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首页> 外文期刊>Materials Letters >Facile synthesis of carbon-supported silver nanoparticles as an efficient reduction catalyst for aqueous 2-methyl-p-nitrophenol
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Facile synthesis of carbon-supported silver nanoparticles as an efficient reduction catalyst for aqueous 2-methyl-p-nitrophenol

机译：轻松合成碳负载的银纳米颗粒，作为2-甲基-对硝基苯酚水溶液的有效还原催化剂

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摘要

A facile technique for preparing the stable Ag nanoparticles (NPs) of 5-19 nm average size, anchored onto the heat-treated melamine-oxalic acid supramolecular complex is demonstrated. The synthesized material is tested for its catalytic efficiency towards reduction of aqueous 2-CH3-p-nitrophenol to aminophenol using NaBH4 as reducing agent at 28 degrees C. The reaction followed the pseudo first-order kinetics with respect to the nitrophenol concentrations, and the reaction rate constant was determined to be greater than the reported literature values. The superior catalytic activity of the catalyst was attributed to the combined roles of the Ag NPs and carbon substrate enriched with nitrogen functional groups. Notably, the prepared catalyst sustained its reactivity even after eight consecutive test runs without leaching of the metal NPs in the reaction mixture. The results clearly indicate the organic complex precursor-based carbon supported Ag NPs to be an efficient catalyst for removal of recalcitrant organic compounds from wastewater by reduction. (C) 2020 Elsevier B.V. All rights reserved.
机译：证明了一种容易的技术，用于制备固定在热处理的三聚氰胺-草酸超分子复合物中的平均粒径为5-19 nm的稳定Ag纳米颗粒（NP）。测试了合成材料在28°C下使用NaBH4作为还原剂对2-CH3-对硝基苯酚水溶液还原为氨基苯酚的催化效率。该反应遵循有关硝基苯酚浓度的拟一级动力学，确定反应速率常数大于报道的文献值。催化剂的优异催化活性归因于Ag NPs和富含氮官能团的碳底物的组合作用。值得注意的是，即使在连续八次测试运行后，所制备的催化剂也保持了其反应性，而没有浸出反应混合物中的金属NP。结果清楚地表明，基于有机配合物前体的碳载银纳米颗粒是通过还原去除废水中难降解有机化合物的有效催化剂。 （C）2020 Elsevier B.V.保留所有权利。

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  • 来源
    《Materials Letters》 |2020年第may15期|127546.1-127546.4|共4页
  • 作者

  • 作者单位

    Indian Inst Technol Kharagpur Dept Chem Engn Kharagpur 721302 W Bengal India;

    Hebrew Univ Jerusalem Fac Agr Food & Environm Dept Soil & Water Sci POB 12 IL-7610001 Rehovot Israel;

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

    Ag nanoparticles; Carbon materials; Catalytic reduction; Nitrophenol; Persistent organic pollutants; N-doping;

    机译：银纳米粒子;碳材料;催化还原;硝基苯酚;持久性有机污染物;N掺杂;

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