Coupled Microwave/Photoassisted Methods for Environmental Remediation

The microwave-induced acceleration of photocatalytic reactions was discovered serendipitously in the late 1990s. The activity of photocatalysts is enhanced significantly by both microwave radiation and UV light. Particularly relevant, other than as a heat source, was the enigmatic phenomenon of the...

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Main Authors: Satoshi Horikoshi, Nick Serpone
Format: Article
Language:English
Published: MDPI AG 2014-11-01
Series:Molecules
Subjects:
Online Access:http://www.mdpi.com/1420-3049/19/11/18102
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spelling doaj-9c3aba516076418a95f1f38f9e56fe232020-11-24T23:04:32ZengMDPI AGMolecules1420-30492014-11-011911181021812810.3390/molecules191118102molecules191118102Coupled Microwave/Photoassisted Methods for Environmental RemediationSatoshi Horikoshi0Nick Serpone1Department of Materials and Life Sciences, Faculty of Science and Technology, Sophia University, 7-1 Kioicho, Chiyodaku, Tokyo 102-8554, JapanPhotoGreen Laboratory, Dipartimento di Chimica, Università di Pavia, via Taramelli 12, Pavia 27100, ItalyThe microwave-induced acceleration of photocatalytic reactions was discovered serendipitously in the late 1990s. The activity of photocatalysts is enhanced significantly by both microwave radiation and UV light. Particularly relevant, other than as a heat source, was the enigmatic phenomenon of the non-thermal effect(s) of the microwave radiation that facilitated photocatalyzed reactions, as evidenced when examining various model contaminants in aqueous media. Results led to an examination of the possible mechanism(s) of the microwave effect(s). In the present article we contend that the microwaves’ non-thermal effect(s) is an important factor in the enhancement of TiO2-photoassisted reactions involving the decomposition of organic pollutants in model wastewaters by an integrated (coupled) microwave-/UV-illumination method (UV/MW). Moreover, such coupling of no less than two irradiation methods led to the fabrication and ultimate investigation of microwave discharged electrodeless lamps (MDELs) as optimal light sources; their use is also described. The review focuses on the enhanced activity of photocatalytic reactions when subjected to microwave radiation and concentrates on the authors’ research of the past few years.http://www.mdpi.com/1420-3049/19/11/18102photocatalystTiO2microwavenon-thermal effectwastewater treatmentmicrowave discharge electrodeless lamp
collection DOAJ
language English
format Article
sources DOAJ
author Satoshi Horikoshi
Nick Serpone
spellingShingle Satoshi Horikoshi
Nick Serpone
Coupled Microwave/Photoassisted Methods for Environmental Remediation
Molecules
photocatalyst
TiO2
microwave
non-thermal effect
wastewater treatment
microwave discharge electrodeless lamp
author_facet Satoshi Horikoshi
Nick Serpone
author_sort Satoshi Horikoshi
title Coupled Microwave/Photoassisted Methods for Environmental Remediation
title_short Coupled Microwave/Photoassisted Methods for Environmental Remediation
title_full Coupled Microwave/Photoassisted Methods for Environmental Remediation
title_fullStr Coupled Microwave/Photoassisted Methods for Environmental Remediation
title_full_unstemmed Coupled Microwave/Photoassisted Methods for Environmental Remediation
title_sort coupled microwave/photoassisted methods for environmental remediation
publisher MDPI AG
series Molecules
issn 1420-3049
publishDate 2014-11-01
description The microwave-induced acceleration of photocatalytic reactions was discovered serendipitously in the late 1990s. The activity of photocatalysts is enhanced significantly by both microwave radiation and UV light. Particularly relevant, other than as a heat source, was the enigmatic phenomenon of the non-thermal effect(s) of the microwave radiation that facilitated photocatalyzed reactions, as evidenced when examining various model contaminants in aqueous media. Results led to an examination of the possible mechanism(s) of the microwave effect(s). In the present article we contend that the microwaves’ non-thermal effect(s) is an important factor in the enhancement of TiO2-photoassisted reactions involving the decomposition of organic pollutants in model wastewaters by an integrated (coupled) microwave-/UV-illumination method (UV/MW). Moreover, such coupling of no less than two irradiation methods led to the fabrication and ultimate investigation of microwave discharged electrodeless lamps (MDELs) as optimal light sources; their use is also described. The review focuses on the enhanced activity of photocatalytic reactions when subjected to microwave radiation and concentrates on the authors’ research of the past few years.
topic photocatalyst
TiO2
microwave
non-thermal effect
wastewater treatment
microwave discharge electrodeless lamp
url http://www.mdpi.com/1420-3049/19/11/18102
work_keys_str_mv AT satoshihorikoshi coupledmicrowavephotoassistedmethodsforenvironmentalremediation
AT nickserpone coupledmicrowavephotoassistedmethodsforenvironmentalremediation
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