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现代化工  2021, Vol. 41 Issue (6): 232-236    DOI: 10.16606/j.cnki.issn0253-4320.2021.06.048
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海绵多孔状CoFe2O4/Nafion复合修饰电极检测重金属离子
徐玉婷1, 储旭1, 曹晏1,2
1. 安徽大学化学化工学院, 安徽 合肥 230601;
2. 中国科学院广州能源研究所, 广东 广州 510640
Sponge porous CoFe2O4/Nafion modified electrode for detection of heavy metal ions
XU Yu-ting1, CHU Xu1, CAO Yan1,2
1. College of Chemistry & Chemical Engineering, Anhui University, Hefei 230601, China;
2. Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
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摘要 采用溶胶-凝胶法制备的多孔海绵状CoFe2O4尖晶石晶体,滴铸在玻璃碳电极(glassy carbon electrode,GCE)上作为修饰电极,继续滴加Nafion形成CoFe2O4/Nafion/GCE电极。在优化的条件下,修饰电极在0.02~0.10 μmol/L内对于Pb(Ⅱ)的检测灵敏度为68.50 μA/(μmol·L),检测下限(limit of detection,LOD)为7.3 nmol/L(通过3σ方法计算)。进一步的XPS表征说明了活性材料对于重金属的络合作用。评估了所制备电极的重复性、干扰性以及实际湖水检测,结果均表明其优异的性能以及潜在的实用性。因此,CoFe2O4尖晶石晶体是潜在的重金属检测新型传感材料。
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徐玉婷
储旭
曹晏
关键词:  Pb(Ⅱ)  方波溶出伏安法  重金属离子  Nafion  多孔海绵CoFe2O4晶体    
Abstract: Porous sponge-like CoFe2O4 spinel crystals are prepared by the sol-gel method,and casted by dropping on a glassy carbon electrode (GCE) to make a modified electrode,on which Nafion is dropped in succeed to form CoFe2O4/Nafion/GCE electrode.Results show that under the optimized conditions,the linear range of Pb(Ⅱ) by CoFe2O4/Nafion/GCE is 0.02-0.10 μmol,with a sensitivity of 68.50 μA/(μmol·L) and a detection limit of 7.3 nmol (calculated by the 3σ method).XPS characterization demonstrates the complexation of active materials in the electrode with heavy metals.Subsequently,the repeatability,interference and actual lake water detection of the prepared electrode are evaluated,and it is verified to have excellent performance and potential practicability.Therefore,CoFe2O4 spinel crystal is a potential new sensor material for heavy metal detection.
Key words:  Pb(Ⅱ)    square wave stripping voltammetry    heavy metal ion    Nafion    porous sponge CoFe2O4 crystal
收稿日期:  2020-07-31      修回日期:  2021-04-13          
ZTFLH:  O657.1  
基金资助: 国家自然科学基金资助项目(21676001)
通讯作者:  曹晏(1968-),男,博士,教授,研究方向为污水处理以及稀土,通讯联系人,caoyan@ms.giec.ac.cn。    E-mail:  caoyan@ms.giec.ac.cn
作者简介:  徐玉婷(1995-),女,硕士生
引用本文:    
徐玉婷, 储旭, 曹晏. 海绵多孔状CoFe2O4/Nafion复合修饰电极检测重金属离子[J]. 现代化工, 2021, 41(6): 232-236.
XU Yu-ting, CHU Xu, CAO Yan. Sponge porous CoFe2O4/Nafion modified electrode for detection of heavy metal ions. Modern Chemical Industry, 2021, 41(6): 232-236.
链接本文:  
https://www.xdhg.com.cn/CN/10.16606/j.cnki.issn0253-4320.2021.06.048  或          https://www.xdhg.com.cn/CN/Y2021/V41/I6/232
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