Study on degradation of diesel pollutants in seawater by composite photocatalyst MnO 2 /ZrO 2

In this paper, the effectiveness of the composite photocatalyst was studied by using manganese dioxide (MnO )/zirconium dioxide (ZrO ) to degrade diesel pollutants in seawater under visible light.The MnO /ZrO photocatalyst was prepared by co-precipitation and characterized by scanning electron micro...

Full description

Saved in:
Bibliographic Details
Published in:Water science and technology 2020-06, Vol.81 (12), p.2599
Main Authors: Tian, Siyao, Yu, Xiaocai, Yin, Danni, Wang, Liping, Liao, Jiaqi, Zhu, Wanting
Format: Article
Language:English
Subjects:
Catalysis
Environmental Pollutants
Hydrogen Peroxide
Manganese Compounds
Oxides
Seawater
Titanium
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this paper, the effectiveness of the composite photocatalyst was studied by using manganese dioxide (MnO )/zirconium dioxide (ZrO ) to degrade diesel pollutants in seawater under visible light.The MnO /ZrO photocatalyst was prepared by co-precipitation and characterized by scanning electron microscopy, X-ray powder diffraction, energy-dispersive spectroscopy and UV-Vis diffuse reflectance spectroscopy analysis. This is the first report on a comprehensive analytical study on the effect of various physio-chemical parameters on diesel degradation using the synthesized MnO /ZrO photocatalysts. The effects of doping ratio of MnO /ZrO , dosage, initial diesel concentration, calcination temperature, concentration of H O solutions and illumination time on the diesel degradation were investigated. The degradation of diesel pollution in seawater was optimized by orthogonal experiment. According to the results, the prepared samples were monoclinic form and the MnO was successfully doped into the bulk ZrO . The absorption edge of the MnO /ZrO photocatalysts exhibited red shift, and this red shifts imply enhanced photon absorption under visible light compared with the pure ZrO . The results showed that under optimum reaction conditions, the degradation rate can reach 92.92%. The result of this study will enable ZrO to make more effective use of sunlight and improve the actual value of photocatalytic technology in the field of contaminant treatment.
ISSN:0273-1223