Solvothermal Synthesis of ZnO Nanoparticles for Photocatalytic Degradation of Methyl Orange and <i>p</i>-Nitrophenol

The photocatalytic degradation of organic pollutants is an effective method of controlling environmental pollution. ZnO nanoparticles (ZnO NPs) were prepared by the solvothermal method and characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (X...

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Autores principales:	Ying Wang, Chuanxi Yang, Yonglin Liu, Yuqi Fan, Feng Dang, Yang Qiu, Huimin Zhou, Weiliang Wang, Yuzhen Liu
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	ZnO solvothermal methyl orange <i>p</i>-nitrophenol Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
Acceso en línea:	https://doaj.org/article/a7ed9b5fdc834b619b2e09a334c2b285
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spelling	oai:doaj.org-article:a7ed9b5fdc834b619b2e09a334c2b2852021-11-25T19:15:42ZSolvothermal Synthesis of ZnO Nanoparticles for Photocatalytic Degradation of Methyl Orange and <i>p</i>-Nitrophenol10.3390/w132232242073-4441https://doaj.org/article/a7ed9b5fdc834b619b2e09a334c2b2852021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4441/13/22/3224https://doaj.org/toc/2073-4441The photocatalytic degradation of organic pollutants is an effective method of controlling environmental pollution. ZnO nanoparticles (ZnO NPs) were prepared by the solvothermal method and characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV–visible diffuse reflectance spectroscopy (UV–Vis DRS). The results showed that the ZnO NPs had a uniform size of 25–40 nm, hexagonal wurtzite structure, and a band gap of 2.99 eV. The photocatalytic degradation of methyl orange (MO) and <i>p</i>-nitrophenol (PNP) was used as a model reaction to evaluate the photocatalytic activity of ZnO NPs. The photocatalytic degradation rates (pseudo-first-order kinetics) of MO and PNP were 92% (0.0128 min<sup>−</sup><sup>1</sup>) and 56.2% (0.0042 min<sup>−</sup><sup>1</sup>), respectively, with a 25 W ultraviolet lamp, MO/PNP concentration = 20 mg/L, ZnO NPs dose = 1.5 g/L, and time = 180 min. The photocatalytic mechanism of ZnO NPs and degradation pathways of MO and PNP were also proposed. The results provide valuable information and guidance for the treatment of wastewater via photocatalytic methods.Ying WangChuanxi YangYonglin LiuYuqi FanFeng DangYang QiuHuimin ZhouWeiliang WangYuzhen LiuMDPI AGarticleZnOsolvothermalmethyl orange<i>p</i>-nitrophenolHydraulic engineeringTC1-978Water supply for domestic and industrial purposesTD201-500ENWater, Vol 13, Iss 3224, p 3224 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	ZnO solvothermal methyl orange <i>p</i>-nitrophenol Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
spellingShingle	ZnO solvothermal methyl orange <i>p</i>-nitrophenol Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 Ying Wang Chuanxi Yang Yonglin Liu Yuqi Fan Feng Dang Yang Qiu Huimin Zhou Weiliang Wang Yuzhen Liu Solvothermal Synthesis of ZnO Nanoparticles for Photocatalytic Degradation of Methyl Orange and <i>p</i>-Nitrophenol
description	The photocatalytic degradation of organic pollutants is an effective method of controlling environmental pollution. ZnO nanoparticles (ZnO NPs) were prepared by the solvothermal method and characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV–visible diffuse reflectance spectroscopy (UV–Vis DRS). The results showed that the ZnO NPs had a uniform size of 25–40 nm, hexagonal wurtzite structure, and a band gap of 2.99 eV. The photocatalytic degradation of methyl orange (MO) and <i>p</i>-nitrophenol (PNP) was used as a model reaction to evaluate the photocatalytic activity of ZnO NPs. The photocatalytic degradation rates (pseudo-first-order kinetics) of MO and PNP were 92% (0.0128 min<sup>−</sup><sup>1</sup>) and 56.2% (0.0042 min<sup>−</sup><sup>1</sup>), respectively, with a 25 W ultraviolet lamp, MO/PNP concentration = 20 mg/L, ZnO NPs dose = 1.5 g/L, and time = 180 min. The photocatalytic mechanism of ZnO NPs and degradation pathways of MO and PNP were also proposed. The results provide valuable information and guidance for the treatment of wastewater via photocatalytic methods.
format	article
author	Ying Wang Chuanxi Yang Yonglin Liu Yuqi Fan Feng Dang Yang Qiu Huimin Zhou Weiliang Wang Yuzhen Liu
author_facet	Ying Wang Chuanxi Yang Yonglin Liu Yuqi Fan Feng Dang Yang Qiu Huimin Zhou Weiliang Wang Yuzhen Liu
author_sort	Ying Wang
title	Solvothermal Synthesis of ZnO Nanoparticles for Photocatalytic Degradation of Methyl Orange and <i>p</i>-Nitrophenol
title_short	Solvothermal Synthesis of ZnO Nanoparticles for Photocatalytic Degradation of Methyl Orange and <i>p</i>-Nitrophenol
title_full	Solvothermal Synthesis of ZnO Nanoparticles for Photocatalytic Degradation of Methyl Orange and <i>p</i>-Nitrophenol
title_fullStr	Solvothermal Synthesis of ZnO Nanoparticles for Photocatalytic Degradation of Methyl Orange and <i>p</i>-Nitrophenol
title_full_unstemmed	Solvothermal Synthesis of ZnO Nanoparticles for Photocatalytic Degradation of Methyl Orange and <i>p</i>-Nitrophenol
title_sort	solvothermal synthesis of zno nanoparticles for photocatalytic degradation of methyl orange and <i>p</i>-nitrophenol
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/a7ed9b5fdc834b619b2e09a334c2b285
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Solvothermal Synthesis of ZnO Nanoparticles for Photocatalytic Degradation of Methyl Orange and <i>p</i>-Nitrophenol

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