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首先以石墨粉为原材料,通过Hummers方法合成了氧化石墨烯(GO);将GO溶胶与预处理的壳聚糖(CS)进行复合,制得GO/CS复合吸附材料,通过SEM扫描电镜对材料进行了表征,并就其对水中铜离子(Cu2+)的吸附性能进行了研究。结果表明,复合材料的最佳吸附条件为pH=9,用量为20mg,吸附时间为10min,吸附率达88%。吸附过程的研究显示,该吸附行为符合Freundlich等温线模型。材料重复使用5次,吸附效果无下降,可用于水中微量Cu~(2+)的吸附。
Firstly, graphene oxide (GO) was synthesized by the Hummers method using graphite powder as raw material. GO sols and CS composite adsorbents were prepared by combining GO sol and pretreated chitosan (CS). SEM Were characterized, and their adsorption of copper (Cu2 +) in water was studied. The results showed that the optimal adsorption conditions for the composite material were pH = 9, dosage of 20 mg, adsorption time of 10 min and adsorption rate of 88%. The adsorption process studies show that the adsorption behavior in line with the Freundlich isotherm model. The material is reused for 5 times without any decrease in adsorption efficiency and can be used for the adsorption of Cu 2+ in water.