Department of Chemistry, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, Tanjung Malim, Perak, 35900, Malaysia.
Department of Nuclear Physics, University of Madras, Guindy Campus, Chennai, 600 025, Tamil Nadu, India.
Sci Rep. 2020 Feb 13;10(1):2586. doi: 10.1038/s41598-020-59491-5.
Exploring the new catalytic systems for the reduction of organic and inorganic pollutants from an indispensable process in chemical, petrochemical, pharmaceutical and food industries, etc. Hence, in the present work, authors motivated to synthesize bare reduced graphene oxide (rGO), polyaniline (PANI), three different ratios of rGO-PANI composites and rGO-PANI supported mono (Pd) & bimetallic [Pd: Au ] nanocomposite by a facile chemical reduction method. Also, it investigated their catalytic performances for the reduction of organic/inorganic pollutants and antimicrobial activities. All the freshly prepared bare rGO, PANI, three different ratios of rGO-PANI composites and rGO-PANI /Pd & Pd: Au nanocomposite hybrid catalysts were characterized using UV-Vis, FT-IR, SEM, FE-SEM, EDAX, HR-TEM, XRD, XPS and Raman spectroscopy analysis. Among them, an optimized best composition of rGO-PANI/Pd: Au bimetallic nanocomposite hybrid catalyst exhibits better catalytic reduction and antimicrobial activities than other composites, as a result of strong electrostatic interactions between rGO, PANI and bimetal (Pd: Au) NPs through a synergistic effect. Hence, an optimized rGO-PANI/Pd:Au bimetallic nanocomposite catalyst would be considered as a suitable catalyst for the reduction of different nitroarenes, organic dyes, heavy metal ions and also significantly inhibit the growth of S. aureus, S. Typhi as well as Candida albicans and Candida kruesi in wastewater.
探索新型催化体系，用于还原化学、石化、制药和食品等工业中不可或缺的有机和无机污染物。因此，在本工作中，作者受激励通过简便的化学还原法合成了裸露的还原氧化石墨烯（rGO）、聚苯胺（PANI）、三种不同比例的 rGO-PANI 复合材料和 rGO-PANI 负载的单（Pd）和双金属[Pd：Au]纳米复合材料。此外，还研究了它们对有机/无机污染物的还原和抗菌活性的催化性能。所有新制备的裸露 rGO、PANI、三种不同比例的 rGO-PANI 复合材料和 rGO-PANI/Pd 和 Pd：Au 纳米复合材料杂化催化剂均采用 UV-Vis、FT-IR、SEM、FE-SEM、EDAX、HR-TEM、XRD、XPS 和拉曼光谱分析进行了表征。其中，优化的最佳 rGO-PANI/Pd：Au 双金属纳米复合材料杂化催化剂具有比其他复合材料更好的催化还原和抗菌活性，这是由于 rGO、PANI 和双金属（Pd：Au）NPs 通过协同效应之间存在强静电相互作用。因此，优化的 rGO-PANI/Pd：Au 双金属纳米复合材料催化剂可被视为还原不同硝基芳烃、有机染料、重金属离子的合适催化剂，并且还可以显著抑制废水中文氏葡萄球菌、伤寒沙门氏菌以及白色念珠菌和克鲁氏假丝酵母的生长。
