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Photocatalytic degradation of an organophosphorus pesticide using a ZnO/rGO composite

A zinc oxide (ZnO)/reduced graphene oxide (rGO) nanocomposite was synthesized via a hydrothermal synthesis method and used for the photocatalytic degradation of dimethoate. In the synthesis process of the ZnO/rGO nanocomposite, hexamethylenetetramine (HMT) was used as both a mineralizer and reducing...

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Autores principales: Zhu, Zihan, Guo, Feng, Xu, Zhonghao, Di, Xiaoxuan, Zhang, Qian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9122623/
https://www.ncbi.nlm.nih.gov/pubmed/35685612
http://dx.doi.org/10.1039/d0ra01741h
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author Zhu, Zihan
Guo, Feng
Xu, Zhonghao
Di, Xiaoxuan
Zhang, Qian
author_facet Zhu, Zihan
Guo, Feng
Xu, Zhonghao
Di, Xiaoxuan
Zhang, Qian
author_sort Zhu, Zihan
collection PubMed
description A zinc oxide (ZnO)/reduced graphene oxide (rGO) nanocomposite was synthesized via a hydrothermal synthesis method and used for the photocatalytic degradation of dimethoate. In the synthesis process of the ZnO/rGO nanocomposite, hexamethylenetetramine (HMT) was used as both a mineralizer and reducing agent. When the ZnO nanoparticles formed on the surfaces of graphene oxide sheets, the sheets were simultaneously reduced by HMT to form rGO. The photodegradation rate and photodegradation efficiency of dimethoate by the ZnO/rGO nanocomposite were 4 and 1.5 times, respectively, higher than those of bare ZnO. The ZnO/rGO nanocomposite possessed a high surface area of 41.0 m(2) g(−1) and pore volume of 4.72 × 10(−3) cm(3) g(−1), which were conducive to the adsorption and mass transfer of pesticides and oxygen. The enhanced photocatalytic performance of the ZnO/rGO nanocomposite was attributed to the decrease in electron–hole recombination rate and effective carrier transport caused by the presence of rGO. Photoelectrochemical measurements confirmed that the nanocomposite exhibited a high charge transfer rate at the ZnO/rGO interface. These results indicate that ZnO/rGO nanocomposites have great application potential in pollutant degradation.
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spelling pubmed-91226232022-06-08 Photocatalytic degradation of an organophosphorus pesticide using a ZnO/rGO composite Zhu, Zihan Guo, Feng Xu, Zhonghao Di, Xiaoxuan Zhang, Qian RSC Adv Chemistry A zinc oxide (ZnO)/reduced graphene oxide (rGO) nanocomposite was synthesized via a hydrothermal synthesis method and used for the photocatalytic degradation of dimethoate. In the synthesis process of the ZnO/rGO nanocomposite, hexamethylenetetramine (HMT) was used as both a mineralizer and reducing agent. When the ZnO nanoparticles formed on the surfaces of graphene oxide sheets, the sheets were simultaneously reduced by HMT to form rGO. The photodegradation rate and photodegradation efficiency of dimethoate by the ZnO/rGO nanocomposite were 4 and 1.5 times, respectively, higher than those of bare ZnO. The ZnO/rGO nanocomposite possessed a high surface area of 41.0 m(2) g(−1) and pore volume of 4.72 × 10(−3) cm(3) g(−1), which were conducive to the adsorption and mass transfer of pesticides and oxygen. The enhanced photocatalytic performance of the ZnO/rGO nanocomposite was attributed to the decrease in electron–hole recombination rate and effective carrier transport caused by the presence of rGO. Photoelectrochemical measurements confirmed that the nanocomposite exhibited a high charge transfer rate at the ZnO/rGO interface. These results indicate that ZnO/rGO nanocomposites have great application potential in pollutant degradation. The Royal Society of Chemistry 2020-03-24 /pmc/articles/PMC9122623/ /pubmed/35685612 http://dx.doi.org/10.1039/d0ra01741h Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Zhu, Zihan
Guo, Feng
Xu, Zhonghao
Di, Xiaoxuan
Zhang, Qian
Photocatalytic degradation of an organophosphorus pesticide using a ZnO/rGO composite
title Photocatalytic degradation of an organophosphorus pesticide using a ZnO/rGO composite
title_full Photocatalytic degradation of an organophosphorus pesticide using a ZnO/rGO composite
title_fullStr Photocatalytic degradation of an organophosphorus pesticide using a ZnO/rGO composite
title_full_unstemmed Photocatalytic degradation of an organophosphorus pesticide using a ZnO/rGO composite
title_short Photocatalytic degradation of an organophosphorus pesticide using a ZnO/rGO composite
title_sort photocatalytic degradation of an organophosphorus pesticide using a zno/rgo composite
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9122623/
https://www.ncbi.nlm.nih.gov/pubmed/35685612
http://dx.doi.org/10.1039/d0ra01741h
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