Preparation and properties of graphite/TinO2n-1 composites

被引：0
|
作者：
Wu E. [1 ,2 ]
Li J. [1 ,2 ]
Hou J. [1 ,2 ]
Huang P. [1 ,2 ]
Xu Z. [1 ,2 ]
Jiang Y. [1 ,2 ]
Luo B. [1 ]
机构：
[1] Panzhihua University, Panzhihua
[2] Sichuan Engineering Laboratory for Solar Energy Utilization Technology Integrated, Panzhihua
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2021年 / 40卷 / 03期
关键词：
Adsorption; Composites; Degradation; Preparation; Reduction; Ti[!sub]n[!/sub]O[!sub]2n-1[!/sub;
D O I：
10.16085/j.issn.1000-6613.2020-0805
中图分类号：
学科分类号：
摘要：
Under atmospheric pressure, the graphite/TinO2n-1 composites were prepared by an carbothermal reduction process of anatase titanium dioxide powders using graphite reductant. The variation of valence state of titanium was investigated by X-ray diffractometer (XRD) in the carbothermal reduction process, and morphology, structure and element composition of the specific reduced sample was analyzed by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The XRD results indicated that the graphite/TinO2n-1 composites with different n value could be obtained with controlling different reduction conditions, and the order of phase transition was TiO2(anatase), TiO2(rutile), Ti9O17, Ti8O15, Ti6O11, Ti5O9 and Ti4O7. The minimum resistivity of the reduced samples was 0.1465Ω•cm, which was prepared at 1250℃ for 20min with the graphite/TiO2 mass ratio of 5: 10. The adsorption capacity of graphite/TinO2n-1 composites in methylene blue (MB) bleaching was enhanced in comparison with graphite powers, and the removal efficiency was 1.40~3.20 times of graphite. Under visible light irradiation, the graphite/TinO2n-1 composites were confirmed to have photocatalytic activity for the degradation of methylene blue (MB) though a little lower than that of anatase TiO2. The maximum apparent rate constant k of the graphite/TinO2n-1 composites was 0.0047min-1. © 2021, Chemical Industry Press Co., Ltd. All right reserved.
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页码：1517 / 1526
页数：9
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