Investigation of the effect of magnesium and activated carbon on the photocatalytic degradation reaction of ZnO photocatalyst


Cevik M. S. , Sahin Ö. , Baytar O., Horoz S., Ekinci A.

DESALINATION AND WATER TREATMENT, vol.209, pp.212-218, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 209
  • Publication Date: 2021
  • Doi Number: 10.5004/dwt.2021.26468
  • Title of Journal : DESALINATION AND WATER TREATMENT
  • Page Numbers: pp.212-218
  • Keywords: Activated carbon, Characterization, Doping, Photocatalytic, Synthesis, METHYLENE-BLUE, REMOVAL, NANOPARTICLES, GENERATION, MECHANISMS, SURFACE

Abstract

To improve the photodegradation of methyl blue (MB) by ZnO under visible light irradiation, the sol-gel method was used to synthesize ZnO photocatalysts co-doped with Mg and supported on activated carbon (AC) with various properties. The photocatalysts synthesized were characterized in terms of their structure and optical properties. X-ray diffraction and UV-vis absorption spectra measurements were carried out to examine the structural and optical properties of photocatalysts. Such photocatalytic behaviors of photocatalysts preceded the order: Mg:ZnO/AC > ZnO/AC > ZnO. This consequence was ascribed to the small crystallite size, large surface area, the narrow bandgap of Mg:ZnO/AC photocatalyst. Besides, first-order kinetics accompanied the degradation of MB on photocatalysis. The active species (OH)-O-center dot and O-center dot(2)- performed more key roles in composite photocatalytic degradation of MB.