Abstract The present study involved the preparation of silver-reduced graphene oxide (Ag/rGO) using co-precipitation method. The characteristics of Ag/rGO were confirmed by X-ray Diffraction patterns, Fourier transformation infrared spectroscopy, Raman spectroscopy, transmission electron microscopy, Brunauer–Emmett–Teller specific surface area, scanning electron microscopy, and energy-dispersive spectroscopy. The results demonstrated that silver nanoparticles (AgNPs) having diameter of 16 ± 3.7 nm were uniformly integrated on reduced graphene oxide (rGO) The as-synthesized Ag/rGO had a specific area of 54m2/g and 67.36 wt% silver. Antibacterial and catalytic properties of Ag/rGO were then further investigated. Ag/rGO was found to effectively inhibit the developing of gram-negative and gram-positive bacteria such as Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa with the bactericidal rates of 89.35, 95.67, and 99.99 %, respectively. In addition, the catalytic property of Ag/rGO in the reduction of organic dyes was tested with different dosage of reducing agent, amount of catalyst, type of dye, and reaction time. More than 99 % of dyes in aqueous solution at 20 mg/L concentration were reduced after 30 min with amounts of Ag/rGO and sodium borohydride of 10 and 30 mg successively. All results confirmed the potential application of Ag/rGO in the treatment of infected water and dye contamination.

中文翻译：

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用于抗菌活性和催化还原有机染料的银/还原氧化石墨烯的合成

摘要 本研究涉及使用共沉淀法制备银还原氧化石墨烯 (Ag/rGO)。通过 X 射线衍射图、傅里叶变换红外光谱、拉曼光谱、透射电子显微镜、Brunauer-Emmett-Teller 比表面积、扫描电子显微镜和能量色散光谱证实了 Ag/rGO 的特性。结果表明，直径为 16 ± 3.7 nm 的银纳米粒子 (AgNPs) 均匀地集成在还原氧化石墨烯 (rGO) 上。合成的 Ag/rGO 具有 54m2/g 的比表面积和 67.36 wt% 的银。然后进一步研究了 Ag/rGO 的抗菌和催化性能。发现 Ag/rGO 可有效抑制革兰氏阴性和革兰氏阳性菌的发育，如金黄色葡萄球菌、大肠杆菌和铜绿假单胞菌的杀菌率分别为 89.35、95.67 和 99.99%。此外，还测试了不同还原剂用量、催化剂用量、染料类型和反应时间的Ag/rGO在有机染料还原中的催化性能。30 分钟后，浓度为 20 mg/L 的水溶液中超过 99% 的染料被还原，Ag/rGO 和硼氢化钠的量依次为 10 和 30 mg。所有结果都证实了 Ag/rGO 在处理受感染的水和染料污染中的潜在应用。和反应时间。30 分钟后，浓度为 20 mg/L 的水溶液中超过 99% 的染料被还原，Ag/rGO 和硼氢化钠的量依次为 10 和 30 mg。所有结果都证实了 Ag/rGO 在处理受感染的水和染料污染中的潜在应用。和反应时间。30 分钟后，浓度为 20 mg/L 的水溶液中超过 99% 的染料被还原，Ag/rGO 和硼氢化钠的量依次为 10 和 30 mg。所有结果都证实了 Ag/rGO 在处理受感染的水和染料污染中的潜在应用。