Synthesis, characterization and photoactivity of bi-crystalline mesoporous TiO2  

作　　者：Dongthanh NGUYEN Wei WANG Haibo LONG Hongqiang RU 

机构地区：[1]Key Laboratory for Anisotropy and Texture of Materials of Ministry of Education (ATM), Northeastern University Shenyang 110819, China [2]School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China

出　　处：《Frontiers of Materials Science》2016年第1期23-30,共8页材料学前沿（英文版）

基　　金：Acknowledgements This work was supported by the National Natural Science Foundation of China （Grant Nos. 21201030, 21471026 and 51272039）, the Fundamental Research Funds for the Central Universities （N141005001, L1502020 and N130810003） and the Liaoning Province Innovation Funds （Grant No. 2014020030）.

摘　　要：Mesoporous titania （meso-TiO2） has received extensive attention owing to its versatile potential applications. This paper reports a low-temperature templating approach for the fabrication of meso-TiO2 using the peroxo titanic acid （PTA） sol as precursor and Pluronic P123 as nonionic template. The TGA, XRD, N2 sorption, FE-SEM and HRTEM were used to characterize the obtained samples. The results showed that meso-TiO2 with high surface area up to 163 m2.g^-1 and large pore volume of 0.65 cm3.^-1 can be obtained. The mesopore sizes can be varied between 13 and 20 nm via this synthesis approach. The amount of P123 and the calcination conditions were found to have great influence on the mesoporous and crystalline structures of meso-TiO2. The photocatalytic activity testing clearly shows that the high surface area and bi-crystallinity phases of meso-TiO2 play important roles in enhancing photocatalytic properties of meso-TiO2 in photo-decomposing Rhodamine B in water.Mesoporous titania （meso-TiO2） has received extensive attention owing to its versatile potential applications. This paper reports a low-temperature templating approach for the fabrication of meso-TiO2 using the peroxo titanic acid （PTA） sol as precursor and Pluronic P123 as nonionic template. The TGA, XRD, N2 sorption, FE-SEM and HRTEM were used to characterize the obtained samples. The results showed that meso-TiO2 with high surface area up to 163 m2.g^-1 and large pore volume of 0.65 cm3.^-1 can be obtained. The mesopore sizes can be varied between 13 and 20 nm via this synthesis approach. The amount of P123 and the calcination conditions were found to have great influence on the mesoporous and crystalline structures of meso-TiO2. The photocatalytic activity testing clearly shows that the high surface area and bi-crystallinity phases of meso-TiO2 play important roles in enhancing photocatalytic properties of meso-TiO2 in photo-decomposing Rhodamine B in water.

关 键 词：surfactant templating MESOPORE bi-crystallinity TITANIA 

分 类 号：TQ134.1[化学工程—无机化工] O643.36[理学—物理化学]