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Construction of Ag-modified TiO(2)/ZnO heterojunction nanotree arrays with superior photocatalytic and photoelectrochemical properties
The work involves the preparation of TiO(2)/ZnO heterojunction nanotree arrays by a three-step: hydrothermal, sol–gel, and secondary hydrothermal method, and then modification of Ag quantum dots (QDs). In the above process, the ZnO nanoparticles attached to the TiO(2) surface were subjected to secon...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9056850/ https://www.ncbi.nlm.nih.gov/pubmed/35514379 http://dx.doi.org/10.1039/d0ra06596j |
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author | Xu, Kang Liu, Zhu Qi, Shihan Yin, Zhuangzhuang Deng, Shangkun Zhang, Miao Sun, Zhaoqi |
author_facet | Xu, Kang Liu, Zhu Qi, Shihan Yin, Zhuangzhuang Deng, Shangkun Zhang, Miao Sun, Zhaoqi |
author_sort | Xu, Kang |
collection | PubMed |
description | The work involves the preparation of TiO(2)/ZnO heterojunction nanotree arrays by a three-step: hydrothermal, sol–gel, and secondary hydrothermal method, and then modification of Ag quantum dots (QDs). In the above process, the ZnO nanoparticles attached to the TiO(2) surface were subjected to secondary growth by a hydrothermal method to form a unique nanotree structure with TiO(2), followed by Ag quantum dot modification by quantum dot deposition. In summary, TiO(2)/ZnO nanotree arrays are cited for the first time. The prepared Ag-modified TiO(2)/ZnO heterojunction nanotree arrays were found to exhibit enhanced photoelectrochemical and photocatalytic properties. The photocurrent of the Ag-modified TiO(2)/ZnO heterojunction nanotree arrays is increased by 8-fold compared to the pure TiO(2) nanorod arrays, the photocatalytic degradation rate within 180 minutes increased from 37% to 77% and the kinetic rate constants for the degradation of methyl orange were three times higher than the pure TiO(2) nanorod arrays. The improved performance is partly due to the introduction of the TiO(2)/ZnO heterojunction nanotree arrays which provide Ag QDs with greater adhesion area. Localized surface plasmon resonance (LSPR) leads to an increase in the intensity of absorbed light due to the modification of Ag QDs. On the other hand the generation of the TiO(2)/ZnO heterojunction decreases the forbidden band width, resulting in the redshift of the light absorption edge. Therefore, TiO(2)/ZnO heterojunction nanotree arrays are expected to play an important role in solar cells and photocatalytic materials. |
format | Online Article Text |
id | pubmed-9056850 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90568502022-05-04 Construction of Ag-modified TiO(2)/ZnO heterojunction nanotree arrays with superior photocatalytic and photoelectrochemical properties Xu, Kang Liu, Zhu Qi, Shihan Yin, Zhuangzhuang Deng, Shangkun Zhang, Miao Sun, Zhaoqi RSC Adv Chemistry The work involves the preparation of TiO(2)/ZnO heterojunction nanotree arrays by a three-step: hydrothermal, sol–gel, and secondary hydrothermal method, and then modification of Ag quantum dots (QDs). In the above process, the ZnO nanoparticles attached to the TiO(2) surface were subjected to secondary growth by a hydrothermal method to form a unique nanotree structure with TiO(2), followed by Ag quantum dot modification by quantum dot deposition. In summary, TiO(2)/ZnO nanotree arrays are cited for the first time. The prepared Ag-modified TiO(2)/ZnO heterojunction nanotree arrays were found to exhibit enhanced photoelectrochemical and photocatalytic properties. The photocurrent of the Ag-modified TiO(2)/ZnO heterojunction nanotree arrays is increased by 8-fold compared to the pure TiO(2) nanorod arrays, the photocatalytic degradation rate within 180 minutes increased from 37% to 77% and the kinetic rate constants for the degradation of methyl orange were three times higher than the pure TiO(2) nanorod arrays. The improved performance is partly due to the introduction of the TiO(2)/ZnO heterojunction nanotree arrays which provide Ag QDs with greater adhesion area. Localized surface plasmon resonance (LSPR) leads to an increase in the intensity of absorbed light due to the modification of Ag QDs. On the other hand the generation of the TiO(2)/ZnO heterojunction decreases the forbidden band width, resulting in the redshift of the light absorption edge. Therefore, TiO(2)/ZnO heterojunction nanotree arrays are expected to play an important role in solar cells and photocatalytic materials. The Royal Society of Chemistry 2020-09-18 /pmc/articles/PMC9056850/ /pubmed/35514379 http://dx.doi.org/10.1039/d0ra06596j Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Xu, Kang Liu, Zhu Qi, Shihan Yin, Zhuangzhuang Deng, Shangkun Zhang, Miao Sun, Zhaoqi Construction of Ag-modified TiO(2)/ZnO heterojunction nanotree arrays with superior photocatalytic and photoelectrochemical properties |
title | Construction of Ag-modified TiO(2)/ZnO heterojunction nanotree arrays with superior photocatalytic and photoelectrochemical properties |
title_full | Construction of Ag-modified TiO(2)/ZnO heterojunction nanotree arrays with superior photocatalytic and photoelectrochemical properties |
title_fullStr | Construction of Ag-modified TiO(2)/ZnO heterojunction nanotree arrays with superior photocatalytic and photoelectrochemical properties |
title_full_unstemmed | Construction of Ag-modified TiO(2)/ZnO heterojunction nanotree arrays with superior photocatalytic and photoelectrochemical properties |
title_short | Construction of Ag-modified TiO(2)/ZnO heterojunction nanotree arrays with superior photocatalytic and photoelectrochemical properties |
title_sort | construction of ag-modified tio(2)/zno heterojunction nanotree arrays with superior photocatalytic and photoelectrochemical properties |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9056850/ https://www.ncbi.nlm.nih.gov/pubmed/35514379 http://dx.doi.org/10.1039/d0ra06596j |
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