Preparation and photocatalytic properties of nano TiO2/carbonized plant fiber composites

被引：0
|
作者：
Ren B. [1 ]
Wang R. [2 ]
Ren J. [1 ]
Li J. [1 ]
Chen Q. [1 ]
机构：
[1] School of Materials Science and Engineering, Ji'nan University, Ji'nan
[2] School of Materials Science and Engineering, Jiangsu University, Zhenjiang
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2020年 / 37卷 / 05期
关键词：
Carbonized plant fiber; Composite photocatalyst; Impregnation-calcination synthesis; Nano TiO[!sub]2[!/sub; Solvothermal synthesis;
D O I：
10.13801/j.cnki.fhclxb.20190924.003
中图分类号：
学科分类号：
摘要：
The nano TiO2/carbonized plant fiber (CPF) composite photocatalysts were synthesized by impregnation-calcination and solvothermal methods, anchored with the nano TiO2 photocatalyst on the surface of carbon fiber, and the photocatalytic properties of the nano TiO2/CPF composite photocatalysts were studied by photocatalytic degradation of methylene blue. The microstructure and chemical compositions of the nano TiO2/CPF composite photocatalysts were characterized by SEM, HRTEM, XRD and EDS, and the effects of fiber and loading of TiO2 on the photocatalytic activity were studied via degradation of methylene blue. The results show that photocatalytic performance of nano TiO2/CPF composite photocatalysts enhances first and then decreases with the increase of the loading of TiO2 in a certain range. The improved photocatalytic activity of nano TiO2/CPF composite photocatalysts can be attributed to the synergistic effect of CPF and TiO2, and the excellent separation efficiency of charged carriers at the interface of TiO2 and CPF. The key active species in the reaction are superoxide anions and hydroxyl radical, and the latter is the main species. TiO2 formed by the impregnation-calcination and the solvothermal exhibits different forms on the surface of the fiber, corresponding to film enclosed the fiber, and crystalline nanoparticles attached on the surface of the fiber, respectively. © 2020, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.
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页码：1138 / 1147
页数：9
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