Large-sized nano-TiO2/SiO2 mesoporous nanofilm-constructed macroporous photocatalysts with excellent photocatalytic performance  

作　　者：Zhiyu ZHANG Lixia HU Hui ZHANG Liping YU Yunxiao LIANG 

机构地区：[1]State Key Laboratory Base of Novel Functional Materials and Preparation Science,School of Materials Science and Chemical Engineering,Ningbo University,Ningbo 315211,China

出　　处：《Frontiers of Materials Science》2020年第2期163-176,共14页材料学前沿（英文版）

基　　金：This work was financially supported by the Science and Technology Benefiting Projects of Ningbo(Grant No.2017C50033),the Public Projects of Zhejiang Province(Grant No.LGG19E020002),and the KC Wong Happiness Fund in Ningbo University.

摘　　要：Novel large-sized mesoporous nanofilm-constructed macroporous SiO2(LMNCMS)with two sets of well-defined 3D continuous pass-through macropores(pore size of 0.5-1.0 um,wall thickness of 40-50 nm)was prepared through a dual-templating approach,and used as an advanced support for TiO2 nanocrystalline photocatalyst.The structural and optical properties of the as-prepared materials were investigated by various characterization techniques in order to explore the connections between catalysts'features and catalytic performance.The photocatalytic activities were evaluated by degradations of methylene blue(MB)and phenol under the simulated sunlight irradiation.To gain insight into the impact of preparation and operation conditions on photocatalytic degradation processes,experiments were conducted at wide ranges of the TiO2 loading content,calcination temperature,solution pH,and photocatalyst dosage.Nano-TiO2/LMNCMS exhibited high photocatalytic activity and stability.Rapid matter transport,good access ibility of pollutants to TiO2 and high light harvesting could mainly account for the superior photocatalytic performance.The trapping experiments were performed to identify the main reactive species in the catalytic reactions.

关 键 词：mesoporous nanofilm hierarchical porous silica templating fabrication NANO-TIO2 degradation of organic pollutant 

分 类 号：O64[理学—物理化学]