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首页> 外文期刊>Crystal growth & design >Enhanced Catalytic Reduction of p-Nitrophenol on Ultrathin MoS2 Nanosheets Decorated with Noble Metal Nanoparticles
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Enhanced Catalytic Reduction of p-Nitrophenol on Ultrathin MoS2 Nanosheets Decorated with Noble Metal Nanoparticles

机译：在用贵金属纳米粒子装饰的超薄MOS2纳米片上增强催化还原对硝基苯酚

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摘要

In this work, ultrathin MoS2 nanosheets (MoS2 NSs) with defect-rich structure were prepared and used as for the reduction of p-nitropheonol. Also, thanks to the defect sites, noble metal (Au, Ag, Pd, Pt) nanoparticles (NPs) can be successfully deposited on the MoS2 NSs via a facile and efficient one-step photochemical reduction process without the assistance of a stabilizer. The morphology and crystal structure of as-synthesized materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and N-2 physisorption mearurements. Catalytic results demonstrate that as-prepared MoS2 NSs and noble metal modified MoS2 NSs (NM/MoS2 NSs) effectively catalyze the reduction of p-nitrophenol (p-NP) to p-aminophenol (p-AP) with NaBH4. The Pd/MoS2 NSs shows the best catalytic performance, exhibiting an apparent rate constant (K-app) of 0.386 min(-1) even with moderate chemical stability. Interestingly, the activity of MoS2 NSs is comparable to and even higher than previously studied noble metal-based catalysts. Moreover, the good reusability without significant activity loss suggests that MoS2 NSs can be a strong candidate for sustainable chemical catalysis. The origins of the high catalytic activity are also discussed and a probable reaction mechanism is suggested. The present work opens up new opportunities for the future design and fabrications of versatile MoS2 based composite materials.
机译：在这项工作中，制备具有缺陷缺陷结构的超薄MOS2纳米片（MOS2 NSS）并用作降低p-硝基洛洛尔。此外，由于缺陷部位，贵金属（AU，AG，Pd，PT）纳米颗粒（NPS）可以通过容易和有效的一步的光化学还原过程成功地沉积在MOS2 NS上，而不会稳定器的辅助。用X射线衍射（XRD），扫描电子显微镜（SEM），透射电子显微镜（TEM），X射线光电子体光谱（XPS）和N-2物理吸附的形态和晶体结构。催化结果表明，制备的MOS2 NSS和贵金属改性MOS2 NSS（NM / MOS2 NSS）有效地将对氨基苯酚（P-NP）的降低与NaBH 4的降低至对氨基苯酚（P-AP）。 PD / MOS2 NSS显示出最佳的催化性能，即使具有中等化学稳定性，表现出0.386分钟（-1）的表观速率常数（K-APP）。有趣的是，MOS2 NSS的活性与先前研究的贵金属基催化剂相当。此外，没有显着活动损失的良好可重用性表明MOS2 NSS可以是可持续化学催化的强烈候选者。还讨论了高催化活性的起源，并提出了可能的反应机制。目前的工作为未来的多功能MOS2复合材料的设计和制造开辟了新的机会。

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  • 来源
    《Crystal growth & design》 |2017年第6期|共10页
  • 作者

    Qiao Xiu-Qing; Zhang Zhen-Wei; Tian Feng-Yu; Hou Dong-Fang; Tian Zheng-Fang; Li Dong-Sheng; Zhang Qichun;

  • 作者单位

    China Three Gorges Univ Key Lab Inorgan Nonmetall Crystalline &

    Energy Co Hubei Prov Collaborat Innovat Ctr New Energy Micr Coll Mat &

    Chem Engn Yichang 443002 Peoples R China;

    China Three Gorges Univ Key Lab Inorgan Nonmetall Crystalline &

    Energy Co Hubei Prov Collaborat Innovat Ctr New Energy Micr Coll Mat &

    Chem Engn Yichang 443002 Peoples R China;

    China Three Gorges Univ Key Lab Inorgan Nonmetall Crystalline &

    Energy Co Hubei Prov Collaborat Innovat Ctr New Energy Micr Coll Mat &

    Chem Engn Yichang 443002 Peoples R China;

    China Three Gorges Univ Key Lab Inorgan Nonmetall Crystalline &

    Energy Co Hubei Prov Collaborat Innovat Ctr New Energy Micr Coll Mat &

    Chem Engn Yichang 443002 Peoples R China;

    Huanggang Normal Univ Hubei Key Lab Proc &

    Applicat Catalyt Mat Huanggang 438000 Peoples R China;

    China Three Gorges Univ Key Lab Inorgan Nonmetall Crystalline &

    Energy Co Hubei Prov Collaborat Innovat Ctr New Energy Micr Coll Mat &

    Chem Engn Yichang 443002 Peoples R China;

    Nanyang Technol Univ Sch Mat Sci &

    Engn Singapore 639798 Singapore;

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  • 正文语种 eng
  • 中图分类 晶体学;
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