铁氰化钴修饰石墨烯平面电极对过氧化氢的传感作用  

Cobalt Hexacyanoferrate-modified Graphene Platform Electrode and Its Electrochemical Sensing toward Hydrogen Peroxide

作　　者：赵鸿彩[1] 张璞[1] 李社红[1] 罗红霞[1] 

机构地区：[1]中国人民大学化学系,北京1000872

出　　处：《分析化学》2017年第6期830-836,共7页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金项目(No.21575160)资助~~

摘　　要：利用高分子支撑法将气相沉积(CVD)石墨烯从铜基底上转移到聚对苯二甲酸乙二醇酯(PET)基底上,制备出石墨烯平面电极(GPE),通过循环伏安法将铁氰化钴(Co HCF)纳米颗沉积到GPE上,得到铁氰化钴修饰石墨烯平面电极(Co HCF/GPE)。研究表明,此电极对过氧化氢具有良好的传感作用,从而构建一种新型无酶过氧化氢传感器。此传感器在过氧化氢浓度为5.0-1200μmol/L范围内,响应电流与浓度呈现良好的线性关系,检出限为7.1 nmol/L(S/N=3),响应时间约为2 s,具有稳定性好、抗干扰能力强、制备简单等优点。A large-area graphene platform electrode （GPE） was fabricated by transferring the chemical vapor deposition （ CVD） graphene grown on Cu foils to polyethylene terephthalate （ PET） substrates with the aid of polymethyl-methacrylate （ PMMA）. Then cobalt hexacyanoferrate （ CoHCF） was electrodeposited on the GPE by cyclic voltammetry to obtain a CoHCF/GPE. The morphology and electrochemical properties of this electrode were studied by scanning electron microscope （ SEM ） , electrochemical impedance spectroscopy （EIS） and the electrochemical measurements. Results showed that the electrode had favorable sensing effect toward H2O2. On the basis of this, a new nonenzyme H2O2 sensor was constructed. Under the optimal experimental conditions, the proposed sensor had a quick response to the addition of H2O2（about 2 s） with a wide linear rang （5 × 10^- 3-1.2 mmol/L） and a low detection limit （7.1 nmol/L）. This sensor was easy to fabricate and showed excellent stability and anti-interference ability.

关 键 词：气相沉积 石墨烯 铁氰化钴纳米颗粒 化学修饰平面电极 过氧化氢 

分 类 号：O657.1[理学—分析化学]