文献类型：期刊文献

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

作者：Zhang, Yu-Hua[1];Zhang, Zi-Yu[1];Liu, Xin[1];Ma, En-Guang[2];Guo, Jiang-Tao[1];Li, Li[1];Guo, Xu-Hong[1,3,4]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Dezhou Univ, Coll Chem & Chem Engn, Shandong Prov Key Lab Monocrystalline Silicon Semi, Dezhou 253023, Peoples R China;[3]Chinese Acad Agr Sci, Inst Bast Fiber Crops, Changsha 410205, Peoples R China;[4]Chinese Acad Agr Sci, Ctr Southern Econ Crops, Changsha 410205, Peoples R China

年份：2024

卷号：42

期号：9

起止页码：1393

外文期刊名：CHINESE JOURNAL OF POLYMER SCIENCE

收录：;EI(收录号：20243316877725);WOS:【SCI-EXPANDED(收录号:WOS:001287402600002)】；

基金：This research was funded by the National Key Research and Development Program of China, grant number 2023YFD1700303. We thank the staff at beamline BL19U2 of the National Facility for Protein Science in Shanghai (NFPS) at SSRF for assistance with SAXS during data collection.

语种：英文

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

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.