多孔阵列结构钴酸镍/泡沫镍复合电极材料制备及其在重金属离子检测中的应用  

Synthesis of Multi-pore Array Structure(NiCo_(2)O_(4)/NF)Composite Electrode Materials and Their Application in Heavy Metal Ion Detection

作　　者：张辉 欧康泰 任颖[3] 马骏 李晓 杜晓军[2] 孙友谊[2] ZHANG Hui;OU Kangtai;REN Ying;MA Jun;LI Xiao;DU Xiaojun;SUN Youyi(School of Electrical and Control Engineering,North University of China,Taiyuan 030051,China;Shanxi Province Key Laboratory of Functional Nanocomposites,North University of China,Taiyuan 030051,China;Department of Blood Transfusion,the First Hospital of Shanxi Medical University,Taiyuan 030001,China;Shanxi Natural Gas Co.,Ltd,Taiyuan 030000,China)

机构地区：[1]中北大学电气与控制工程学院,太原030051 [2]中北大学纳米功能复合材料山西省重点实验室,太原030051 [3]山西医科大学第一医院输血科,太原030001 [4]山西天然气有限公司,太原030000

出　　处：《太原理工大学学报》2023年第6期1048-1054,共7页Journal of Taiyuan University of Technology

基　　金：国家自然科学基金资助项目(U1810114);山西省自然科学基金资助项目(201803D421081);山西医科大学第一医院科学研究基金(YY2205)。

摘　　要：【目的】对电极材料和制备工艺进行深入研究,以开发应用于重金属离子检测的新型电化学传感器。【方法】通过水热法成功合成了多孔阵列结构钴酸镍/泡沫镍(NiCo_(2)O_(4)/NF)复合材料,并利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)及电化学测试等手段对样品组成、形貌及电化学性能进行表征。【结果】结果表明:NiCo_(2)O_(4)均匀覆盖在泡沫镍表面,呈现高度开放的纳米线状阵列结构。利用NiCo_(2)O_(4)/NF复合材料作为电极,对不同浓度Hg^(2+)溶液进行电化学检测,在0.125~2.5μmol/L和2.5~35μmol/L浓度范围内,灵敏度分别为0.025和0.0034μA/(μmol/L);同时表现出良好的稳定性和复现性。此外,还利用该复合电极对不同浓度混合重金属离子溶液进行检测,表现出较高的灵敏度和区分性。【结论】为设计和合成高性能电极材料提供了一种新的方法,可方便地对重金属离子进行电化学检测。【Purposes】In-depth research on electrode materials and preparation processes to develop new electrochemical sensors for heavy metal ion detection is of great importance.【Methods】The porous NiCo_(2)O_(4)array grown on Ni foam(NiCo_(2)O_(4)/NF)was synthesized by hydrothermal method.Then,the composition,morphology,and electrochemical properties of the sample were characterized by X-ray diffraction,scanning electron microscopy,and electrochemical tes-ting.【Findings】The results show that the NiCo_(2)O_(4)array is uniformly loaded on the skeleton of Ni foam with a highly open nanowire array structure.The NiCo_(2)O_(4)/NF composite material is di-rectly applied as the electrode for electrochemical determination of Hg^(2+)solutions with different concentrations.In 0.125~2.5μmol/L and 2.5~35μmol/L concentration range,the detection sensitivities are 0.025 and 0.0034μA/μmol/L,respectively.Meanwhile,the electrode shows good stability and reproducibility.In addition,when the composite electrode is also used to detect mixed heavy metal ion solutions of different concentrations,it also shows high sensitivity and dis-crimination.【Conclusions】The research results in this paper provid a new method for designing and synthesizing high-performance electrode materials,for conveniently detecting heavy metal ions by electrochemical method.

关 键 词：钴酸镍 泡沫镍 水热法 电化学检测 重金属离子 

分 类 号：O657.1[理学—分析化学]