Shandong Provincial Key Laboratory of Corrosion Science, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China.
J Colloid Interface Sci. 2011 Aug 15;360(2):463-70. doi: 10.1016/j.jcis.2011.05.009. Epub 2011 May 11.
Graphene oxide (GO) nanosheets impregnated with silver nanoparticles (Ag NPs) were fabricated by the in situ reduction of adsorbed Ag(+) by hydroquinone (HQ) in a citrate buffer solution. Paper-like Ag NP/GO composite materials were fabricated owing to convenient structure characterization and antibacterial tests. The Ag NP/GO composites were characterized by UV-vis spectra, transmission electron microscope, electron diffraction, Raman spectroscopy, and field emission scanning electron microscope coupled with Energy Dispersive Spectrometer. Antibacterial activity was tested using Escherichia coli and Staphylococcus aureus as model strains of Gram negative and Gram positive bacteria, respectively. The as-prepared composites exhibit stronger antibacterial activity against both. The Ag NP/GO composites performed efficiently in bringing down the count of E. coli from 10(6) cfu/mL to zero with 45 mg/L GO in water. The micron-scale GO nanosheets (lateral size) enable them to be easily deposited on porous ceramic membranes during water filtration; making them a promising biocidal material for water disinfection.
氧化石墨烯（GO）纳米片通过在柠檬酸盐缓冲溶液中由对苯二酚（HQ）原位还原吸附的Ag(+)来制备。由于结构表征和抗菌测试方便，制备了纸状的Ag NP/GO 复合材料。Ag NP/GO 复合材料通过紫外可见光谱、透射电子显微镜、电子衍射、拉曼光谱和场发射扫描电子显微镜与能量色散光谱仪进行了表征。使用大肠杆菌和金黄色葡萄球菌分别作为革兰氏阴性菌和革兰氏阳性菌的模型菌株来测试抗菌活性。所制备的复合材料对两者均表现出更强的抗菌活性。在水中，45mg/L 的 GO 可将 10(6)cfu/mL 的大肠杆菌数量有效降低至零。微米级的 GO 纳米片（横向尺寸）使其在水过滤过程中能够轻易地沉积在多孔陶瓷膜上；使它们成为一种有前途的水消毒杀菌的杀生材料。
