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Controlled growth of TiO2 nanoparticles on graphene by hydrothermal method for visible-light photocatalysis

This work presents the controlled synthesis of TiO2/graphene photocatalysts by hydrothermal method using TiCl4 as the precursor. The influence of the precursor concentration and the reaction time on the growth of TiO2 nanoparticles on graphene is studied and results in the ability to achieve the cat...

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Main Authors:	Thanh-Lieu T.Le, Thanh-Hiep T.Le, Kim Nguyen Van, Hao Van Bui, Truong Giang Le, VienVo
Format:	Bài trích
Language:	eng
Published:	Journal of Science: Advanced Materials and Devices 2021
Subjects:	TiO2/graphene photocatalysts Visible light photocatalysis Graphene-based photocatalysis
Online Access:	https://www.sciencedirect.com/science/article/pii/S2468217921000484?via%3Dihub https://dlib.phenikaa-uni.edu.vn/handle/PNK/2843 https://doi.org/10.1016/j.jsamd.2021.07.003
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spelling	oai:localhost:PNK-28432022-08-17T05:54:47Z Controlled growth of TiO2 nanoparticles on graphene by hydrothermal method for visible-light photocatalysis Thanh-Lieu T.Le Thanh-Hiep T.Le Kim Nguyen Van Hao Van Bui Truong Giang Le VienVo TiO2/graphene photocatalysts Visible light photocatalysis Graphene-based photocatalysis This work presents the controlled synthesis of TiO2/graphene photocatalysts by hydrothermal method using TiCl4 as the precursor. The influence of the precursor concentration and the reaction time on the growth of TiO2 nanoparticles on graphene is studied and results in the ability to achieve the catalysts with desired TiO2 loadings and dispersion. By means of XPS, Raman, and UV-VIS diffuse reflectance spectroscopies, the chemical composition, the interaction between TiO2 and graphene, and the optical properties of the photocatalysts are investigated. The results reveal that the coupling with graphene considerably narrows the bandgap of TiO2, which stimulates the photocatalytic activity of TiO2/graphene under visible light irradiation. The photocatalytic performance of TiO2/graphene is studied by the degradation of RhB, which is carried out for the catalysts with TiO2 loadings in the range of 5–84%. The highest performance is achieved for the catalysts containing well-dispersed TiO2 nanoparticles on the graphene surface with loadings in the range between 16.5 and 26%. The degradation mechanism of RhB is further elucidated by using carrier and radical scavengers, which reveal the dominating role of holes and OH∗ radicals. 2021-09-14T07:14:53Z 2021-09-14T07:14:53Z 2021 Bài trích https://www.sciencedirect.com/science/article/pii/S2468217921000484?via%3Dihub https://dlib.phenikaa-uni.edu.vn/handle/PNK/2843 https://doi.org/10.1016/j.jsamd.2021.07.003 eng Journal of Science: Advanced Materials and Devices
institution	Digital Phenikaa
collection	Digital Phenikaa
language	eng
topic	TiO2/graphene photocatalysts Visible light photocatalysis Graphene-based photocatalysis
spellingShingle	TiO2/graphene photocatalysts Visible light photocatalysis Graphene-based photocatalysis Thanh-Lieu T.Le Thanh-Hiep T.Le Kim Nguyen Van Hao Van Bui Truong Giang Le VienVo Controlled growth of TiO2 nanoparticles on graphene by hydrothermal method for visible-light photocatalysis
description	This work presents the controlled synthesis of TiO2/graphene photocatalysts by hydrothermal method using TiCl4 as the precursor. The influence of the precursor concentration and the reaction time on the growth of TiO2 nanoparticles on graphene is studied and results in the ability to achieve the catalysts with desired TiO2 loadings and dispersion. By means of XPS, Raman, and UV-VIS diffuse reflectance spectroscopies, the chemical composition, the interaction between TiO2 and graphene, and the optical properties of the photocatalysts are investigated. The results reveal that the coupling with graphene considerably narrows the bandgap of TiO2, which stimulates the photocatalytic activity of TiO2/graphene under visible light irradiation. The photocatalytic performance of TiO2/graphene is studied by the degradation of RhB, which is carried out for the catalysts with TiO2 loadings in the range of 5–84%. The highest performance is achieved for the catalysts containing well-dispersed TiO2 nanoparticles on the graphene surface with loadings in the range between 16.5 and 26%. The degradation mechanism of RhB is further elucidated by using carrier and radical scavengers, which reveal the dominating role of holes and OH∗ radicals.
format	Bài trích
author	Thanh-Lieu T.Le Thanh-Hiep T.Le Kim Nguyen Van Hao Van Bui Truong Giang Le VienVo
author_facet	Thanh-Lieu T.Le Thanh-Hiep T.Le Kim Nguyen Van Hao Van Bui Truong Giang Le VienVo
author_sort	Thanh-Lieu T.Le
title	Controlled growth of TiO2 nanoparticles on graphene by hydrothermal method for visible-light photocatalysis
title_short	Controlled growth of TiO2 nanoparticles on graphene by hydrothermal method for visible-light photocatalysis
title_full	Controlled growth of TiO2 nanoparticles on graphene by hydrothermal method for visible-light photocatalysis
title_fullStr	Controlled growth of TiO2 nanoparticles on graphene by hydrothermal method for visible-light photocatalysis
title_full_unstemmed	Controlled growth of TiO2 nanoparticles on graphene by hydrothermal method for visible-light photocatalysis
title_sort	controlled growth of tio2 nanoparticles on graphene by hydrothermal method for visible-light photocatalysis
publisher	Journal of Science: Advanced Materials and Devices
publishDate	2021
url	https://www.sciencedirect.com/science/article/pii/S2468217921000484?via%3Dihub https://dlib.phenikaa-uni.edu.vn/handle/PNK/2843 https://doi.org/10.1016/j.jsamd.2021.07.003
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score	8.891145

Controlled growth of TiO2 nanoparticles on graphene by hydrothermal method for visible-light photocatalysis

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