Facile and controllable preparation of mesoporous TiO2 using poly（ethylene glycol） as structure-directing agent and peroxotitanic acid as precursor

作     者：Dongthanh NGUYEN Wei WANG Haibo LONG Hongqiang RU 

作者机构：Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education) School of Materials Science and Engineering Northeastern University Shenyang 110819 China 

出 版 物：《Frontiers of Materials Science》 (材料学前沿（英文版）)

年 卷 期：2016年第10卷第4期

页      面：405-412页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：国家自然科学基金 the Fundamental Research Funds for the Central Universities the Liaoning Province Innovation Funds 

主　　题：sol-gel preparation mesoporous titania poly(ethylene glycol) 

摘      要：This work demonstrated that mesoporous TiO= （meso-TiO2） with con- trollable mesoporous and crystalline structures can be facilely prepared by using poly （ethylene glycol） （PEG） as structure-directing （SD） agent and peroxotitanic acid （PTA） as precursor. Meso-TiO2 with high specific surface area （157 m2.g-1）, pore volume （0.45 cm3.g-1） and large mesopore size of 13.9 nm can be obtained after calcination at 450℃. Such meso-TiO2 also shows relatively high thermal stability. BET surface area still reaches 114 m2-g-1 after calcination at 550℃. In the synthesis and calcination process, PEG that plays multiple and important roles in delivering thermally stable and tunable mesoporous and crystalline structures shows to be a suitable low-cost SD agent for the controllable preparation of nanocrystalline meso-TiO2. The photocataiytic activity tests show that both high surface area and bi-crystallinity of obtained meso-TiO2 are important in enhancing the performance in photo-decomposing Rhodamine B in water.