石墨烯的制备及其对重金属Pb^(2+)离子的吸附性能研究  

Preparation of graphene and adsorptive property for heavy Metal Pb^(2+) ions

作　　者：柴静[1] 胡南滔[1] 朱齐荣[2] 高润纲[1] 张正岳 杨志[1] 张亚非[1] 

机构地区：[1]上海交通大学微纳科学技术研究院,薄膜与微细技术教育部重点实验室,上海200240 [2]上海交通大学分析测试中心,上海200240 [3]上海交通大学材料科学与工程学院,上海200240

出　　处：《化工新型材料》2014年第1期77-79,89,共4页New Chemical Materials

基　　金：国家高技术研究发展计划重大项目(863计划;2011AA050504);国家自然科学基金项目(51102164);上海市浦江人才计划资助项目(11PJD011);上海高校特聘教授(东方学者)岗位计划资助项目;上海交通大学理工交叉研究基金(No.X198052)

摘　　要：用乙酰丙酮还原氧化石墨制备得到石墨烯,其可在水、丙酮、N,N-二甲基甲酰胺等极性溶剂中超声分散,其中以水作为溶剂其分散性最好(浓度约为0.7g/L)。通过原子力显微镜(AFM)测定石墨烯的厚度为0.68nm,表明石墨烯是单层。红外光谱(IR)和紫外可见光谱(UV-Vis)数据表明乙酰丙酮被化学功能化修饰到石墨烯表面,且红外光谱中羧基峰的消失表明氧化石墨被乙酰丙酮还原。通过电感耦合等离子体发射光谱仪(ICP-AES)测定吸附后离子浓度,用Langmuir吸附等温式计算得到石墨烯对于Pb2+的最大吸附量为105.4mg/g,相关系数r为0.99958,Langmuir常数b为3.65。研究表明:石墨烯对水溶液中重金属Pb2+离子具有优异的吸附性能,这主要归因于石墨烯的巨大比表面积和乙酰丙酮分子对Pb2+离子的强络合能力。Graphene （GR） can be obtained by easily reduced graphene oxide （CO） by acetylacetone, which often can be used as an excellent reducing agent. The as-prepared GR can be dispersed in water, acetone, N, N-dimethylformamide and so on. The results showed that GR can be dispersed in water with the best dispersibility （0. 7 g/L）. Furthermore, GR sheet with the thickness of 0. 68 nm can be observed by atomic force microscope （AFM）. Fourier transform infrared （FTIR） spectroscopy and ultraviolet-visible （UV-Vis） spectroscopy of GR was also studied and proved the successful achievement of the reduction process. Finally, the adsorptive properties of GR were studied and the results suggested that the resultant GR can be used as an excellent absorbent for Pb2＋. The concentration of Pb2＋ after adsorbed by GR was determined by inductively coupled plasma atomic emission spectrometer （ICP-AES）. The maximum adsorption of Pb2＋ , the correlation coefficient （r）, and Langmuir constant （b） calculated by Langmuir absorption equation were 105.4 rag/g, 0. 99958, and 3.65, respectively. It demonstrated that Pb2＋ can be adsorbed by GR owing to the large surface area of GR and the strong complexation ability of acetylacetone to Pb2＋.

关 键 词：乙酰丙酮 氧化石墨 石墨烯 重金属Pb^2+离子 吸附性能 

分 类 号：O647.31[理学—物理化学] X52[理学—化学]