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首页> 外文期刊>Optical Materials >Ternary nanocomposite ZnO-g-C_3N_4-Go for enhanced photocatalytic degradation of RhB
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Ternary nanocomposite ZnO-g-C_3N_4-Go for enhanced photocatalytic degradation of RhB

机译：三元纳米复合材料ZnO-G-C_3N_4-GO用于增强的RHB的光催化降解

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摘要

The degradation of organic dyes and other pollutants has always been one of the great challenges facing mankind today. So our work designed and improved a novel composite, by using zinc oxide (ZnO) nanoparticles to modify porous carbon nitride (g-C3N4), and then load graphene oxide (Go) nanosheets. These prepared binary and ternary composites with different weight ratios were subjected to a series of tests. The results showed that when the weight ratio of g-C3N4 was 40%, the binary composite ZnO-g-C(3)N(4 )transferred its absorption edge to lower energy and had the best photocatalytic performance. Moreover, the addition of Go immensely cut down the recombination of photo-generated carriers and enhanced the absorption in the visible light range. The ZnO-gC(3)N(4)(40%)-Go (15%) displayed 98% degradation efficiency in 100 min, the rate was about 2.23 times than ZnOg-C3N4(40%). XRD, XPS, TEM proved the successful hybridization of the composite, and PL explained the causes for the amendment of photocatalytic efficiency. The conduction band and valence band potential of the material were calculated by VB-XPS, and combined with the free radical capture experiment proved the most effective free radical in this experiment and proved the reaction mechanism of the photocatalytic reaction. Through the photocurrent and EIS the results analyzed the high responsivity of the material and the low photogenerated e-/ h(+) recombination rate. In brief, the interface effect and synergistic effect of the ternary heterojunction greatly enhanced the photocatalytic degradation of toxic dyes.
机译：有机染料和其他污染物的降解一直是人类今天面临的巨大挑战之一。因此，我们的工作通过使用氧化锌（ZnO）纳米颗粒来改变多孔碳氮化物（G-C3N4），然后载载氧化石墨烯（GO）纳米晶片。这些制备的二元和三元复合材料具有不同重量比的一系列测试。结果表明，当G-C3N4的重量比为40％时，二元复合ZnO-G-C（3）N（4）将其吸收边缘转移到降低能量并具有最佳的光催化性能。此外，添加持续削减光产生的载体的重组，并增强了可见光范围内的吸收。 ZnO-GC（3）N（4）（40％） - GO（15％）在100分钟内显示98％的降解效率，比Znog-C3N4（40％）的速率约为2.23倍。 XRD，XPS，TEM证明了复合材料的成功杂交，PL解释了光催化效率修正的原因。通过VB-XPS计算材料的传导带和价带电位，并与自由基捕获实验结合在该实验中证明了最有效的自由基，并证明了光催化反应的反应机理。通过光电流和EIS，结果分析了材料的高响应度和低光致的E- / H（+）重组率。简而言之，三元异质结的界面效应和协同效应大大提高了有毒染料的光催化降解。

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  • 来源
    《Optical Materials》 |2021年第9期|111351.1-111351.9|共9页
  • 作者

    Zhang Jiaqi; Li Jin; Liu Xiangyu;

  • 作者单位

    Xinjiang Univ Xinjiang Key Lab Solid State Phys & Devices Urumqi 830046 Xinjiang Peoples R China|Xinjiang Univ Sch Phys Sci & Technol Urumqi 830046 Xinjiang Peoples R China;

    Xinjiang Univ Xinjiang Key Lab Solid State Phys & Devices Urumqi 830046 Xinjiang Peoples R China|Xinjiang Univ Sch Phys Sci & Technol Urumqi 830046 Xinjiang Peoples R China;

    Xinjiang Univ Xinjiang Key Lab Solid State Phys & Devices Urumqi 830046 Xinjiang Peoples R China|Xinjiang Univ Sch Phys Sci & Technol Urumqi 830046 Xinjiang Peoples R China;

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

    ZnO nanoparticles; Go; Ternary nanocomposite; Photocatalytic degradation of RhB; g-C3N4;

    机译：ZnO纳米粒子;去;三元纳米复合材料;光催化降解RHB;G-C3N4;

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