Staff View: TiO2 Inverse Opals Modified by Ag Nanoparticles: A Synergic Effect of Enhanced Visible-Light Absorption and Efficient Charge Separation for Visible-Light Photocatalysis

TiO2 Inverse Opals Modified by Ag Nanoparticles: A Synergic Effect of Enhanced Visible-Light Absorption and Efficient Charge Separation for Visible-Light Photocatalysis

This work reports on the synthesis, characterization, and photocatalytic performance of the TiO2 inverse opal nanostructure (IP-TiO2) and the IP-TiO2 modified by Ag nanoparticles (Ag@IP-TiO2). The IP-TiO2 is fabricated using polystyrene spheres as the template and TiCl4 as the precursor, and the Ag@...

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Main Authors:	Thanh-Hiep Thi Le, Thanh-Trang Bui, Hao Van Bui, Van-Duong Dao, Loan Le Thi Ngoc
Format:	Bài trích
Language:	eng
Published:	Catalysts 2021
Subjects:	titanium dioxide inverse opals visible-light photocatalysis
Online Access:	https://www.mdpi.com/2073-4344/11/7/761 https://dlib.phenikaa-uni.edu.vn/handle/PNK/2845 https://doi.org/10.3390/catal11070761
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spelling	oai:localhost:PNK-28452022-08-17T05:54:48Z TiO2 Inverse Opals Modified by Ag Nanoparticles: A Synergic Effect of Enhanced Visible-Light Absorption and Efficient Charge Separation for Visible-Light Photocatalysis Thanh-Hiep Thi Le Thanh-Trang Bui Hao Van Bui Van-Duong Dao Loan Le Thi Ngoc titanium dioxide inverse opals visible-light photocatalysis This work reports on the synthesis, characterization, and photocatalytic performance of the TiO2 inverse opal nanostructure (IP-TiO2) and the IP-TiO2 modified by Ag nanoparticles (Ag@IP-TiO2). The IP-TiO2 is fabricated using polystyrene spheres as the template and TiCl4 as the precursor, and the Ag@IP-TiO2 is realized by photoreduction method. The morphological, structural, and optical properties of the materials are investigated by scanning electron microscopy, X-ray diffraction, ultraviolet–visible (UV-VIS) absorption spectroscopy, and photoluminescence spectroscopy. Their photocatalytic performances are studied by the degradation of rifampicin antibiotic under the visible-light irradiation generated by an LED lamp. The results demonstrate that the IP-TiO2 is composed of mesopores arranged in the honeycomb structure and strongly absorbs visible light in the wavelength range of 400–500 nm. This facilitates the visible-light catalytic activity of IP-TiO2, which is further enhanced by the surface modification by Ag nanoparticles. Our studies on the UV-VIS absorption and photoluminescent properties of the materials reveal that the presence of Ag nanoparticles not only enhances the visible-light absorption of IP-TiO2, but also reduces the recombination of photogenerated electrons and holes. These two factors create a synergic effect that causes the enhanced photocatalytic performance of Ag@IP-TiO2. 2021-09-14T07:14:53Z 2021-09-14T07:14:53Z 2021 Bài trích https://www.mdpi.com/2073-4344/11/7/761 https://dlib.phenikaa-uni.edu.vn/handle/PNK/2845 https://doi.org/10.3390/catal11070761 eng application/pdf Catalysts
institution	Digital Phenikaa
collection	Digital Phenikaa
language	eng
topic	titanium dioxide inverse opals visible-light photocatalysis
spellingShingle	titanium dioxide inverse opals visible-light photocatalysis Thanh-Hiep Thi Le Thanh-Trang Bui Hao Van Bui Van-Duong Dao Loan Le Thi Ngoc TiO2 Inverse Opals Modified by Ag Nanoparticles: A Synergic Effect of Enhanced Visible-Light Absorption and Efficient Charge Separation for Visible-Light Photocatalysis
description	This work reports on the synthesis, characterization, and photocatalytic performance of the TiO2 inverse opal nanostructure (IP-TiO2) and the IP-TiO2 modified by Ag nanoparticles (Ag@IP-TiO2). The IP-TiO2 is fabricated using polystyrene spheres as the template and TiCl4 as the precursor, and the Ag@IP-TiO2 is realized by photoreduction method. The morphological, structural, and optical properties of the materials are investigated by scanning electron microscopy, X-ray diffraction, ultraviolet–visible (UV-VIS) absorption spectroscopy, and photoluminescence spectroscopy. Their photocatalytic performances are studied by the degradation of rifampicin antibiotic under the visible-light irradiation generated by an LED lamp. The results demonstrate that the IP-TiO2 is composed of mesopores arranged in the honeycomb structure and strongly absorbs visible light in the wavelength range of 400–500 nm. This facilitates the visible-light catalytic activity of IP-TiO2, which is further enhanced by the surface modification by Ag nanoparticles. Our studies on the UV-VIS absorption and photoluminescent properties of the materials reveal that the presence of Ag nanoparticles not only enhances the visible-light absorption of IP-TiO2, but also reduces the recombination of photogenerated electrons and holes. These two factors create a synergic effect that causes the enhanced photocatalytic performance of Ag@IP-TiO2.
format	Bài trích
author	Thanh-Hiep Thi Le Thanh-Trang Bui Hao Van Bui Van-Duong Dao Loan Le Thi Ngoc
author_facet	Thanh-Hiep Thi Le Thanh-Trang Bui Hao Van Bui Van-Duong Dao Loan Le Thi Ngoc
author_sort	Thanh-Hiep Thi Le
title	TiO2 Inverse Opals Modified by Ag Nanoparticles: A Synergic Effect of Enhanced Visible-Light Absorption and Efficient Charge Separation for Visible-Light Photocatalysis
title_short	TiO2 Inverse Opals Modified by Ag Nanoparticles: A Synergic Effect of Enhanced Visible-Light Absorption and Efficient Charge Separation for Visible-Light Photocatalysis
title_full	TiO2 Inverse Opals Modified by Ag Nanoparticles: A Synergic Effect of Enhanced Visible-Light Absorption and Efficient Charge Separation for Visible-Light Photocatalysis
title_fullStr	TiO2 Inverse Opals Modified by Ag Nanoparticles: A Synergic Effect of Enhanced Visible-Light Absorption and Efficient Charge Separation for Visible-Light Photocatalysis
title_full_unstemmed	TiO2 Inverse Opals Modified by Ag Nanoparticles: A Synergic Effect of Enhanced Visible-Light Absorption and Efficient Charge Separation for Visible-Light Photocatalysis
title_sort	tio2 inverse opals modified by ag nanoparticles: a synergic effect of enhanced visible-light absorption and efficient charge separation for visible-light photocatalysis
publisher	Catalysts
publishDate	2021
url	https://www.mdpi.com/2073-4344/11/7/761 https://dlib.phenikaa-uni.edu.vn/handle/PNK/2845 https://doi.org/10.3390/catal11070761
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score	8.8894005

TiO2 Inverse Opals Modified by Ag Nanoparticles: A Synergic Effect of Enhanced Visible-Light Absorption and Efficient Charge Separation for Visible-Light Photocatalysis

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