Recent developments of metal oxide semiconductors as photocatalysts in advanced oxidation processes (AOPs) for treatment of dye waste-water

The textile industry presents a global pollution problem owing to the dumping or accidental discharge of dye waste‐water into waterways, which is having a major impact on the quality and aesthetics of water resources. The World Bank estimates that 17 to 20% of industrial water pollution comes from t...

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Bibliographic Details
Published in:Journal of chemical technology and biotechnology (1986) 2011-09, Vol.86 (9), p.1130-1158
Main Authors: Chan, Samuel Hong Shen, Yeong Wu, Ta, Juan, Joon Ching, Teh, Chee Yang
Format: Article
Language:English
Subjects:
advanced oxidation process (AOP)
Applied sciences
Biological and physicochemical phenomena
Catalysis
Catalytic reactions
Categories
Chemical engineering
Chemistry
decolorization
dye waste-water treatment
Dyes
Exact sciences and technology
General and physical chemistry
General purification processes
metal oxide semiconductor
Metal oxide semiconductors
Natural water pollution
Oxidation
photocatalysis
Pollution
Reactors
Semiconductors
Textiles
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Waste water
Wastewaters
Water pollution
Water treatment and pollution
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Summary:The textile industry presents a global pollution problem owing to the dumping or accidental discharge of dye waste‐water into waterways, which is having a major impact on the quality and aesthetics of water resources. The World Bank estimates that 17 to 20% of industrial water pollution comes from textile dyeing and treatment. This percentage represents an appalling environmental challenge for clothing designers and other textile manufacturers. Recently, the application of metal oxide semiconductors in the advanced oxidation process (AOP) has gained wide interest for the treatment of dye waste‐water owing to its good degradation efficiency, low toxicity and physical and chemical properties. AOP refers to a set of chemical treatment procedures designed to remove organic and inorganic materials from waste‐water by oxidation. In this paper, recently developed metal oxide semiconductors are discussed, in which the semiconductors are generally divided into three categories: (i) titanium dioxide; (ii) zinc oxide; and (iii) other metal oxides (such as vanadium oxide, tungsten oxide, molybdenum oxide, indium oxide and cerium oxide). The syntheses and modification methods as well as the efficiency of each category are discussed and analyzed. Copyright © 2011 Society of Chemical Industry
ISSN:0268-2575
1097-4660
1097-4660
DOI:10.1002/jctb.2636