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首页> 外文期刊>Chemosphere >Plasmonic ZnO/Au/g-C_3N_4 nanocomposites as solar light active photocatalysts for degradation of organic contaminants in wastewater
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Plasmonic ZnO/Au/g-C_3N_4 nanocomposites as solar light active photocatalysts for degradation of organic contaminants in wastewater

机译：等离子体ZnO / Au / G-C_3N_4纳米复合材料作为太阳能光学活性光催化剂，用于废水中有机污染物的降解

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摘要

In the present study, novel ZnO/Au/graphitic carbon nitride (g-C3N4) nanocomposites were fabricated via a facile and eco-friendly liquid phase pulsed laser process followed by calcination. Notably, the approach did not necessitate the use of any capping agents or surfactants. The as-prepared photocatalysts were evaluated by various electron microscopy and spectroscopy techniques. The obtained results confirmed good dispersion of the Au nanoparticles (NPs) on the surface of spherical ZnO particles deposited on the g-C3N4 nanosheets. The ZnO/Au/g-C3N4 nanocomposite exhibited substantially enhanced catalytic activity toward the degradation of methylene blue (MB) under simulated solar light irradiation. In particular, the ZnO/Au15/g-C3N4 composite containing 15 wt% Au displayed a rate constant, which was approximately 3 and 5 times greater than those of pristine g-C3N4 and ZnO, respectively. This improved photocatalytic activity of ZnO/Au15/g-C3N4 was attributed to the surface plasmon resonance of Au NPs and the synergistic effects between ZnO and g-C3N4. The boundary between ZnO/Au and g-C3N4 enabled direct migration of the photogenerated electrons from g-C3N4 to ZnO/Au, which hindered the recombination of electronehole pairs and enhanced the carrier separation efficiency. Additionally, a plausible MB degradation mechanism over the ZnO/Au/g-C3N4 photocatalyst is proposed based on the results of the conducted scavenger study. (C) 2020 Elsevier Ltd. All rights reserved.
机译：在本研究中，通过煅烧，通过容易和环保的液相脉冲激光方法制造新的ZnO / Au /石墨氮化物（G-C3N4）纳米复合材料，然后进行煅烧。值得注意的是，该方法不需要使用任何封端剂或表面活性剂。通过各种电子显微镜和光谱技术评估AS制备的光催化剂。所得结果证实了Au纳米颗粒（NPS）在沉积在G-C3N4纳米晶片上的球形ZnO颗粒表面上的良好分散。 ZnO / Au / G-C3N4纳米复合材料在模拟的太阳光照射下表现出基本上增强的催化活性朝向亚甲基蓝（MB）的降解。特别地，含有15wt％Au的ZnO / Au15 / g-C3N4复合材料显示出速率常数，其分别比原始G-C3N4和ZnO大约3倍和5倍。这种改善的ZnO / Au15 / G-C3N4的光催化活性归因于Au nps的表面等离子体共振以及ZnO和G-C3N4之间的协同效应。 ZnO / Au和G-C3N4之间的边界使得光发生的电子从G-C3N4直接迁移到ZnO / Au，这阻碍了电阻对的重组并提高了载流子分离效率。另外，基于所进行的清除剂研究的结果，提出了ZnO / Au / G-C3N4光催化剂上的可粘合的MB降解机制。 （c）2020 elestvier有限公司保留所有权利。

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  • 来源
    《Chemosphere》 |2021年第3期|128262.1-128262.10|共10页
  • 作者

    Lee Seung Jun; Begildayeva Talshyn; Jung Hyeon Jin; Koutavarapu Ravindranadh; Yu Yiseul; Choi Moonhee; Choi Myong Yong;

  • 作者单位

    Gyeongsang Natl Univ Dept Chem BK21 Four Jinju 52828 South Korea|Gyeongsang Natl Univ Res Inst Nat Sci Jinju 52828 South Korea;

    Gyeongsang Natl Univ Dept Chem BK21 Four Jinju 52828 South Korea|Gyeongsang Natl Univ Res Inst Nat Sci Jinju 52828 South Korea;

    Korea Inst Ceram Engn & Technol Nanomat & Nanotechnol Ctr Elect Convergence Div 101 Soho Ro Jinju 52851 South Korea;

    Gyeongsang Natl Univ Dept Chem BK21 Four Jinju 52828 South Korea|Gyeongsang Natl Univ Res Inst Nat Sci Jinju 52828 South Korea;

    Gyeongsang Natl Univ Dept Chem BK21 Four Jinju 52828 South Korea|Gyeongsang Natl Univ Res Inst Nat Sci Jinju 52828 South Korea;

    Korea Inst Ceram Engn & Technol Nanomat & Nanotechnol Ctr Elect Convergence Div 101 Soho Ro Jinju 52851 South Korea;

    Gyeongsang Natl Univ Dept Chem BK21 Four Jinju 52828 South Korea|Gyeongsang Natl Univ Res Inst Nat Sci Jinju 52828 South Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Nanocomposites; Photocatalyst; Solar light irradiation; Pulsed laser ablation; Surface plasmon resonance; Methylene blue;

    机译：纳米复合材料;光催化剂;太阳光照射;脉冲激光烧蚀;表面等离子体共振;亚甲基蓝色;

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