1. 华南农业大学工程学院，广东 广州 510000
2. School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
3. 华南农业大学电子工程学院，广东 广州 510000
4. 华南农业大学工程基础教学与训练中心，广东 广州 510000
Spectral Characteristics of Ag3PO4/GO on Nickel Foam and Photocatalytic Degradation of Ethylene Under Visible Light
JI Bang1,2, ZHAO Wen-feng3, DUAN Jie-li4, FU Lan-hui1, MA Li-zhe3, YANG Zhou1*
1. College of Engineering, South China Agricultural University, Guangzhou 510000, China
2. School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
3. College of Electronic Engineering, South China Agricultural University, Guangzhou 510000, China
4. Engineering Fundamental Teaching and Training Center, South China Agricultural University, Guangzhou 510000, China
Abstract：Ethylene released during storage and transportation of fruits and vegetables is the main factor for post-harvest spoilage of fruits and vegetables. Therefore, how to reduce or remove the ethylene released during the storage and transportation of fruits and vegetables has become an urgent problem to be solved. Photocatalytic oxidation technology is widely used in air purification, sewage treatment and energy fields due to its characteristics of energy saving, environmental protection and pollution-free. In this paper, photocatalytic degradation of organic pollutants was used to prepare a thin film photocatalyst and used it for photocatalytic degradation of ethylene. A series of metal nickel foam supported silver phosphate/graphene oxide (Ag3PO4/GO) composites film was prepared by using the silver nitrate as the silver source and the three-dimensional metal nickel foam as the carrier. The samples were characterized by X-ray diffraction (XRD), Ultraviolet-visible absorption spectroscopy (UV-Vis), Raman spectroscopy (Raman), Scanning electron microscopy (SEM), Fluorescence spectroscopy (PL), X-ray photoelectron spectroscopy (XPS). The results show that the pore structure is formed on the surface of the nickel foamed after corrosion oxidation treatment, which provides more adhesion sites for the catalyst and is favorable for catalyst adhesion. The Ag3PO4/GO film was successfully loaded on the surface of the 3D metal nickel foam, and the addition of GO did not change the crystal structure of Ag3PO4. After adding GO into Ag3PO4, the absorbance in the visible light region changed significantly. As the amount of GO increased, the absorbance of the sample in the visible light region increased. The addition of GO inhibits the recombination of photogenerated electron-hole pairs, which was conducive to improving the photocatalytic performance. Taking ethylene as the degradation target, the effect of different GO mass percentage of Ag3PO4 films on photocatalytic degradation of ethylene under visible light was investigated. The kinetic analysis of the photocatalytic degradation process was also carried out. The results show that Ag3PO4/GO composite film exhibits good photocatalytic activity and cyclic stability under visible light, and the photocatalytic degradation of ethylene can be improved by adding appropriate GO. The sample AG/NF-2 (the mass percentage of GO is 2% of Ag3PO4) has the highest photocatalytic activity, and the photocatalytic rate constant is 1.72×10-3 min-1, which was 181.96% higher than that of pure Ag3PO4. The stability of the photocatalytic degradation of ethylene in AG/NF-2 samples was tested. The results show that the introduction of GO inhibits the photocatalytic corrosion of Ag3PO4 and the photocatalytic stability is stable. Finally, the mechanism of photocatalytic degradation of ethylene by nickel foam supported Ag3PO4/GO thin film was also proposed. This work will bring about a potential application of photocatalytic technology in the field of fruit and vegetable preservation.
季 邦，赵文锋，段洁利，付兰慧，马立哲，杨 洲. 泡沫镍网负载Ag3PO4/GO的光谱特性及光催化降解乙烯性能研究[J]. 光谱学与光谱分析, 2020, 40(09): 2743-2750.
JI Bang, ZHAO Wen-feng, DUAN Jie-li, FU Lan-hui, MA Li-zhe, YANG Zhou. Spectral Characteristics of Ag3PO4/GO on Nickel Foam and Photocatalytic Degradation of Ethylene Under Visible Light. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2020, 40(09): 2743-2750.
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