Мақола

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

Ying WangInstitute of Environment and Ecology, Shandong Normal University, Jinan 250358, ChinaChuanxi YangSchool of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266525, ChinaYonglin LiuCollege of Geography and Environment, Shandong Normal University, Jinan 250358, ChinaYuqi FanInstitute of Environment and Ecology, Shandong Normal University, Jinan 250358, ChinaFeng DangKey Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Shandong University, Jinan 250061, ChinaYang QiuInstitute of Environment and Ecology, Shandong Normal University, Jinan 250358, ChinaHuimin ZhouInstitute of Environment and Ecology, Shandong Normal University, Jinan 250358, ChinaWeiliang WangSchool of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266525, ChinaYuzhen LiuCollege of Geography and Environment, Shandong Normal University, Jinan 250358, China

2021en

ABI

Аннотация

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.

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Идентификаторлар

DOI: 10.3390/w13223224

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