Highly stable Au/Ag core–shell nanoparticles prepared via novel green approach for the abatement of nitro pollutants

Micro & nano letters

article

Vishal Verma¹  Maninder Singh¹  Prit Pal Singh²  Jagpreet Singh¹  Mohit Rawat¹ 

[1] Department of Nanotechnology, Sri Guru Granth Sahib World University;Department of Chemistry, Sri Guru Granth Sahib World University

关键词: gold;    silver;    nanofabrication;    catalysis;    reduction (chemical);    catalysts;    nanoparticles;    reaction rate constants;    core-shell nanostructures;    surface chemistry;    organic compounds;    water treatment;    water pollution control;    catalytic potential;    nitro pollutants;    stabilising agent;    Au–Ag core–shell nanoparticles;    Ananas comosus leaves extract;    reducing agent;    4-nitrophenol;    4-aminophemol;    pseudofirst-order kinetic law;    apparent rate constant;    Au-Ag;   

DOI  :  10.1049/mnl.2020.0275

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

The development of a benign, cost-effective and eco-friendly system for the removal of pollutants from water is an ongoing challenge. In this regard, the authors first time explored a clean and sustainable mean for the synthesis of Au/Ag core–shell nanoparticles (NPs) using Ananas comosus leaves extract as a reducing and stabilising agent. Spectroscopic and microscopic techniques confirmed the formation of Au/Ag core–shell NPs with an average size range between 5 and 10 nm. The synthesised Au/Ag core–shell NPs showed the excellent catalytic potential for the reduction of 4-nitrophenol into 4-aminophemol within 15 min. Kinetic study explicates that the catalytic reaction obeys the pseudo-first-order kinetic law with an apparent rate constant ( k app ) of 0.03 min −1 . Moreover, Au–Ag core–shell NPs showed exceptional stability over a long period (three months). Thus, this study provides a positive step towards the development of novel green catalysts.

【 授权许可】

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