Photocatalytic Activity of TiO<inf>2</inf>/g-C<inf>3</inf>N<inf>4</inf> Nanocomposites for Removal of Monochlorophenols from Water

This research employed g-C3N4 nanosheets in the hydrothermal synthesis of TiO2/g-C3N4 hybrid photocatalysts. The TiO2/g-C3N4 heterojunctions, well-dispersed TiO2 nanoparticles on the g-C3N4 nanosheets, are effective photocatalysts for the degradation of monochlorophenols (MCPs: 2-CP, 3-CP, and 4-CP)...

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Main Author: Kobkeatthawin T.
Other Authors: Mahidol University
Format: Article
Published: 2023
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Online Access:https://repository.li.mahidol.ac.th/handle/123456789/87127
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spelling th-mahidol.871272023-06-20T11:45:19Z Photocatalytic Activity of TiO<inf>2</inf>/g-C<inf>3</inf>N<inf>4</inf> Nanocomposites for Removal of Monochlorophenols from Water Kobkeatthawin T. Mahidol University Chemical Engineering This research employed g-C3N4 nanosheets in the hydrothermal synthesis of TiO2/g-C3N4 hybrid photocatalysts. The TiO2/g-C3N4 heterojunctions, well-dispersed TiO2 nanoparticles on the g-C3N4 nanosheets, are effective photocatalysts for the degradation of monochlorophenols (MCPs: 2-CP, 3-CP, and 4-CP) which are prominent water contaminants. The removal efficiency of 2-CP and 4-CP reached 87% and 64%, respectively, after treatment of 25 ppm CP solutions with the photocatalyst (40TiO2/g-C3N4, 1 g/L) and irradiation with UV–Vis light. Treatment of CP solutions with g-C3N4 nanosheets or TiO2 alone in conjunction with irradiation gave removal efficiencies lower than 50%, which suggests the two act synergically to enhance the photocatalytic activity of the 40TiO2/g-C3N4 nanocomposite. Superoxide and hydroxyl radicals are key active species produced during CP photodegradation. In addition, the observed nitrogen and Ti3+ defects and oxygen vacancies in the TiO2/g-C3N4 nanocomposites may improve the light-harvesting ability of the composite and assist preventing rapid electron-hole recombination on the surface, enhancing the photocatalytic performance. In addition, interfacial interactions between the MCPs (low polarity) and thermally exfoliated carbon nitride in the TiO2/g-C3N4 nanocomposites may also enhance MCP degradation. 2023-06-20T04:45:19Z 2023-06-20T04:45:19Z 2022-08-01 Article Nanomaterials Vol.12 No.16 (2022) 10.3390/nano12162852 20794991 2-s2.0-85137385197 https://repository.li.mahidol.ac.th/handle/123456789/87127 SCOPUS
institution Mahidol University
building Mahidol University Library
continent Asia
country Thailand
Thailand
content_provider Mahidol University Library
collection Mahidol University Institutional Repository
topic Chemical Engineering
spellingShingle Chemical Engineering
Kobkeatthawin T.
Photocatalytic Activity of TiO<inf>2</inf>/g-C<inf>3</inf>N<inf>4</inf> Nanocomposites for Removal of Monochlorophenols from Water
description This research employed g-C3N4 nanosheets in the hydrothermal synthesis of TiO2/g-C3N4 hybrid photocatalysts. The TiO2/g-C3N4 heterojunctions, well-dispersed TiO2 nanoparticles on the g-C3N4 nanosheets, are effective photocatalysts for the degradation of monochlorophenols (MCPs: 2-CP, 3-CP, and 4-CP) which are prominent water contaminants. The removal efficiency of 2-CP and 4-CP reached 87% and 64%, respectively, after treatment of 25 ppm CP solutions with the photocatalyst (40TiO2/g-C3N4, 1 g/L) and irradiation with UV–Vis light. Treatment of CP solutions with g-C3N4 nanosheets or TiO2 alone in conjunction with irradiation gave removal efficiencies lower than 50%, which suggests the two act synergically to enhance the photocatalytic activity of the 40TiO2/g-C3N4 nanocomposite. Superoxide and hydroxyl radicals are key active species produced during CP photodegradation. In addition, the observed nitrogen and Ti3+ defects and oxygen vacancies in the TiO2/g-C3N4 nanocomposites may improve the light-harvesting ability of the composite and assist preventing rapid electron-hole recombination on the surface, enhancing the photocatalytic performance. In addition, interfacial interactions between the MCPs (low polarity) and thermally exfoliated carbon nitride in the TiO2/g-C3N4 nanocomposites may also enhance MCP degradation.
author2 Mahidol University
author_facet Mahidol University
Kobkeatthawin T.
format Article
author Kobkeatthawin T.
author_sort Kobkeatthawin T.
title Photocatalytic Activity of TiO<inf>2</inf>/g-C<inf>3</inf>N<inf>4</inf> Nanocomposites for Removal of Monochlorophenols from Water
title_short Photocatalytic Activity of TiO<inf>2</inf>/g-C<inf>3</inf>N<inf>4</inf> Nanocomposites for Removal of Monochlorophenols from Water
title_full Photocatalytic Activity of TiO<inf>2</inf>/g-C<inf>3</inf>N<inf>4</inf> Nanocomposites for Removal of Monochlorophenols from Water
title_fullStr Photocatalytic Activity of TiO<inf>2</inf>/g-C<inf>3</inf>N<inf>4</inf> Nanocomposites for Removal of Monochlorophenols from Water
title_full_unstemmed Photocatalytic Activity of TiO<inf>2</inf>/g-C<inf>3</inf>N<inf>4</inf> Nanocomposites for Removal of Monochlorophenols from Water
title_sort photocatalytic activity of tio<inf>2</inf>/g-c<inf>3</inf>n<inf>4</inf> nanocomposites for removal of monochlorophenols from water
publishDate 2023
url https://repository.li.mahidol.ac.th/handle/123456789/87127
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