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首页> 外文期刊>Chemistry: A European journal >Multimetallic Oxynitrides Nanoparticles for a New Generation of Photocatalysts
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Multimetallic Oxynitrides Nanoparticles for a New Generation of Photocatalysts

机译：用于新一代光催化剂的多金属氧纳米颗粒

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摘要

A versatile synthetic strategy for the preparation of multimetallic oxynitrides has been designed and here exemplarily discussed considering the preparation of nanoscaled zinc–gallium oxynitrides and zinc–gallium–indium oxynitrides, two important photocatalysts of new generation, which proved to be active in key energy related processes from pollutant decomposition to overall water splitting. The synthesis presented here allows the preparation of small nanoparticles (less than 20 nm in average diameter), well-defined in size and shape, yet highly crystalline and with the highest surface area reported so far (up to 80 m~2g~(-1)). X-ray diffraction studies show that the final material is not a mixture of single oxides but a distinctive compound. The photocatalytic properties of the oxynitrides have been tested towards the decomposition of an organic dye (as a model reaction for the decomposition of air pollutants), showing better photocatalytic performances than the corresponding pure phases (reaction constant 0.22 h~(-1)), whereas almost no reaction was observed in absence of catalyst or in the dark. The photocatalysts have been also tested for H_2 evolution (semi-reaction of the water splitting process) with results comparable to the best literature values but leaving room for further improvement.
机译：设计了一种用于制备多金属氧氮化物的通用合成策略，并且在此示例性地讨论了纳米级氧化铟镓和氧化铟镓氧化铟的制备，这是新一代的两个重要光催化剂，这被证明是有效的关键能源有效从污染物分解对整体水分裂的过程。这里呈现的合成允许制备小纳米颗粒（平均直径小于20nm），定义尺寸和形状，但迄今为止报道的最高表面积高（高达80 m〜2g〜（ - 1））。 X射线衍射研究表明，最终材料不是单氧化物的混合物，而是具有独特的化合物。已经测试了氧氮化物的光催化性质朝向有机染料的分解（作为用于分解空气污染物的模型反应），显示比相应的纯相比相应的纯相的光催化性能（反应常数0.22h〜（-1））然而，在没有催化剂或黑暗中，几乎没有观察到反应。已经测试了光催化剂的H_2进化（水分裂过程的半反应），结果与最佳文献值相当，但留下室外的进一步改善。

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  • 来源
    《Chemistry: A European journal》 |2019年第72期|共7页
  • 作者

    Tingke Rao; Maria Luisa Saladino; Yuanxing Fang; Xinchen Wang; Cristina Giordano;

  • 作者单位

    School of Biological and Chemical Science Chemistry Department Queen Mary University of London Mile End Road London E1 4NS (UK);

    Dipartimento Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche STEBICEF and INSTM UdR Palermo Università di Palermo Viale delle Scienze pad. 17 Palermo 90128 (Italy);

    State Key Laboratory of Photocatalysis on Energy and Environment College of Chemistry Fuzhou University Fuzhou 350002 (P. R. China);

    State Key Laboratory of Photocatalysis on Energy and Environment College of Chemistry Fuzhou University Fuzhou 350002 (P. R. China);

    School of Biological and Chemical Science Chemistry Department Queen Mary University of London Mile End Road London E1 4NS (UK);

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 应用化学;
  • 关键词

    dye decomposition; multimetallic nitrides; oxynitrides; urea glass route; water splitting;

    机译：染料分解;多金属氮化物;氧氮化物;尿素玻璃途径;水分裂;

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