2,2′-二吡啶胺功能化多壁碳纳米管吸附富集-原子吸收光谱法测定水中痕量铜  

AAS Determination of Copper in Water After Enrichment by Adsorption on Bipyridylamine-Functionalized Multi-wall Carbon Nanotubes

作　　者：刘珊[1] 崔国崴 胡张军[3] 王筱平[1] 郑卫新[4] 李田[3] 

机构地区：[1]同济大学化学系,上海200092 [2]山东大成农药股份有限公司,淄博255009 [3]同济大学污染控制与资源化国家重点实验室,上海200092 [4]杭州师范大学材料与化学化工学院,杭州310036

出　　处：《理化检验（化学分册）》2010年第5期471-474,共4页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：中国博士后自然基金(20080440646);国家"十一五"科技支撑计划(2008BAJ08B13);浙江省自然科学基金(Y406341)

摘　　要：采用二氯亚砜对羧基化多壁碳纳米管进行改性,用2,2′-二吡啶胺对其表面进行修饰,得到新型吸附材料2,2′-二吡啶胺功能化多壁碳纳米管（MWCNT-Dipy）,对其结构及其对水中铜离子的吸附性能进行了研究。结果表明：当介质的pH值为6时,振荡吸附15 min达到平衡,饱和吸附容量为3.2 mg.g-1,吸附在2,2′-二吡啶胺功能化多壁碳纳米管上的铜（Ⅱ）可用1.0 mol.L-1盐酸溶液6 mL完全洗脱,用原子吸收光谱法测定此洗脱液中铜（Ⅱ）的含量。方法用于纯净水中痕量铜（Ⅱ）的吸附富集和测定,加标回收率在94.3%-96.9%之间。The intermediate of acyl-chlorinated multi-wall carbon nanotubes（MWCNT′s） was prepared by the modification reaction of carboxylated MWCNT′s with SOCl2,and the object material,2,2′-bipyridylamine functionalized MWCNT′s（MWCNT-Dipy） were prepared by the reaction with 2,2′-bipyridylamine in DMF medium.Structure of the MWCNT-Dipy and its adsorptivity toward Cu2＋-ion in water were studied in detail.In an aqueous medium of pH 6,the MWCNT-Dipy behaved to adsorb Cu2＋-ion strongly and equilibrium of adsorption was achieved by shaking with MWCNT-Dipy for 15 min,and the adsorptive capacity of Cu2＋-ion at equilibrium was 3.2 mg·g-1.The Cu2＋-ion adsorbed on the surface of MWCNT-Dipy was completed desorbed by shaking with 6 mL of 1.0 mol·L-1 HCl solution,in which the copper content was determined by AAS.Recovery was tested on samples of pure water by standard addition method,giving results of recovery in the range of 94.3%-96.9%.

关 键 词：多壁碳纳米管 2 2′-二吡啶胺 铜(Ⅱ) 吸附富集 

分 类 号：O657.31[理学—分析化学]