New Carbon Materials ( IF 6.5 ) Pub Date : 2019-11-20 , DOI: 10.1016/s1872-5805(19)60024-7 Kai-rong Xiong , Ye-ru Liang , Yi Ou-yang , Ding-cai Wu , Ruo-wen Fu
Advanced antimicrobial agents that treat infectious diseases are greatly needed. Various silver-based nanomaterials have been developed and are considered potential candidates for many commercial products, but they lack durability and adequate antibacterial activity. A new class of nanohybrids of silver nanoparticles (AgNPs) grown in-situ on graphene oxide (GO) using a silver ion salt was synthesized by a simple ultrasonic mixing method. The structure and composition of the nanohybrids were investigated by SEM, TEM, FTIR, TGA, XRD and XPS. Results indicated that GO acts not only as a negatively charged macromolecule for capturing Ag+ ions, but also a reducing agent to reduce the Ag+ ions to AgNPs. The heterogeneous structure leads to abundant well-dispersed AgNPs and Ag+ ions on the GO support. The as-prepared nanohybrids make full use of the advantages of both AgNPs and GO-Ag+ salts, leading to improved and long-term antibacterial activity against both S.aureus and E. coli.
中文翻译:
在氧化石墨烯银离子盐上原位生长的银纳米颗粒的纳米杂化物:简单的合成及其增强的抗菌活性
非常需要用于治疗传染病的高级抗菌剂。已经开发了各种基于银的纳米材料,它们被认为是许多商业产品的潜在候选者,但是它们缺乏耐用性和足够的抗菌活性。通过一种简单的超声混合方法,合成了一类新型的纳米银杂化物,即使用银离子盐在氧化石墨烯(GO)上原位生长的银纳米粒子(AgNPs)。通过SEM,TEM,FTIR,TGA,XRD和XPS对纳米杂化物的结构和组成进行了研究。结果表明,GO不仅充当捕获Ag +离子的带负电荷的大分子,而且还充当将Ag +离子还原成AgNPs的还原剂。异质结构导致大量分散良好的AgNP和Ag +离子在GO支座上。所制备的纳米复合物充分利用两者的AgNPs和GO-Ag的优点+盐,导致对两者改进的和长期抗菌活性的金黄色葡萄球菌和大肠杆菌。