Methyl orange removal by combined visible-light photocatalysis and membrane distillation

Author:

Huo, Yuning; Xie, Zongli ; Wang, Xingdong; Li, Hexing; Hoang, Manh; Caruso, Rachel

Date of Publication:

2013-07

Publication Type:

Journal Article

Journal Title:

Dyes and Pigments

Volume:

98

Issue:

1

Pages:

106-112

Abstract:

A photocatalytic membrane reactor combining a visible-light BiOBr photocatalyst and direct contact membrane distillation was studied for the removal of methyl orange from an aqueous solution. The hierarchical flower-like BiOBr microspheres, assemblies of BiOBr nanosheets, exhibited high efficiency for methyl orange photo-degradation under visible-light irradiation and due to their large specific surface area, their visible-light absorbance and the lower recombination of photo-generated electrons and holes. The main active species during the photo-degradation process was determined to be *O2- radicals. The organic pollutant and catalyst were retained on the feed side, as the membrane distillation only allowed water vapor to permeate through the hydrophobic membrane, leading to a high quality water stream on the permeate side. The micrometer size of the BiOBr photocatalyst may prevent fouling of the polytetrafluoroethylene membrane, making the photocatalytic membrane reactor applicable for industrial wastewater treatment.

Publisher:

Elsevier

Field Of Research:

Environmental Sciences not elsewhere classified

DOI:

https://doi.org/10.1016/j.dyepig.2013.02.009

URL:

Link to Publisher's Version

Rights Notice:

© 2013 Elsevier

Identifier:

EP133287

Publication Sub Type:

Journal article - Refereed

Language:

English

Attribution Statement:

Huo, Yuning; Xie, Zongli; Wang, Xingdong; Li, Hexing; Hoang, Manh; Caruso, Rachel. Methyl orange removal by combined visible-light photocatalysis and membrane distillation. Dyes and Pigments. 2013; 98(1):106-112. https://doi.org/10.1016/j.dyepig.2013.02.009