CuFe_2O_4纳米粒子-石墨烯修饰电极测定对硝基苯酚  

Determination of p-nitrophenol by electrode modified with CuFe_2O_4 nanoparticles and graphene

作　　者：李鑫[1] 王学亮[1] 

机构地区：[1]菏泽学院化学化工系,菏泽274015

出　　处：《分析试验室》2016年第3期301-304,共4页Chinese Journal of Analysis Laboratory

基　　金：山东省自然科学基金(BS2013HZ027);中国博士后科学基金(2015M572040)项目资助

摘　　要：在玻碳电极表面修饰一层纳米CuFe_2O_4-石墨烯复合膜,研究了对硝基苯酚在复合膜上的电化学行为。该复合膜对对硝基苯酚具有明显的电催化作用,测得一对不可逆氧化还原峰电位分别为0.063 V和-0.020 V。考察了支持电解质种类、酸度、修饰层厚度和扫描速度等对对硝基苯酚伏安响应的影响。在优化实验条件下,氧化峰电流与还原峰电流在浓度为3.0×10^(-5)~1.0×10^(-4)mol/L的范围内呈现良好的线性关系,检出限为8.0×10^(-7)mol/L。方法应用于模拟水样中对硝基苯酚的测定,回收率为99.2%~101.1%。A layer of CuFe_2O_4 nanoparticles and graphene was modified on the surface of a glassy carbon electrode and the electrochemical behavior of p-nitrophenol on the composite membrane was studied. The study showed that the composite membrane had an obvious electrocatalysis for the p-nitrophenol,and a pair of irreversible redox peaks was measured. The potentials of oxidation peak and reduction peak were 0. 063 V and-0. 020 V respectively. The influence of the factors such as the type of electrolyte,acidity,thickness of the modified layer and the scanning speed were also discussed. Under the optimized conditions,oxidation reduction peak current of p-nitrophenol showed better linear relationship at the range of 3. 0 × 10^（-5）~ 1. 0 × 10^（-4）mol / L,and the detection limit was 8. 0 × 10^（-7）mol / L. The method was applied to the determination of p-nitrophenol from simulated water samples and the recovery was 99. 2% ~ 101.1%.

关 键 词：对硝基苯酚 循环伏安法 CuFe2O4纳米粒子 电化学测定 

分 类 号：X132[环境科学与工程—环境科学]