Silver nanoparticles with large surface area and surface available atoms provide promising opportunities to deal with the challenges in catalysis and environmental remediation. Herein, silver nanoparticles impregnated reduced graphene oxide (AgNPs@RGO) is synthesized through the in-situ reduction process using green guava fruit extract as a reducing agent. The synthesized materials are characterized by multiple characterization tools such as FTIR, XRD, UV–Vis, XPS, Raman, FESEM and TEM studies. X-ray photoelectron spectroscopic (XPS) result has confirmed the in-situ reduction of GO and Ag⁺ ions to RGO and Ag^o, respectively. Morphological studies like FESEM and TEM have suggested well dispersion of AgNPs onto the RGO sheets. The synthesized material showed improved efficiency for the catalytic reduction of water-pollutant like p-nitrophenol. Here, the catalyst works as a hydrogen transport. The AgNPs@RGO material also showed efficient catalytic activity for terminal alkyne carboxylation up to 98.5% of product yield. The catalyst is reusable for multiple reaction cycles for both the studied reactions.

Graphic Abstract

中文翻译：

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一锅绿色合成AgNPs @ RGO在温和反应条件下的去除水污染物和化学固定CO 2

具有大表面积和表面可利用原子的银纳米颗粒为应对催化和环境修复方面的挑战提供了广阔的机遇。本文中，使用绿色番石榴果实提取物作为还原剂，通过原位还原工艺合成了浸渍有纳米银的还原型氧化石墨烯（AgNPs @ RGO）。合成材料具有多种表征工具，如FTIR，XRD，UV-Vis，XPS，拉曼，FESEM和TEM研究。X射线光电子能谱（XPS）结果已证实GO和Ag ⁺离子原位还原为RGO和Ag ^o， 分别。FESEM和TEM等形态学研究表明，AgNP很好地分散在RGO板上。所合成的材料显示出对对硝基苯酚等水污染物的催化还原效率提高。在此，催化剂用作氢传输。AgNPs @ RGO材料还显示出高达90.5％的收率，对末端炔烃羧化具有有效的催化活性。该催化剂可在两个已研究的反应的多个反应循环中重复使用。

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