后台 - 高 传博
Xin's paper has been accepted for publication by Advanced Functional Materials (IF 12.124). Congratulations!
Title: A unique disintegration-reassembly route to mesoporous titania nanocrystalline hollow spheres with enhanced photocatalytic activity
Authors: Xin Wang, Licheng Bai, Hongyan Liu, Xuefeng Yu, Yadong Yin,* and Chuanbo Gao*
Link to the Publisher: http://onlinelibrary.wiley.com/doi/10.1002/adfm.201704208/abstract
Abstract: We report a novel disintegration-reassembly route to the synthesis of mesoporous TiO2 nanocrystalline hollow spheres with controlled crystallinity and enhanced photocatalytic activity. In this unique synthesis strategy, we demonstrate that sol-gel derived mesoporous TiO2 colloidal spheres can be disintegrated into discrete small nanoparticles that are uniformly embedded in the polymer (polystyrene, PS) matrix by surface-induced photocatalytic polymerization. Subsequent reassembly of these TiO2 nanoparticles can be induced by an annealing process after further coating of a resorcinol-formaldehyde (RF) resin, which forms self-supported hollow spheres of TiO2 at the PS/RF interface. The abundant phenolic groups on the RF resin served as anchoring sites for the TiO2 nanoparticles, thus enable the reassembly of the TiO2 nanoparticles and prevent their sintering during the thermal crystallization process. This unique disintegration-reassembly process leads to the formation of self-supported TiO2 hollow spheres with relatively large surface area, high crystallinity, and superior photocatalytic activity in dye degradation under UV light irradiation.