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.
引用
收藏
页码：1517 / 1526
页数：9
相关论文
共 32 条
  • [21] LIU Kejia, WANG Yaowu, DI Yuezhong, Et al., Preparation of porous Ti<sub>2</sub>O<sub>3</sub> via a carbothermal reduction of titanium dioxide, Ceramics International, 44, 1, pp. 1007-1012, (2018)
  • [22] CHEN Xilai, LI Yuanbing, TAN Junfeng, Et al., Thermodynamic analysis for reduction of TiO<sub>2</sub> by carbon, aluminum and silicon in the presence of N<sub>2</sub> and CO, Bulletin of the Chinese Ceramic Society, 26, 1, pp. 162-167, (2007)
  • [23] MAO Xian, YUAN Fanglu, ZHOU Anqi, Et al., Magnéli phases Ti<sub>n</sub>O<sub>2n-1</sub> as novel ozonation catalysts for effective mineralization of phenol, Chinese Journal of Chemical Engineering, 26, 9, pp. 1978-1984, (2018)
  • [24] LI Lu, CHEN Yan, JIAO Shihui, Et al., Synthesis, microstructure, and properties of black anatase and B phase TiO<sub>2</sub> nanoparticles, Materials & Design, 100, pp. 235-240, (2016)
  • [25] WALSH F C, WILLS R G A., The continuing development of Magnéli phase titanium sub-oxides and Ebonex<sup>®</sup> electrodes, Electrochimica Acta, 55, 22, pp. 6342-6351, (2010)
  • [26] NOORJAHAN M, REDDY M P, KUMARI V D, Et al., Photocatalytic degradation of H-acid over a novel TiO<sub>2</sub> thin film fixed bed reactor and in aqueous suspensions, Journal of Photochemistry and Photobiology A: Chemistry, 156, pp. 179-187, (2003)
  • [27] ZHANG Jiawei, WANG Sheng, LIU Fusheng, Et al., Preparation of defective TiO<sub>2-x</sub> hollow microspheres for photocatalytic degradation of methylene blue, Acta Physico-Chimica Sinica, 35, 8, pp. 885-895, (2019)
  • [28] HUANG Haifeng, JIA Jianming, LU Hanfeng, Et al., Effect of designed Zr/Ti molar ratio on the photocatalytic activity of Sr-Zr-Ti mixed oxide catalysts under visible light, Acta Physico-Chimica Sinica, 29, 6, pp. 1319-1326, (2013)
  • [29] ZHAO Xin, ZHANG Xiaojing, ZHAO Bolin, Et al., A direct oxygen vacancy essential Z-scheme C@Ti<sub>4</sub>O<sub>7</sub>/g-C<sub>3</sub>N<sub>4</sub> heterojunctions for visible-light degradation towards environmental dye pollutants, Applied Surface Science, 525, (2020)
  • [30] MARAGATHA J, JOTHIVENKATACHALAM K, KARUPPUCHAMY S., Synthesis and characterization of visible light-responsive carbon doped Ti<sub>4</sub>O<sub>7</sub> photocatalyst, Journal of Materials Science: Materials in Electronics, 27, pp. 9233-9239, (2016)
1234