Spherical Polyelectrolyte Brush Nanoreactor:Preparation of Hollow TiO_(2) Nanospheres and Characterization by Small Angle X-Ray Scattering  

作　　者：Yu-Hua Zhang Zi-Yu Zhang Xin Liu En-Guang Ma Jiang-Tao Guo Li Li Xu-Hong Guo 

机构地区：[1]State Key Laboratory of Chemical Engineering,East China University of Science and Technology,Shanghai,200237,China [2]Shandong Provincial Key Laboratory of Monocrystalline Silicon Semiconductor Materials and Technology,College of Chemistry and Chemical Engineering,Dezhou University,Dezhou,253023,China [3]Institute of Bast Fiber Crops&Center of Southern Economic Crops,Chinese Academy of Agricultural Sciences,Changsha,410205,China

出　　处：《Chinese Journal of Polymer Science》2024年第9期1393-1400,I0009,共9页高分子科学（英文版）

基　　金：funded by the National Key Research and Development Program of China,grant number 2023YFD1700303.

摘　　要：Titanium dioxide(TiO_(2))hollow nanoparticles present significant potential for photocatalytic applications while their straightforward preparation with precise structure control is still challenging.This work reports the approach to preparing tunable hollow TiO_(2) nanospheres by utilization of spherical polyelectrolyte brushes(SPB)as nanoreactors and templates.During the preparation,the evolution of the structure was characterized by small angle X-ray scattering(SAXS),and in combination with dynamic light scattering and transmission electron microscopy.The formation of TiO_(2) shell within the brush(SPB@TiO_(2))is confirmed by the significant increase of the electron density,and its internal structure has been analyzed by fitting SAXS data,which can be influenced by Titanium precursors and ammonia concentration.After calcining SPB@TiO_(2) in a muffle furnace,hollow TiO_(2) nanospheres are produced,and their transition to the anatase crystal form is triggered,as confirmed by X-ray diffraction analysis.Utilizing the advantages of their hollow structure,these TiO_(2) nanospheres exhibit exceptional catalytic degradation efficiency of methylene blue(MB),tetracycline(TC),and 2,4-dichlorophenoxyacetic acid(2,4-D),and also demonstrate excellent recyclability.

关 键 词：Spherical polyelectrolyte brush NANOREACTOR Hollow titanium dioxide X-ray scattering 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TQ134.11[化学工程—无机化工]