Ma Jie, Yang Mingxuan, Yu Fei, Zheng Jie
State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, P. R. of China.
College of Chemistry and Environmental Engineering, Shanghai Institute of Technology, Shanghai 2001418, China.
Sci Rep. 2015 Sep 4;5:13578. doi: 10.1038/srep13578.
An environmentally benign and efficient hydrothermal reduction method was applied for the preparation of three-dimensional (3D) porous graphene hydrogel (GH) adsorbents. The physicochemical properties of GH granules were systematically characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectra and Brunauer-Emmett-Teller (BET) method. GH granules showed an excellent adsorption capacity (235.6 mg/g) for ciprofloxacin via combined adsorption interaction mechanisms (e.g. π-π EDA interaction, hydrogen bonding, and hydrophobic interaction). Moreover, reducing the size of the hydrogels can significantly accelerate the adsorption process and enhance the removal efficiency of pollutants from aqueous solution. Water (more than 99 wt%) within hydrogels played a key role in enhancing adsorption performance. The GO hydrogels exhibited an excellent adaptability to environmental factors. These findings demonstrate that GH granules are promising adsorbents for the removal of antibiotic pollutants from aqueous solutions.
采用一种环境友好且高效的水热还原法制备了三维（3D）多孔石墨烯水凝胶（GH）吸附剂。通过透射电子显微镜（TEM）、X射线衍射（XRD）、拉曼光谱和布鲁诺尔-埃米特-泰勒（BET）法对GH颗粒的物理化学性质进行了系统表征。通过联合吸附相互作用机制（如π-π电子给体-受体相互作用、氢键和疏水相互作用），GH颗粒对环丙沙星表现出优异的吸附容量（235.6 mg/g）。此外，减小水凝胶的尺寸可显著加速吸附过程并提高从水溶液中去除污染物的效率。水凝胶中的水（超过99 wt%）在增强吸附性能方面起关键作用。氧化石墨烯水凝胶对环境因素表现出优异的适应性。这些发现表明，GH颗粒是从水溶液中去除抗生素污染物的有前景的吸附剂。
