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Polymer Nanocomposites for Photocatalytic Degradation and Photoinduced Utilizations of Azo-Dyes
Specially designed polymer nanocomposites can photo-catalytically degrade azo dyes in wastewater and textile effluents, among which TiO(2)-based nanocomposites are outstanding and extensively explored. Other nanocomposites based on natural polymers (i.e., chitosan and kaolin) and the oxides of Al, A...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8069933/ https://www.ncbi.nlm.nih.gov/pubmed/33918713 http://dx.doi.org/10.3390/polym13081215 |
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author | Wang, Emily Z. Wang, Yigui Xiao, Dequan |
author_facet | Wang, Emily Z. Wang, Yigui Xiao, Dequan |
author_sort | Wang, Emily Z. |
collection | PubMed |
description | Specially designed polymer nanocomposites can photo-catalytically degrade azo dyes in wastewater and textile effluents, among which TiO(2)-based nanocomposites are outstanding and extensively explored. Other nanocomposites based on natural polymers (i.e., chitosan and kaolin) and the oxides of Al, Au, B, Bi, Fe, Li, and Zr are commonly used. These nanocomposites have better photocatalytic efficiency than pure TiO(2) through two considerations: (i) reducing the hole/electron recombination rate by stabilizing the excited electron in the conducting band, which can be achieved in TiO(2)-nanocomposites with graphene, graphene oxide, hexagonal boron nitride (h-BN), metal nanoparticles, or doping; (ii) decreasing the band energy of semiconductors by forming nanocomposites between TiO(2) and other oxides or conducting polymers. Increasing the absorbance efficiency by forming special nanocomposites also increases photocatalytic performance. The photo-induced isomerization is exploited in biological systems, such as artificial muscles, and in technical fields such as memory storage and liquid crystal display. Heteroaryl azo dyes show remarkable shifts in photo-induced isomerization, which can be applied in biological and technical fields in place of azo dyes. The self-assembly methods can be employed to synthesize azo-dye polymer nanocomposites via three types of interactions: electrostatic interactions, London forces or dipole/dipole interactions between azo dyes, and photo alignments. |
format | Online Article Text |
id | pubmed-8069933 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-80699332021-04-26 Polymer Nanocomposites for Photocatalytic Degradation and Photoinduced Utilizations of Azo-Dyes Wang, Emily Z. Wang, Yigui Xiao, Dequan Polymers (Basel) Review Specially designed polymer nanocomposites can photo-catalytically degrade azo dyes in wastewater and textile effluents, among which TiO(2)-based nanocomposites are outstanding and extensively explored. Other nanocomposites based on natural polymers (i.e., chitosan and kaolin) and the oxides of Al, Au, B, Bi, Fe, Li, and Zr are commonly used. These nanocomposites have better photocatalytic efficiency than pure TiO(2) through two considerations: (i) reducing the hole/electron recombination rate by stabilizing the excited electron in the conducting band, which can be achieved in TiO(2)-nanocomposites with graphene, graphene oxide, hexagonal boron nitride (h-BN), metal nanoparticles, or doping; (ii) decreasing the band energy of semiconductors by forming nanocomposites between TiO(2) and other oxides or conducting polymers. Increasing the absorbance efficiency by forming special nanocomposites also increases photocatalytic performance. The photo-induced isomerization is exploited in biological systems, such as artificial muscles, and in technical fields such as memory storage and liquid crystal display. Heteroaryl azo dyes show remarkable shifts in photo-induced isomerization, which can be applied in biological and technical fields in place of azo dyes. The self-assembly methods can be employed to synthesize azo-dye polymer nanocomposites via three types of interactions: electrostatic interactions, London forces or dipole/dipole interactions between azo dyes, and photo alignments. MDPI 2021-04-09 /pmc/articles/PMC8069933/ /pubmed/33918713 http://dx.doi.org/10.3390/polym13081215 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Review Wang, Emily Z. Wang, Yigui Xiao, Dequan Polymer Nanocomposites for Photocatalytic Degradation and Photoinduced Utilizations of Azo-Dyes |
title | Polymer Nanocomposites for Photocatalytic Degradation and Photoinduced Utilizations of Azo-Dyes |
title_full | Polymer Nanocomposites for Photocatalytic Degradation and Photoinduced Utilizations of Azo-Dyes |
title_fullStr | Polymer Nanocomposites for Photocatalytic Degradation and Photoinduced Utilizations of Azo-Dyes |
title_full_unstemmed | Polymer Nanocomposites for Photocatalytic Degradation and Photoinduced Utilizations of Azo-Dyes |
title_short | Polymer Nanocomposites for Photocatalytic Degradation and Photoinduced Utilizations of Azo-Dyes |
title_sort | polymer nanocomposites for photocatalytic degradation and photoinduced utilizations of azo-dyes |
topic | Review |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8069933/ https://www.ncbi.nlm.nih.gov/pubmed/33918713 http://dx.doi.org/10.3390/polym13081215 |
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