Zhang Huixuan, Deng Xiaoyong, Ma Qiuling, Cui Yuqi, Cheng Xiuwen, Xie Mingzheng, Li Xiaoli, Cheng Qingfeng
Key Laboratory of Western China's Environmental Systems (Ministry of Education) and Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, P. R. China.
College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, P. R. China.
J Nanosci Nanotechnol. 2018 Apr 1;18(4):2304-2309. doi: 10.1166/jnn.2018.14533.
In this study, silver decorated graphene oxide (Ag/GO) composite was fabricated through a reduction process in the presence of potassium borohydride solution. Subsequently, physicochemical properties of the resulting Ag/GO composite were studied by scanning electron microscope, X-ray diffraction, Raman spectra, Fourier transformation infrared spectroscopy and UV-visible diffuse reflectance spectrum. Results indicated that Ag species existed in the form of Ag0, which greatly facilitated the visible light absorbance ability. Furthermore, the performance of Ag/GO was evaluated by PC inactiviation of Escherichia coli under Xenon lamp illumination. It was found that Ag/GO sample could kill the Escherichia coli within 60 min illumination by the non-selective attack of ⋅OH radicals. This study provides a novel and facile strategy to fabricate high-efficient catalyst to kill the bacteria in drinking water treatment.
在本研究中，通过在硼氢化钾溶液存在下的还原过程制备了银修饰的氧化石墨烯（Ag/GO）复合材料。随后，通过扫描电子显微镜、X射线衍射、拉曼光谱、傅里叶变换红外光谱和紫外可见漫反射光谱研究了所得Ag/GO复合材料的物理化学性质。结果表明，Ag以Ag0的形式存在，这极大地促进了可见光吸收能力。此外，通过在氙灯照射下对大肠杆菌进行光催化失活来评估Ag/GO的性能。结果发现，Ag/GO样品可通过·OH自由基的非选择性攻击在60分钟光照内杀死大肠杆菌。本研究提供了一种新颖且简便的策略来制备高效催化剂，用于饮用水处理中杀灭细菌。
