纳米氧化亚铜修饰玻碳电极测定对硝基苯酚  

Determination of p-Nitrophenol Using a Glassy Carbon Electrode Modified with Nano-cuprous Oxide

作　　者：王晓岗 刘晓[1] 车颖利 许新华[1] 

机构地区：[1]同济大学化学系,上海200092

出　　处：《化学世界》2016年第5期293-296,301,共5页Chemical World

基　　金：国家自然科学基金青年基金项目(51208367);同济大学实验教改基金项目(1380104081)

摘　　要：采用恒电位沉积法制备了花状纳米氧化亚铜修饰玻碳电极,利用X射线衍射(XRD)、扫描电镜(SEM)对纳米氧化亚铜薄膜进行表征,探讨了花状氧化亚铜的形成机理,研究了修饰电极的电化学性能。在pH值为5.5,0.1mol/L HAc-NaAc溶液中,该修饰电极对对硝基苯酚(P-NP)的氧化还原表现出良好的电催化效果,通过测定P-NP的硝基还原峰电流,结合微分脉冲技术,建立了P-NP电化学快速检测方法。线性范围为6.6×10^(-7)~1.6×10^(-4) mol/L,检测限为2.1×10^(-7)mol/L,对模拟水样进行测定,回收率为98.8%~102.2%。A flower-like cuprous oxide modified electrode [Cu20/GC （glassy carbon）] was prepared by the potentiostatic deposition of cuprous oxide on the surface of glassy carbon electrode. The nano-cuprous oxide thin film was characterized by X-ray diffraction （XRD） and field emission scanning electron microscopy （SEM）, and the formation mechanism of this film as well as the electrochemical properties of the modified electrode was investigated. In pH 5.5 and 0.1 mol/L HAc-NaAc solution, the Cu20/GC modified elec- trode exhibited an excellent electro-catalytic effect for the redox of p-nitrophenol （P-NP）. By using the dif- ferential pulse voltammetry （DPV） technology and measuring the reduction peak current of nitryl of P-NP, a fast and convenient assay method was established for the detection of P-NP. The linear range was 6.6 × 10-7-1.6×10 4 mol/L and the detection limit was estimated to be 2.1--10 7 mol/L. This method was a- dopted to determine P-NP in simulated water samples and the recovery was 98.8%--102.2%.

关 键 词：纳米氧化亚铜 修饰电极 对硝基苯酚 检测 

分 类 号：G642.0[文化科学—高等教育学]