首页|Spherical Polyelectrolyte Brush Nanoreactor:Preparation of Hollow TiO2 Nanospheres and Characterization by Small Angle X-Ray Scattering

Spherical Polyelectrolyte Brush Nanoreactor:Preparation of Hollow TiO2 Nanospheres and Characterization by Small Angle X-Ray Scattering

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Titanium dioxide(TiO2)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 TiO2 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 TiO2 shell within the brush(SPB@TiO2)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@TiO2 in a muffle furnace,hollow TiO2 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 TiO2 nanospheres exhibit exceptional catalytic degradation efficien-cy of methylene blue(MB),tetracycline(TC),and 2,4-dichlorophenoxyacetic acid(2,4-D),and also demonstrate excellent recyclability.

Spherical polyelectrolyte brushNanoreactorHollow titanium dioxideX-ray scattering

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

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State Key Laboratory of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China

Shandong Provincial Key Laboratory of Monocrystalline Silicon Semiconductor Materials and Technology,College of Chemistry and Chemical Engineering,Dezhou University,Dezhou 253023,China

State Key Laboratory of Chemical Engineering,East China University of Science and Technology,Shanghai200237,China

Institute of Bast Fiber Crops & Center of Southern Economic Crops,Chinese Academy of Agricultural Sciences,Changsha 410205,China

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National Key Research and Development Program of China

2023YFD1700303

2024

高分子科学(英文版)
中国化学会 中国科学院化学研究所

高分子科学(英文版)

CSTPCD
影响因子:0.721
ISSN:0256-7679
年,卷(期):2024.42(9)