Fe_3O_4纳米粒子在电位型H_2O_2传感器中的应用  

Application of Fe_3O_4 MNps in the Potentiometric H_2O_2 Sensor

作　　者：冯春梁[1] 李丽[1] 邹文祥[1] 杨迎麟[1] 毛晓旭[1] 

机构地区：[1]辽宁师范大学功能材料化学研究所,辽宁大连116029

出　　处：《平顶山学院学报》2010年第2期82-85,共4页Journal of Pingdingshan University

基　　金：国家自然科学基金(60572009);辽宁省科技攻关项目(2005220024);辽宁省科技基金资助项目(99102004);辽宁省教育厅高校重点实验室项目(2008S134)

摘　　要：将超顺磁性纳米Fe3O4滴涂在磁性石墨电极上,制备一种新型H2O2传感器,用邻苯二胺的醋酸盐缓冲溶液作为测试底液,采用电位法对H2O2进行检测.结果表明,所研制的传感器具有制备简单、灵敏度高、线性范围宽、响应时间短、稳定性好、寿命长等优点,对H2O2的检测下限为3.31×10-7mol.L-1,检测范围为3.53×10-6~2.15×10-2mol.L-1,工作曲线的相关系数r=0.995 7,葡萄糖、尿素、半胱氨酸等物质对该传感器没有干扰.A novel H2O2 sensor was developed by immobilizing Fe3O4 MNPs on magnetic graphite electrode.H2O2 was detected by potentiometric analysis in o-phenylenediamine（OPD） solutin which was prepared in NaAc-HAc buffer.The results indicated that the H2O2 sensor has some advantages such as easy fabrication,high sensitivity,wide linear range,short response time and good stability.The resulting biosensor had a detection limit of 3.31×10-7 mol·L-1 H2O2 and a linear range from 3.53×10-6 to 2.15×10-2 mol·L-1 H2O2 was observed.Besides,the tested interferents,such as ascorbic acid（AA）,uric acid（UA）,L-cysteine exerted neglectable influences on the determination of H2O2.

关 键 词：四氧化三铁 纳米粒子 磁性石墨电极 过氧化氢传感器 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]