单层二硫化钨-羧基化多壁碳纳米管修饰玻碳电极测定水中对硝基苯胺  

Determination of p-Nitroaniline in Water by Single-Layer Tungsten Disulfide-Carboxylated Multi-Walled Carbon Nanotubes Modified Glassy Carbon Electrode

作　　者：彭苏娟 陈海川 梅勇 顾缨缨 宋世震 潘洪志[2] PENG Sujuan;CHEN Haichuan;MEI Yong;GU Yingying;SONG Shizhen;PAN Hongzhi(Key Laboratory of Occupational Hazards Identification and Control in Hubei Province,School of Public Healthy Medical College,Wuhan University of Science and,Technology,Wuhan 430065»China;Shanghai University of Medicine and Health Sciences Shanghai 201318,China)

机构地区：[1]武汉科技大学医学院公共卫生学院职业危害识别与控制湖北省重点实验室,武汉430065 [2]上海健康医学院,上海201318

出　　处：《理化检验（化学分册）》2021年第4期303-308,共6页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：国家自然科学基金(819 73097);职业危害识别与控制湖北省重点实验室开放基金项目(OHIC2018G04)。

摘　　要：制备单层二硫化钨(WS2)与羧基化多壁碳纳米管(CMWCNTs)复合材料,用以修饰玻碳电极(GCE),构建了 WS2/CMWCNTs/GCE电化学传感器测定水中对硝基苯胺(PNA)。采用循环伏安法(CV)对修饰电极进行表征,探讨了 PNA在修饰电极上的电化学行为,结果表明:WS2/CMWCNTs复合膜对PNA有显著的电催化作用,循环伏安曲线显示在pH 7.0的磷酸盐缓冲溶液中,PNA在-0.7 V处有明显的还原峰,在优化的试验条件下,PNA的浓度在500 μmol·L^(-1)以内与其峰电流呈线性关系,检出限(3s/k)为0.63 μmol·L^(-1)。应用构建的修饰电极对废水进行分析,加标回收率为92.8%~102%,测定值的相对标准偏差(n=6)均小于5.0%。Single-layer tungsten disulfide(WS2) and carboxylate multi-walled carbon nanotubes(CMWCNTs) composites were prepared to modify glassy carbon electrode(GCE).The WS2/CMWCNTs/GCE electrochemical sensor was constructed for the determination of p-nitroaniline(PNA) in water.The modified electrode was characterized by cyclic voltammetry(CV),and the electrochemical behavior of PNA on cyclic voltammetry was discussed.The results showed that the WS2/CMWCNTs composite membrane had significant clcetro-catalysis for PNA.Cyclic voltammetry curve showed that in the pH 7.0 phosphate buffer solution,significant reductiol peak of PNA was found at-0.7 V.After the conditions were optimized,linearity relationship between the concentration of PNA and its peak current value was ranged within 500 μmol·L^(-1),with detection limit(3 s/k) of 0.63 μmol·L^(-1).The modified electrode was used to determine the sample of wastewater,recovery with adding standard was kept in the range of 92.8%-102%,and RSDs(n=6) of the measured values were found less than 5.0%.

关 键 词：单层二硫化钨 羧基化多壁碳纳米管 对硝基苯胺 循环伏安法 

分 类 号：O657.1[理学—分析化学]