基于钯水凝胶的电化学传感器选择性检测水合肼  

Selective Determination of Hydrazine Hydrate on Palladium Hydrogels-modified Electrochemical Sensor

作　　者：柴瑞涛[1] 刘雨腾 张国[1] 朱维晃[2] 陈宇云[3] 冯建军 柴守宁[1] CHAI Rui-Tao;LIU Yu-Teng;ZHANG Guo;ZHU Wei-Huang;CHEN Yu-Yun;FENG Jian-Jun;CHAI Shou-Ning(School of Science,Xi'an University of Architecture and Technology,Xi'an 710055,China;School of Environmental and Municipal Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China;School of Environmental Science and Engineering,Chang'an University,Xi'an 710054,China)

机构地区：[1]西安建筑科技大学理学院,西安710055 [2]西安建筑科技大学环境与市政工程学院,西安710055 [3]长安大学环境科学与工程学院,西安710054

出　　处：《分析化学》2018年第3期432-437,共6页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金(No.21205092);西安建筑科技大学人才基金(No.RC1306);西安建筑科技大学青年科技基金(No.QN1434);长安大学开放基金(No.310829161130)资助~~

摘　　要：以β-环糊精为保护剂,氯化亚钯为前驱体,采用分子自组装的方式合成钯水凝胶,利用X-射线衍射仪(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)对其形貌和结构进行了表征。通过滴涂法将其修饰到金电极表面,采用循环伏安法(CV)、差分脉冲伏安法(DPV)对修饰电极的电化学行为了表征。结果表明,此传感器对水合肼具有良好的电催化效果,可有效消除K^+、Na^+、Mg^(2+)、NH_4^+、Ni^(2+)、Mn^(2+)和Cl^-、NO_3^-、SO_4^(2-)、PO_4^(3-)、HCOO^-(草酸根)、C_6H_5O_7^(3-)(柠檬酸根)等物质的干扰。在优化的条件下,氧化峰电流与水合肼的浓度在25~950μmol/L范围内呈良好的线性关系,检出限为1.6μmol/L(S/N=3)。此传感器具有制作简单、灵敏度高和选择性好等优点,可应用于实际水样中水合肼的检测。Palladium hydrogel capped byβ-cyclodextrins(Pdβ-CD)was prepared by a facile method withβ-cyclodextrins and palladium(II)chloride,which were then modified onto the surface of gold electrode.The morphology and structure of the as-prepared palladium hydrogel were characterized by X-ray powder diffraction(XRD),scanning electron microscopy(SEM)and transmission electron microscopy(TEM),while the electrochemistry behaviors of gold electrode modified by Pd茁-CD were investigated by cyclic voltammetry(CV)and differential pulse voltammetry(DPV).The results indicated the sensor had high electrochemistry response to hydrazine hydrate in the presence of K+,Na+,Mg2+,NH+4,Ni+2,Mn2+,Cl-,NO-3,SO2-4,PO3-4,HCOO-,C6H5O-3.Under the optimized conditions,the oxidized peak current showed linear relationship with the concentration of hydrazine hydrate in the concentration range of 25-950μmol/L and the limit of detection(LOD)of 1.6μmol/L(S/N=3).Owing to the facile preparation,high sensitivity and selectivity,the sensor has potential applications in determination of hydrazine hydrate in real water samples1

关 键 词：钯 水凝胶 电化学 传感器 水合肼 

分 类 号：O657.1[理学—分析化学] X832[理学—化学]