Chemical Journal of Chinese Universities

• Article •    

Carbon-doped Oxygen-deficient TiO2 Fibers Synthesized without Adding External Carbon Sources and Their Photocatalytic Activity

ZHOU Shuai, WANG Juan()   

  1. College of Environmental and Resource Sciences,Zhejiang University,Hangzhou 310058,China
  • Received:2020-08-31 Online:2020-12-14 Published:2020-12-14
  • Contact: WANG Juan E-mail:wjuan@zju.edu.cn
  • Supported by:
    ? Supported by the National Natural Science Foundation of China(41703083);the Outstanding Youth Project of Zhejiang Natural Science Foundation, China(LR21B070002)

Abstract:

The carbon-doped oxygen-deficient TiO2(C-TiO2-n) fiber photocatalysts were prepared by sol-gel method combined with centrifugal spinning technology and heat treatment under steam. The structure, component and properties of the C-TiO2-n fibers as well as the effect of carbon doping on the photocatalytic activity of C-TiO2-n fibers were investigated. The results confirm that the introduction of carbon into TiO2 can be realized using the organic components in the fiber precursor as carbon sources without the introduction of external carbon sources. The introduction of carbon components effectively improved the light harvesting ability of photocatalysts and inhibited the recombination of photoinduced carriers. In the photocatalytic degradation experiment with azo dye reactive brilliant red(X-3B) as the target pollutant, C-TiO2-n fibers showed excellent photocatalytic activity and cycling stability. After visible light irradiation of 60 min, the degradation rate of X-3B over C-TiO2-n fibers reached 96.99%, and the kinetic constant was 0.0556 min-1, 19.86 times higher than that of TiO2-n fibers.

Key words: Oxygen-deficient TiO2, Carbon dopant, Fiber, Photocatalysis

CLC Number: