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Dendritic BiVO4 decorated with MnOx co-catalyst as an efficient hierarchical catalyst for photocatalytic ozonation.
- Source :
- Frontiers of Chemical Science & Engineering; Mar2019, Vol. 13 Issue 1, p185-191, 7p
- Publication Year :
- 2019
-
Abstract
- An appropriate co-catalyst can significantly promote the photocatalytic efficacy, but this has been seldom studied in the visible-light photocatalysis combined with ozone, namely photocatalytic ozonation. In this work, a dendritic bismuth vanadium tetraoxide (BiVO<subscript>4</subscript>) material composited with highly dispersed MnO<subscript>x</subscript> nanoparticles was synthesized, and its catalytic activity is 86.6% higher than bare BiVO<subscript>4</subscript> in a visible light and ozone combined process. Catalytic ozonation experiments, ultraviolet- visible (UV-Vis) diffuse reflectance spectra and photoluminescence spectra jointly indicate that MnO<subscript>x</subscript> plays a triple role in this process. MnO<subscript>x</subscript> strengthens the light adsorption and promotes the charge separation on the composite material, and it also shows good activity in catalytic ozonation. The key reactive species in this process is $OH, and various pathways for its generation in this process is proposed. This work provides a new direction of catalyst preparation and pushes forward the application of photocatalytic ozonation in water treatment. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20950179
- Volume :
- 13
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Frontiers of Chemical Science & Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 134969571
- Full Text :
- https://doi.org/10.1007/s11705-018-1713-z