Indirect photocatalytic reduction of arsenate to arsenite in aqueous solution with TiO<sub>2</sub> in the presence of hole scavengers

Abdus Samad; Shamim Ahsan; Ikki Tateishi; Mai Furukawa; Hideyuki Katsumata; Tohru Suzuki; Satoshi Kaneco

doi:10.1016/j.cjche.2017.05.019

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Indirect photocatalytic reduction of arsenate to arsenite in aqueous solution with TiO₂ in the presence of hole scavengers

Catalysis, Kinetics and Reaction Engineering | Updated：2026-01-06

- Indirect photocatalytic reduction of arsenate to arsenite in aqueous solution with TiO₂ in the presence of hole scavengers
- Chinese Journal of Chemical Engineering Vol. 26, Issue 3, Pages: 529-533(2018)
- Affiliations：
  
  1. 2 Department of Earth and Atmospheric Sciences, Metropolitan State University of Denver,CO,USA,80204
  2. 3 Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu,Mie,Japan,514-8507
  3. 4 Mie Global Environment Center for Education & Research, Mie University, Tsu,Mie,Japan,514-8507
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2017.05.019
  CLC：
- Published：2018
- Accepted：
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in the presence of hole scavengers[J]. Chinese Journal of Chemical Engineering, 2018, 26(3): 529-533.
DOI：

in the presence of hole scavengers[J]. Chinese Journal of Chemical Engineering, 2018, 26(3): 529-533. DOI： 10.1016/j.cjche.2017.05.019.

摘要

Abstract

The indirect photocatalytic reduction of arsenate to arsenite in aqueous solution with titanium dioxide (TiO

) was investigated with various hole scavengers such as methanol

ethanol

2-propanol

formaldehyde

acetone

formic acid and acetic acid. Although the direct photocatalytic reduction of arsenate to arsenite with TiO

was impossible

an indirect reduction of As(V) was possible in the presence of sacrificial electron donors to form strongly reductive radicals. The addition of ethanol was very effective for indirect photocatalytic reduction of As(V) in aqueous solution with TiO

photocatalyst. The indirect photocatalytic reduction rate of As(V) may be related with both the reaction rate constants of reaction of hydroxyl radicals with hole scavenger and the reactivities for the radicals M· which are produced by the reaction of ·OH with hole scavenger.

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Indirect photocatalytic reduction of arsenate to arsenite in aqueous solution with TiO2 in the presence of hole scavengers

DOI：10.1016/j.cjche.2017.05.019

摘要

Abstract

关键词

Keywords

references

Indirect photocatalytic reduction of arsenate to arsenite in aqueous solution with TiO₂ in the presence of hole scavengers