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  

Spectral Characteristics of AgPO/GO on Nickel Foam and Photocatalytic Degradation of Ethylene Under Visible Light

作　　者：季邦 赵文锋 段洁利 付兰慧 马立哲 杨洲[1] JI Bang;ZHAO Wen-feng;DUAN Jie-li;FU Lan-hui;MA Li-zhe;YANG Zhou(College of Engineering,South China Agricultural University,Guangzhou 510000,China;School of Materials Science and Engineering,Nanyang Technological University,Singapore 639798,Singapore;College of Electronic Engineering,South China Agricultural University,Guangzhou 510000,China;Engineering Fundamental Teaching and Training Center,South China Agricultural University,Guangzhou 510000,China)

机构地区：[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

出　　处：《光谱学与光谱分析》2020年第9期2743-2750,共8页Spectroscopy and Spectral Analysis

基　　金：现代农业产业技术体系建设专项资金项目(CARS-31);广东省科技计划项目(2018A050506076)资助。

摘　　要：果蔬储运过程中释放的乙烯是果蔬采后腐败变质的主要因素,如何减少或去除果蔬储运过程中释放的乙烯,成为果蔬保鲜领域亟待解决的问题。光催化氧化技术由于节能、环保和无污染等特点,在空气净化、污水处理和能源等领域应用非常广泛。利用光催化降解有机污染物的特性,制备了薄膜型光催化剂并用于光催化降解乙烯。以硝酸银为银源,三维金属泡沫镍网为载体,采用浸渍提拉法制备了一系列金属泡沫镍网负载磷酸银/氧化石墨烯(Ag3PO4/GO)薄膜复合材料,对所制备样品进行了X射线衍射(XRD)、紫外-可见吸收光谱(UV-Vis)、拉曼光谱(Raman)、扫描电子显微镜(SEM)、荧光光谱(PL)、 X射线光电子能谱(XPS)表征分析。结果表明:经过腐蚀氧化处理后的泡沫镍网表面形成了孔洞结构,为催化剂提供了更多的附着位点,利于催化剂的附着。Ag3PO4/GO薄膜成功负载在3D金属泡沫镍网表面, GO的引入并没有改变Ag3PO4的晶体结构。Ag3PO4中加入GO后,在可见光区的吸光度发生了明显的变化,随着GO量的增加,样品在可见光的吸收度增强, GO抑制了Ag3PO4中光生电子-空穴对的复合,有利于光催化性能的提升。以乙烯为降解目标,考察了可见光下不同GO质量百分比Ag3PO4/GO薄膜对光催化降解乙烯的影响,并对光催化降解过程进行了动力学分析,结果表明Ag3PO4/GO复合薄膜在可见光下表现出较强的光催化降解乙烯能力,加入适量GO可以明显的提升样品光催化降解乙烯的能力,样品AG/NF-2(GO占Ag3PO4质量百分数为2%)的光催化活性最高,光催化速率常数为1.72×10^-3 min^-1,与单一的Ag3PO4相比提高了181.96%,光催化活性显著提升。对AG/NF-2样品的光催化降解乙烯稳定性进行了测试,表明GO的引入,抑制了Ag3PO4的光腐蚀,光催化性能稳定。最后提出了泡沫镍网负载Ag3PO4/GO薄膜可见光催化降解乙烯的机理。本研究制备的薄膜�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 kineti

关 键 词：泡沫镍网 光催化降解 乙烯 磷酸银/氧化石墨烯 

分 类 号：O643[理学—物理化学]