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Synthesis and visible-light photocatalytic property of Ag/GO/g-C_3N_4 ternary composite

机译:Ag / GO / g-C_3N_4三元复合材料的合成及可见光催化性能

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摘要

Ag/GO/g-C_3N_4 composites were successfully synthesized by a sonochemical method. The structure and properties of the composites at various Ag loadings were characterized, and the Ag nanoparticles were confirmed by XRD, TEM and XPS measurements. UV-Vis diffuse reflectance spectra showed the presence of surface plasmon peak for Ag at 550 nm. The Ag/GO/g-C_3N_4 composites demonstrated excellent activity in photocatalytic degradation of Rh B under visible light irradiation, and 5% of Ag nanoparticle was found to be the most suitable loading. The enhanced photocatalytic activity was ascribed to the role of GO nanosheets and Ag nanoparticles. The GO nanosheets acted as electrons transporter and acceptor in the composite and inhibited the charge recombination. The Ag nanoparticles acted as an electron traps to facilitate the separation of photogenerated electron-hole pairs and promoted interfacial electrons transfer. The OH_(ads) and h~ were the major radicals to be involved in the photocatalytic process.
机译:通过声化学方法成功合成了Ag / GO / g-C_3N_4复合材料。表征了在不同的Ag负载量下复合材料的结构和性能,并通过XRD,TEM和XPS测量证实了Ag纳米颗粒。 UV-Vis漫反射光谱显示在550 nm处存在Ag的表面等离激元峰。 Ag / GO / g-C_3N_4复合材料在可见光照射下表现出出色的Rh B光催化降解活性,发现5%的Ag纳米颗粒是最合适的负载量。增强的光催化活性归因于GO纳米片和Ag纳米片的作用。 GO纳米片充当复合材料中的电子转运体和受体,并抑制电荷复合。 Ag纳米颗粒充当电子陷阱,以促进光生电子-空穴对的分离并促进界面电子转移。 OH_(ads)和h〜是参与光催化过程的主要自由基。

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  • 来源
    《Materials Science and Engineering》 |2017年第7期|1-9|共9页
  • 作者单位

    Rural Environmental Engineering Center of Qingdao, College of Resource and Environment, Qingdao Agricultural University, Qingdao 266109, China,College of Environmental Science and Engineering, Shandong University, Jinan 250100, China,State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China;

    Rural Environmental Engineering Center of Qingdao, College of Resource and Environment, Qingdao Agricultural University, Qingdao 266109, China;

    Rural Environmental Engineering Center of Qingdao, College of Resource and Environment, Qingdao Agricultural University, Qingdao 266109, China;

    Rural Environmental Engineering Center of Qingdao, College of Resource and Environment, Qingdao Agricultural University, Qingdao 266109, China;

    State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China;

    Rural Environmental Engineering Center of Qingdao, College of Resource and Environment, Qingdao Agricultural University, Qingdao 266109, China;

    College of Environmental Science and Engineering, Shandong University, Jinan 250100, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    g-C_3N_4; Graphene oxide; Ag nanoparticles; Photocatalytic degradation;

    机译:g-C_3N_4;氧化石墨烯;银纳米颗粒;光催化降解;

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