铋/蜂窝状碳纳米纤维的制备及其对过氧化氢的电化学高灵敏检测  

Preparation of Bismuth/Honeycomb-like Carbon Nanofibers and Its Electrochemical Sensitive Detection of Hydrogen Peroxide

作　　者：王凤怡 郑保战[2] 杜娟[2] 杨晓凤[1] 侯雪[1] 贺光云 覃蜀迪 WANG Feng-yi;ZHENG Bao-zhan;DU Juan;YANG Xiao-feng;HOU Xue;HE Guang-yun;QIN Shu-di(Institute of Quality Standard and Testing Technology for Agro-products,Sichuan Academy of Agricultural Sciences,Chengdu 610066,China;College of Chemistry,Sichuan University,Chengdu 610064,China)

机构地区：[1]四川省农业科学院农业质量标准与检测技术研究所,四川成都610066 [2]四川大学化学学院,四川成都610064

出　　处：《分析测试学报》2024年第12期1937-1943,1951,共8页Journal of Instrumental Analysis

基　　金：四川省农业科学院人才培养项目资助(NKYRCZX2024026)。

摘　　要：利用静电纺丝技术制备具有连续大孔结构的蜂窝状碳纳米纤维(HCNFs),通过水热法将铋纳米颗粒(Bi NPs)修饰在HCNFs,构建无酶电化学传感器(Bi/HCNFs)用于过氧化氢(H_(2)O_(2))电化学检测。通过扫描电子显微镜(SEM)和透射电子显微镜(TEM)对材料形貌进行表征,采用循环伏安法(CV)研究Bi/HCNFs修饰材料对H_(2)O_(2)的电催化行为,并对缓冲溶液的pH值以及工作电位等进行优化。在最佳条件下,通过计时电流法(I~t)测定传感器对H_(2)O_(2)的电催化性能,其在0.1~100μmol·L^(-1)浓度范围内表现出优异的电化学性能,检出限低至42 nmol·L^(-1),灵敏度为1 099.6μA·L·mmol^(-1)·cm^(-2);实际水样中H_(2)O_(2)的回收率为97.2%~102%。该传感器对H_(2)O_(2)检测表现出优异的重现性、稳定性以及实用性,具有良好的应用前景。Honeycomb-like carbon nanofibers(HCNFs) with continuous macroporous structure have been successfully prepared through electrospun technology.After that,Bi NPs were uniformly loaded on HCNFs forming composite(Bi/HCNFs) prepared by hydrothermal process,constructing an enzyme-free electrochemical sensor(Bi/HCNFs) for the electrochemical detection of hydrogen peroxide(H_(2)O_(2)).The morphology of the materials was characterized by scanning electron microscopy(SEM) and transmission electron microscopy(TEM).Furthermore,cyclic voltammetry(CV) was used to investigate the electrocatalytic behavior of Bi/HCNFs modified materials on H_(2)O_(2),and pH of the buffer solution and working potential were optimized.The electrocatalytic performance of the sensor on H_(2)O_(2) was measured by chronoamperometry method(I-t) under the optimal conditions.In the concentration range of 0.1-100μmol·L^(-1),the sensor exhibited excellent electrochemical performance,the detection limit was as low as 42 nmol·L^(-1),and the sensitivity was 1 099.6μA·L·mmol^(-1)·cm^(-2).It also shows excellent reproducibility,stability and practicability in response to H_(2)O_(2),and the recoveries of practical water samples was 97.2%-102%,which has a good application prospect.

关 键 词：蜂窝状碳纳米纤维 铋纳米颗粒 电化学传感器 过氧化氢 

分 类 号：O657.1[理学—分析化学]