黄铜矿/纳米铜熔融盐修饰的电化学传感器对二羟基苯异构体的检测性能

Detection of dihydroxybenzene isomers using electrochemical sensor by chalcopyrite/copper nanoparticles molten salt modification

二羟基苯异构体,如对苯二酚(HQ)和邻苯二酚(CC),具有高毒性且难降解,对环境造成很大污染。本文以黄铜矿和纳米铜为基底原料,通过熔融盐法制备黄铁矿/纳米铜复合材料,并制备电化学传感器,用于同时检测邻苯二酚及对苯二酚。通过对形貌表征及性能测试,优化黄铁矿和纳米铜掺杂比例、制备温度、电解质溶液pH值等参数,制备出性能优良的电化学传感器。利用定电位方法确定邻苯二酚和对苯二酚检测的线性范围分别为10~800μmol/L和3~800μmol/L,检测限分别为0.5μmol/L和1.0μmol/L。所制备的黄铜矿/纳米铜电化学传感器响应速度快,使用寿命较长。既为酚类物质电化学传感器提供性能优良的基础材料,又为黄铜矿的高附加值应用提供新的研究领域。

Dihydroxybenzene isomers,such as hydroquinone(HQ)and catechol(CC),cause significant environmental pollution because they are highly toxic and difficult to degradable.In this work,chalcopyrite(CP)and copper nanoparticles(Cu)were used as substrate materials to prepare CP/Cu composite via a molten salt method.The CP/Cu composite based electrochemical sensor can determinate HQ and CC simultaneously.Through the evaluation of the surface morphology and performance,the electrochemical sensor with an excellent performance was prepared by optimizing the mass ratio of CP and Cu,heating temperature,and electrolyte pH.The linear range and detection limit of CC and HQ was 10~800μmol/L,3~800μmol/L and 0.5μmol/L,1.0μmol/L respectively using the constant potential method.In addition,the prepared CP/Cu composite based sensor possesses good characteristics of fast response and long lifetime.This study provides both base materials with excellent performance for phenolic electrochemical sensor,and a new research area for high value-added applications of chalcopyrite.