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Water
Volume 13
Issue 22
10.3390/w13223224
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Article

Solvothermal Synthesis of ZnO Nanoparticles for Photocatalytic Degradation of Methyl Orange and p-Nitrophenol

by
Ying Wang
1,†,
Chuanxi Yang
2,†,
Yonglin Liu
2,
Yuqi Fan
1,
Feng Dang
3,
Yang Qiu
1,
Huimin Zhou
1,
Weiliang Wang
2,* and
Yuzhen Liu
4,*
1
Institute of Environment and Ecology, Shandong Normal University, Jinan 250358, China
2
School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266525, China
3
Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Shandong University, Jinan 250061, China
4
College of Geography and Environment, Shandong Normal University, Jinan 250358, China
*
Authors to whom correspondence should be addressed.
†
These authors are co-first authors on this work.
Academic Editors: Andreas N. Angelakis, Weihua Zhao, Kai Wang and Shanyun Wang
Water 2021, 13(22), 3224; https://doi.org/10.3390/w13223224
Received: 9 October 2021 / Revised: 21 October 2021 / Accepted: 9 November 2021 / Published: 13 November 2021
(This article belongs to the Special Issue Advances in Wastewater Treatment: Resources Recovery, Energy Neutralization, Water Reuse)
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Abstract

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 p-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−1) and 56.2% (0.0042 min−1), 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. View Full-Text
Keywords: ZnO; solvothermal; methyl orange; p-nitrophenol ZnO; solvothermal; methyl orange; p-nitrophenol
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MDPI and ACS Style

Wang, Y.; Yang, C.; Liu, Y.; Fan, Y.; Dang, F.; Qiu, Y.; Zhou, H.; Wang, W.; Liu, Y. Solvothermal Synthesis of ZnO Nanoparticles for Photocatalytic Degradation of Methyl Orange and p-Nitrophenol. Water 2021, 13, 3224. https://doi.org/10.3390/w13223224

AMA Style

Wang Y, Yang C, Liu Y, Fan Y, Dang F, Qiu Y, Zhou H, Wang W, Liu Y. Solvothermal Synthesis of ZnO Nanoparticles for Photocatalytic Degradation of Methyl Orange and p-Nitrophenol. Water. 2021; 13(22):3224. https://doi.org/10.3390/w13223224

Chicago/Turabian Style

Wang, Ying, Chuanxi Yang, Yonglin Liu, Yuqi Fan, Feng Dang, Yang Qiu, Huimin Zhou, Weiliang Wang, and Yuzhen Liu. 2021. "Solvothermal Synthesis of ZnO Nanoparticles for Photocatalytic Degradation of Methyl Orange and p-Nitrophenol" Water 13, no. 22: 3224. https://doi.org/10.3390/w13223224

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