TiO2 spheres via in-situ hydrolysis.The products were characterized by XRD,SEM,TEM,FTIR and nitrogen absorption.The results show that the products exhibit high crystallinity,uniform morphology and tunable pore size.These integrated features would make the as-obtained mesoporous TiO2 materials have attractive applications in areas of environmental purification,energy conversion and storage.