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

文献类型： 外文期刊

第一作者： Zhang, Yu-Hua

作者： Zhang, Yu-Hua;Zhang, Zi-Yu;Liu, Xin;Guo, Jiang-Tao;Li, Li;Guo, Xu-Hong;Ma, En-Guang;Guo, Xu-Hong;Guo, Xu-Hong

作者机构：

关键词： Spherical polyelectrolyte brush; Nanoreactor; Hollow titanium dioxide; X-ray scattering

期刊名称：CHINESE JOURNAL OF POLYMER SCIENCE （ 影响因子：4.1； 五年影响因子：3.3 ）

ISSN： 0256-7679

年卷期： 2024 年

页码：

收录情况： SCI

摘要： 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 efficiency of methylene blue (MB), tetracycline (TC), and 2,4-dichlorophenoxyacetic acid (2,4-D), and also demonstrate excellent recyclability.

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