Template-Directed Fabrication of Anatase TiO2 Hollow Nanoparticles and Their Application in Photocatalytic Degradation of Methyl Orange  

作　　者：Jie Chang Wenjian Zhang Chunyan Hong 

机构地区：[1]CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China

出　　处：《Chinese Journal of Chemistry》2017年第6期1016-1022,共7页中国化学（英文版）

基　　金：The financial support from the National Natural Science Foundation of China （Nos. 21525420 and 21374107） and China Postdoctoral Science Foundation （BH2060000011） is gratefully acknowledged.

摘　　要：Polymerization-induced self-assembly （PISA） was used to fabricate polymeric nanoparticles via reversible ad- dition-fragmentation chain transfer （RAFT） dispersion polymerization of benzyl methacrylate （BzMA） using di- block copolymer poly（glycerol monomethacrytate）-block-poly（2-dimethylaminoetbyl methacrylate） （PGMMA- PDMAEMA-CTA） as the macro RAFT agent. The dispersion of polymeric nanoparticles with a final concentration of about 210 mg/g （solid content of 21%） was obtained via this efficient method （PISA）. The resultant polymeric nanoparticles consisting of corona-shell-core three layers with weak polyelectrolyte PDMAEMA as the shell were used as sacrificial template to fabricate TiO2 hollow nanoparticles. The negatively charged titanium precursor was absorbed into the PDMAEMA shell via the electrostatic interaction, and hydrolyzed to form polymer/TiO2 hybrid nanoparticles. Anatase TiO2 hollow nanoparticles were formed after removing the polymeric templates by calcina- tion at 550 ℃. The experiments of photocatalytic degradation of methyl orange showed that the resultant anatase TiO2 hollow nanoparticles had high photocatalytic activity and good reusability.Polymerization-induced self-assembly （PISA） was used to fabricate polymeric nanoparticles via reversible ad- dition-fragmentation chain transfer （RAFT） dispersion polymerization of benzyl methacrylate （BzMA） using di- block copolymer poly（glycerol monomethacrytate）-block-poly（2-dimethylaminoetbyl methacrylate） （PGMMA- PDMAEMA-CTA） as the macro RAFT agent. The dispersion of polymeric nanoparticles with a final concentration of about 210 mg/g （solid content of 21%） was obtained via this efficient method （PISA）. The resultant polymeric nanoparticles consisting of corona-shell-core three layers with weak polyelectrolyte PDMAEMA as the shell were used as sacrificial template to fabricate TiO2 hollow nanoparticles. The negatively charged titanium precursor was absorbed into the PDMAEMA shell via the electrostatic interaction, and hydrolyzed to form polymer/TiO2 hybrid nanoparticles. Anatase TiO2 hollow nanoparticles were formed after removing the polymeric templates by calcina- tion at 550 ℃. The experiments of photocatalytic degradation of methyl orange showed that the resultant anatase TiO2 hollow nanoparticles had high photocatalytic activity and good reusability.

关 键 词：polymerization-induced self-assembly RAFT dispersion polymerization TiO2 hollow nanoparticles 

分 类 号：O531.5[理学—等离子体物理] X703[理学—物理]