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A Photocatalytic Rotating Disc Reactor with TiO(2) Nanowire Arrays Deposited for Industrial Wastewater Treatment

A photocatalytic rotating disc reactor (PRD-reactor) with TiO(2) nanowire arrays deposited on a thin Ti plate is fabricated and tested for industrial wastewater treatment. Results indicate that the PRD-reactor shows excellent decolorization capability when tested with methyl orange (>97.5%). Adva...

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Autores principales: Li, Fang, Szeto, Wai, Huang, Haibao, Li, Jiantao, Leung, Dennis Y. C.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6155860/
https://www.ncbi.nlm.nih.gov/pubmed/28241440
http://dx.doi.org/10.3390/molecules22020337
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author Li, Fang
Szeto, Wai
Huang, Haibao
Li, Jiantao
Leung, Dennis Y. C.
author_facet Li, Fang
Szeto, Wai
Huang, Haibao
Li, Jiantao
Leung, Dennis Y. C.
author_sort Li, Fang
collection PubMed
description A photocatalytic rotating disc reactor (PRD-reactor) with TiO(2) nanowire arrays deposited on a thin Ti plate is fabricated and tested for industrial wastewater treatment. Results indicate that the PRD-reactor shows excellent decolorization capability when tested with methyl orange (>97.5%). Advanced oxidation processes (AOP), including photocatalytic oxidation and photolytic reaction, occurred during the processing. Efficiency of the AOP increases with reduction in light absorption pathlength, which enhanced the photocatalytic reaction, as well as by increasing oxygen exposure of the wastewater thin film due to the rotating disc design. It is found that, with a small dosage of hydrogen peroxide, the mineralization efficiency of industrial biodegraded wastewater can be enhanced, with a superior mineralization of >75% total organic carbon (TOC) removal. This is due to the fact that the TiO(2) photocatalysis and hydrogen peroxide processes generate powerful oxidants (hydroxyl radicals) that can strongly improve photocatalytic oxidation efficiency. Application of this industrial wastewater treatment system is benefited from the TiO(2) nanowire arrays, which can be fabricated by a mild solvothermal method at 80 °C and under atmospheric pressure. Similar morphologies and microstructures are found for the TiO(2) nanowire arrays deposited on a large metal Ti disc, which makes the wastewater treatment process more practical and economical.
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spelling pubmed-61558602018-11-13 A Photocatalytic Rotating Disc Reactor with TiO(2) Nanowire Arrays Deposited for Industrial Wastewater Treatment Li, Fang Szeto, Wai Huang, Haibao Li, Jiantao Leung, Dennis Y. C. Molecules Article A photocatalytic rotating disc reactor (PRD-reactor) with TiO(2) nanowire arrays deposited on a thin Ti plate is fabricated and tested for industrial wastewater treatment. Results indicate that the PRD-reactor shows excellent decolorization capability when tested with methyl orange (>97.5%). Advanced oxidation processes (AOP), including photocatalytic oxidation and photolytic reaction, occurred during the processing. Efficiency of the AOP increases with reduction in light absorption pathlength, which enhanced the photocatalytic reaction, as well as by increasing oxygen exposure of the wastewater thin film due to the rotating disc design. It is found that, with a small dosage of hydrogen peroxide, the mineralization efficiency of industrial biodegraded wastewater can be enhanced, with a superior mineralization of >75% total organic carbon (TOC) removal. This is due to the fact that the TiO(2) photocatalysis and hydrogen peroxide processes generate powerful oxidants (hydroxyl radicals) that can strongly improve photocatalytic oxidation efficiency. Application of this industrial wastewater treatment system is benefited from the TiO(2) nanowire arrays, which can be fabricated by a mild solvothermal method at 80 °C and under atmospheric pressure. Similar morphologies and microstructures are found for the TiO(2) nanowire arrays deposited on a large metal Ti disc, which makes the wastewater treatment process more practical and economical. MDPI 2017-02-22 /pmc/articles/PMC6155860/ /pubmed/28241440 http://dx.doi.org/10.3390/molecules22020337 Text en © 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Li, Fang
Szeto, Wai
Huang, Haibao
Li, Jiantao
Leung, Dennis Y. C.
A Photocatalytic Rotating Disc Reactor with TiO(2) Nanowire Arrays Deposited for Industrial Wastewater Treatment
title A Photocatalytic Rotating Disc Reactor with TiO(2) Nanowire Arrays Deposited for Industrial Wastewater Treatment
title_full A Photocatalytic Rotating Disc Reactor with TiO(2) Nanowire Arrays Deposited for Industrial Wastewater Treatment
title_fullStr A Photocatalytic Rotating Disc Reactor with TiO(2) Nanowire Arrays Deposited for Industrial Wastewater Treatment
title_full_unstemmed A Photocatalytic Rotating Disc Reactor with TiO(2) Nanowire Arrays Deposited for Industrial Wastewater Treatment
title_short A Photocatalytic Rotating Disc Reactor with TiO(2) Nanowire Arrays Deposited for Industrial Wastewater Treatment
title_sort photocatalytic rotating disc reactor with tio(2) nanowire arrays deposited for industrial wastewater treatment
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6155860/
https://www.ncbi.nlm.nih.gov/pubmed/28241440
http://dx.doi.org/10.3390/molecules22020337
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