用mn3o4 - cn修饰电极检测水中硒和镍金属离子

IF 2.3 Q3 ELECTROCHEMISTRY International journal of electrochemistry Pub Date : 2021-05-31 DOI:10.1155/2021/6650542
N. John, K. E. Abraham
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引用次数: 2

摘要

本研究报告了Mn3O4-Cn电极的设计及其在同时检测水中硒和镍中的应用。所设计的电极可作为一种方便的电化学装置,用于受影响地区Se(IV)和Ni(II)水平的现场测试。最佳响应为0.1 M磷酸盐缓冲盐水(PBS)和5 mM Fe(CN)6作为支撑电解质。扫描速率和循环重复次数对峰值形状和强度有很大影响。从我们的研究中可以看出,在5-250的范围内,峰值强度与Se(IV)和Ni(II)浓度成正比 µg/L(相关系数0.952和0.984)。检测限0.533 µg/L Se(IV)和0.718 µg/L的Ni(VI),响应时间为18 s代表5–250 分别获得µg/L的浓度。对不同水样的增强分析结果表明,所提出的方法适用于Se(IV)和Ni(II)的检测。FESEM图像证实了Mn3O4-Cn纳米复合材料在电极上的形成。
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Detection of Selenium and Nickel Metal Ion in Water Using Mn3O4-Cn-Modified Electrode
The present study reports the design of the Mn3O4-Cn electrode and its use for simultaneous detection of selenium and nickel in water. The designed electrode can be used as a convenient electrochemical device for on-site testing of Se (IV) and Ni (II) levels in affected regions. The best responses are obtained with 0.1 M phosphate buffer saline (PBS) and 5 mM Fe (CN)6 as supporting electrolyte. The scan rate and the number of cyclic repetitions have a great effect on peak shape and intensity. It is seen from our study that peak intensity is directly proportional to Se (IV) and Ni (II) concentrations in the range of 5 to 250 µg/L (correlation coefficients 0.952 and 0.984) when the optimized parameters are used. The detection limit of 0.533 µg/L Se (IV) and 0.718 µg/L for Ni (VI) with a response time of 18 s for 5–250 µg/L concentration is obtained, respectively. Enhanced analytical results for different water samples establish that the proposed method is appropriate for Se (IV) and Ni (II) detection. FESEM images confirm the Mn3O4-Cn nanocomposite formation on the electrode.
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发文量
2
审稿时长
7 weeks
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