通过琼脂糖水凝胶中生成的还原氧化石墨烯以疏水作用力驱动从水中去除有机化合物
Hydrophobic-Force-Driven Removal of Organic Compounds from Water by Reduced Graphene Oxides Generated in Agarose Hydrogels.
作者信息
Cheng Chongling, Cai Yongqing, Guan Guijian, Yeo Leslie, Wang Dayang
机构信息
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 13001, China.
School of Engineering, RMIT University, Melbourne, VIC, 3001, Australia.
出版信息
Angew Chem Int Ed Engl. 2018 Aug 27;57(35):11177-11181. doi: 10.1002/anie.201803834. Epub 2018 Aug 1.
Hydrophobic reduced graphene oxides (rGOs) were generated in agarose hydrogel beads (AgarBs) by NaBH reduction of graphene oxides (GOs) initially loaded in the AgarBs. The resulting rGO-loaded AgarBs were able to effectively adsorb organic compounds in water as a result of the attractive hydrophobic force between the rGOs in the AgarBs and the organic compounds dissolved in aqueous media. The adsorption capacity of the rGOs was fairly high even toward reasonably water-soluble organic compounds such as rhodamine B (321.7 mg g ) and aspirin (196.4 mg g ). Yet they exhibited salinity-enhanced adsorption capacity and preferential adsorption of organic compounds with lower solubility in water. Such peculiar adsorption behavior highlights the exciting possibility for adopting an adsorption strategy, driven by hydrophobic forces, in practical wastewater treatment processes.
通过对最初负载于琼脂糖水凝胶珠（AgarBs）中的氧化石墨烯（GOs）进行硼氢化钠还原，在琼脂糖水凝胶珠中生成了疏水性还原氧化石墨烯（rGOs）。所得负载rGO的琼脂糖水凝胶珠能够有效吸附水中的有机化合物，这是由于琼脂糖水凝胶珠中的rGOs与溶解在水介质中的有机化合物之间存在吸引力。即使对于诸如罗丹明B（321.7 mg g）和阿司匹林（196.4 mg g）等具有一定水溶性的有机化合物，rGOs的吸附容量也相当高。然而，它们表现出盐度增强的吸附容量以及对水中溶解度较低的有机化合物的优先吸附。这种特殊的吸附行为凸显了在实际废水处理过程中采用由疏水力驱动的吸附策略的令人兴奋的可能性。
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