修饰的氧化石墨烯负载碳纤维布的制备及吸附性能的研究

采用一步电泳沉积法在碳纤维布(CFC)上负载氢氧化镁修饰的氧化石墨烯(GO)纳米片,得到吸附材料CFC-GO@Mg(OH)2,并对其形貌和离子吸附能力进行实验分析。实验结果表明:1)CFC表面负载的GO@Mg(OH)2呈三维交联网状多孔结构;2) CFC-GO@Mg(OH)2对二价重金属离子Pb^2+、Cu^2+、Cd^2+和Ni^2+具有很好的吸附效果,其吸附容量随p H的升高而增大;3) CFC-GO@Mg(OH)2对M^2+的吸附速率均更好地符合准二级动力学方程,约15 min达到吸附平衡;4) CFC-GO@Mg(OH)2对M^2+的吸附等温线符合Langmuir模型,吸附过程为单层化学吸附。

Preparation and Research on the Adsorption Property of Modified Graphene Oxide Loaded Carbon Fiber Cloth

The Mg(OH)2 modified graphene oxide( GO) nanosheets were loaded on the carbon fiber cloth( CFC) by one-step electrodeposition( CFC-GO@ Mg(OH)2),and morphology and ion adsorption capacity of the material were experimented. The experimental results showed that: 1) The deposit on the surface of CFC was a mixture of Mg( OH)2 and GO,which had a three-dimensional cross-linked porous structure. 2) The material showed high adsorption capacity for divalent heavy metal ions Cd^2+,Pb^2+,Cu^2+ and Ni^2+,and the adsorption capacity increased with increasing pH values. 3) The adsorption rates of Pb^2+,Cu^2+,Cd^2 + and Ni^2+ by CFC-GO@ Mg(OH)2 were all well described by pseudo-second-order rate equation,and the adsorption reached equilibrium in approximately 15 minutes. 4) Adsorption isotherm of CFC-GO@ Mg(OH)2 on M^2+ fitted Langmuir model well,suggesting that adsorption process was monolayer chemical adsorption.