Water treatment efficacy of various metal oxide semiconductors for photocatalytic ozonation under UV and visible light irradiation

Takayuki Mano; Shunsuke Nishimoto; Yoshikazu Kameshima; Michihiro Miyake

doi:10.1016/j.cej.2014.11.088

Water treatment efficacy of various metal oxide semiconductors for photocatalytic ozonation under UV and visible light irradiation

Takayuki Mano, Shunsuke Nishimoto, Yoshikazu Kameshima, Michihiro Miyake

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62 Citations (Scopus)

Abstract

We have investigated a photocatalytic ozonation system of seven metal oxide semiconductors, TiO₂ (P25), Nb₂O₅, SnO₂, WO₃, Fe₂O₃, In₂O₃, and BiVO₄, under visible light both with and without UV irradiation for their efficacy in removing total organic carbon (TOC) from aqueous oxalic acid solution for water treatment. The investigation revealed that all the metal oxide samples functioned as photocatalysts for the photocatalytic ozonation system. TiO₂ exhibited the highest activity under UV irradiation, and also exhibited a little activity under visible light irradiation. WO₃, Fe₂O₃, In₂O₃, and BiVO₄ functioned as visible-light-responsive photocatalysts and Fe₂O₃, In₂O₃, and BiVO₄ were newly identified as active photocatalysts under visible light irradiation for the photocatalytic ozonation system. It is suggested that WO₃ is a promising material for the photocatalytic ozonation system due to its activity in the wavelength range of solar energy.

Original language	English
Pages (from-to)	221-229
Number of pages	9
Journal	Chemical Engineering Journal
Volume	264
DOIs	https://doi.org/10.1016/j.cej.2014.11.088
Publication status	Published - Mar 5 2015

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Keywords

Advanced oxidation processes (AOPs)
Oxalic acid
Photocatalytic ozonation
Visible-light-responsive photocatalyst
Water treatment

ASJC Scopus subject areas

Chemistry(all)
Environmental Chemistry
Chemical Engineering(all)
Industrial and Manufacturing Engineering

Cite this

Mano, T., Nishimoto, S., Kameshima, Y., & Miyake, M. (2015). Water treatment efficacy of various metal oxide semiconductors for photocatalytic ozonation under UV and visible light irradiation. Chemical Engineering Journal, 264, 221-229. https://doi.org/10.1016/j.cej.2014.11.088

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abstract = "We have investigated a photocatalytic ozonation system of seven metal oxide semiconductors, TiO2 (P25), Nb2O5, SnO2, WO3, Fe2O3, In2O3, and BiVO4, under visible light both with and without UV irradiation for their efficacy in removing total organic carbon (TOC) from aqueous oxalic acid solution for water treatment. The investigation revealed that all the metal oxide samples functioned as photocatalysts for the photocatalytic ozonation system. TiO2 exhibited the highest activity under UV irradiation, and also exhibited a little activity under visible light irradiation. WO3, Fe2O3, In2O3, and BiVO4 functioned as visible-light-responsive photocatalysts and Fe2O3, In2O3, and BiVO4 were newly identified as active photocatalysts under visible light irradiation for the photocatalytic ozonation system. It is suggested that WO3 is a promising material for the photocatalytic ozonation system due to its activity in the wavelength range of solar energy.",

keywords = "Advanced oxidation processes (AOPs), Oxalic acid, Photocatalytic ozonation, Visible-light-responsive photocatalyst, Water treatment",

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AB - We have investigated a photocatalytic ozonation system of seven metal oxide semiconductors, TiO2 (P25), Nb2O5, SnO2, WO3, Fe2O3, In2O3, and BiVO4, under visible light both with and without UV irradiation for their efficacy in removing total organic carbon (TOC) from aqueous oxalic acid solution for water treatment. The investigation revealed that all the metal oxide samples functioned as photocatalysts for the photocatalytic ozonation system. TiO2 exhibited the highest activity under UV irradiation, and also exhibited a little activity under visible light irradiation. WO3, Fe2O3, In2O3, and BiVO4 functioned as visible-light-responsive photocatalysts and Fe2O3, In2O3, and BiVO4 were newly identified as active photocatalysts under visible light irradiation for the photocatalytic ozonation system. It is suggested that WO3 is a promising material for the photocatalytic ozonation system due to its activity in the wavelength range of solar energy.

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Access to Document

10.1016/j.cej.2014.11.088