磁性石墨烯@聚多巴胺纳米复合材料分离去除水中双酚A

本文通过水热法和多巴胺的自我团聚反应合成了磁性石墨烯@聚多巴胺(PDA@MG)纳米复合材料,该材料具有表面积大,含有丰富的π电子共轭体系、很好的水溶液分散性,易分离及可重复使用等特点。以PDA@MG为吸附剂材料,研究了其对水溶液中双酚A(BPA)的吸附性能。考察了吸附时间、温度、溶液的pH、吸附剂的用量等因素对该材料吸附性能的影响。结果表明在优化实验条件下,PDA@MG对BPA的最大吸附容量为151.3mg/g。PDA@MG具有优异的循环吸附性能,经过10次循环使用后其吸附能力没有明显减弱。

Removal of Bisphenol A from Water Using Polydopamine Coated Magnetic Graphene as Adsorption Materials

Polydopamine coated magnetic graphene(PDA@MG) nanocomposites were synthesized via a simple solvothermal reaction and self-polymerization of dopamine.The PDA@MG has several advantages such as large surface area,abundant π-electron system,good hydrophilicity,fast separation ability,repeatable use.The elimination of bisphenol A from aqueous solution by adsorption on PDA@MG was investigated.Batch experiments were conducted to investigate the impact of shake time,temperature,pH,and PDA@MG amount on the adsorption features of bisphenol onto PDA@MG.The maximum adsorption capacity of PDA@MG for bisphenol A was 151.3 mg/g at 20 ℃.PDA@MG has excellent adsorption properties of circulation.The results showed that the magnetic adsorbent could be reused at least 10 times without a significant loss of the sorption capacity.