摘要
环境监测、食品工业、临床、制药等领域对过氧化氢(H_2O_2)的快速、准确检测有极大的需求,而电化学检测方法由于灵敏度高、响应快、检测限低等特点被认为是最理想的H_2O_2检测方法.本文利用电化学沉积的方法将Pd纳米颗粒沉积到四氧化三铁/石墨烯(Fe_3O_4/rGO)纳米复合材料修饰的玻碳电极表面,形成基于新型磁性纳米复合材料的H_2O_2无酶传感器;并采用循环伏安和计时安培电流等方法对修饰电极的电化学性能进行了表征.结果表明:制备的Pd/Fe_3O_4/r GO/GCE对H_2O_2的催化还原显示出较好的电催化活性,Pd纳米颗粒和Fe_3O_4/rGO在催化H_2O_2还原的过程中表现出了良好的协同作用.测定H_2O_2的线性范围为0.05~1 m M和1~2.6 m M两段,最低检测限达到3.918μM(S/N=3).并且该传感器具有较高的灵敏度和较好的重现性和抗干扰性,具有一定的实际应用价值.
There is a great demand for the fast and accurate sensing of hydrogen peroxide（ H2O2） in environmental monitoring,food industry,clinical,pharmaceutical and other fields. Due to the high sensitivity,fast response and low detection limit,electrochemical method is considered as an ideal analytical strategy. A nonenzymatic H2O2 biosensor was obtained by utilizing the electrodeposition of Pd nanoparticles on iron oxidereduced graphene oxide（ Fe3O4/r GO） nanocomposite modified glassy carbon electrode（ GCE）. The electrochemical characteristics of the resulting biosensor were characterized by cyclic voltammetry（ CV） and chronoamperometry methods. These results indicated that the prepared Pd/Fe3O4/r GO/GCE exhibited excellent electro-catalytical activity towards the reduction of H2O2 and the synergetic effect of Pd and Fe3O4/r GO nanocomposite on the reaction of H2O2. The linear range of Pd/Fe3O4/rGO is 0.05 ~ 1 m M and 1 ~ 2.6 m M,with a detection limit of 3.918 μM（ S/N = 3）. The biosensor also exhibited high sensitivity,high reproducibility and good anti-interferent ability,and thus has certain value on the practical applications.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2017年第6期56-60,共5页
Materials Science and Technology
基金
国家自然科学基金资助项目(61471233
21504051)
上海市教委曙光计划(14SG52)
上海第二工业大学校基金(EGD15XQD04)
上海第二工业大学重点学科(材料科学与工程
XXKZD1601)资助
上海高校青年教师培养资助计划(ZZZZEGD15012)
上海市功能性材料化学重点实验室2015年度开放课题(SKLFMC201502)
