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Reductive Transformation of Aqueous Pollutants Using Heterogeneous Photocatalysis: A Review
https://orcid.org/http://orcid.org/0000-0002-5342-9690
Photocatalytic oxidation (PCO) and photocatalytic reduction (PCR) are two different pathways employed for degradation of aqueous pollutants. While abundant published material is available on PCO, PCR appears to be less explored. PCR can be a promising technique especially for removal of heavy metals, recovery of noble metals, and dehalogenation of halogenated pollutants. Besides the photocatalyst, hole-scavengers (HS) plays very important role in PCR. The basic mechanism involved in PCR of pollutants and importance of proper selection of HS has been delineated. An effort has also been made to summarize the influence of various operational parameters like type and concentration of photocatalyst, type and concentration of HS, and initial pH on the efficiency of photocatalytic reduction of the pollutants. Possibility of using sequential photocatalytic reduction–oxidation for complete mineralization of toxic pollutants is also discussed. The development of various heterojunction structures for efficient separation of charge carriers is also critically reviewed.
Reductive Transformation of Aqueous Pollutants Using Heterogeneous Photocatalysis: A Review
https://orcid.org/http://orcid.org/0000-0002-5342-9690
Photocatalytic oxidation (PCO) and photocatalytic reduction (PCR) are two different pathways employed for degradation of aqueous pollutants. While abundant published material is available on PCO, PCR appears to be less explored. PCR can be a promising technique especially for removal of heavy metals, recovery of noble metals, and dehalogenation of halogenated pollutants. Besides the photocatalyst, hole-scavengers (HS) plays very important role in PCR. The basic mechanism involved in PCR of pollutants and importance of proper selection of HS has been delineated. An effort has also been made to summarize the influence of various operational parameters like type and concentration of photocatalyst, type and concentration of HS, and initial pH on the efficiency of photocatalytic reduction of the pollutants. Possibility of using sequential photocatalytic reduction–oxidation for complete mineralization of toxic pollutants is also discussed. The development of various heterojunction structures for efficient separation of charge carriers is also critically reviewed.
Reductive Transformation of Aqueous Pollutants Using Heterogeneous Photocatalysis: A Review
https://orcid.org/http://orcid.org/0000-0002-5342-9690
Photocatalytic oxidation (PCO) and photocatalytic reduction (PCR) are two different pathways employed for degradation of aqueous pollutants. While abundant published material is available on PCO, PCR appears to be less explored. PCR can be a promising technique especially for removal of heavy metals, recovery of noble metals, and dehalogenation of halogenated pollutants. Besides the photocatalyst, hole-scavengers (HS) plays very important role in PCR. The basic mechanism involved in PCR of pollutants and importance of proper selection of HS has been delineated. An effort has also been made to summarize the influence of various operational parameters like type and concentration of photocatalyst, type and concentration of HS, and initial pH on the efficiency of photocatalytic reduction of the pollutants. Possibility of using sequential photocatalytic reduction–oxidation for complete mineralization of toxic pollutants is also discussed. The development of various heterojunction structures for efficient separation of charge carriers is also critically reviewed.
Reductive Transformation of Aqueous Pollutants Using Heterogeneous Photocatalysis: A Review
J. Inst. Eng. India Ser. A
Shah, Bhaumik R. (Autor:in) / Patel, Upendra D. (Autor:in)
Journal of The Institution of Engineers (India): Series A ; 103 ; 305-318
01.03.2022
14 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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