功能化石墨烯吸附染料废水性能研究

Study on the Adsorption Performance of Functionalized Graphene for Dye Wastewater

本文利用聚乙烯吡咯烷酮(PVP)和石墨烯与染料分子的结合特性,合成了PVP功能化石墨烯纳米材料,对其进行了表征,应用紫外可见光光度仪分析了不同比例改性剂对酸性直接红染料的吸附效果,以及脱色与时间之间的关系,并考查该材料对水中酸性红染料的吸附能力。研究结果表明,PVP功能化石墨烯纳米材料对染料的吸附经离心作用,仅需0.010g石墨烯就可达到最高透射率33.5%,而未改性的石墨烯溶液需要0.025g以上质量的石墨烯才能达到此效果。因此,该材料在染料废水脱色方面具有很大的应用潜力与价值。

In this paper,using polyvinylpyrrolidone(PVP) and the binding characteristics of graphene and dye molecules,PVP functionalized graphene nanomaterials were synthesized,characterized,and UV-visible spectrophotometer was used to analyze different ratios of modifiers.The adsorption effect of acid direct red dye and the relationship between decolorization and time,and the adsorption capacity of the material to acid red dye in water was investigated.The research results show that the adsorption of dyes by PVP-functionalized graphene nanomaterials can reach the highest transmittance of 33.5% by centrifugal effect,while the unmodified graphene solution requires more than 0.025g of graphene.In order to achieve this effect.Therefore,the material has great application potential and value in the decolorization of dye wastewater.