井冈山大学学报自然科学版

文章摘要

潘雨欣,雷龙文,董彦杰.氧化石墨烯修饰玻碳电极循环伏安法检测污水中Hg²⁺[J].井冈山大学自然版,2022,43(4):15-20

氧化石墨烯修饰玻碳电极循环伏安法检测污水中Hg²⁺

Hg²⁺ DETERMINATION IN SEWAGE BY CYCLIC VOLTAMMETRY WITH GRAPHEME OXIDE MODIFIED GLASSY CARBON ELECTRODE

投稿时间：2021-11-10 修订日期：2022-02-17

DOI：10.3969/j.issn.1674-8085.2022.04.003

中文关键词: 氧化石墨烯修饰电极循环伏安法 Hg²⁺

英文关键词: graphene oxide modified electrode cyclic voltammetry Hg²⁺

基金项目:国家自然科学基金项目(21601002/B010303);安徽省高校自然科学重点项目(KJ2020A0511);省部共建煤炭高效利用与绿色化工国家重点实验室开放课题资助项目(2019-KF-31)

作者	单位
潘雨欣	安庆师范大学化学化工学院, 安徽, 安庆 246013
雷龙文	安庆师范大学化学化工学院, 安徽, 安庆 246013
董彦杰	安庆师范大学化学化工学院, 安徽, 安庆 246013

摘要点击次数: 782

全文下载次数: 893

中文摘要:

将氧化石墨烯修饰到玻碳电极上,并用扫描电镜对其在电极表面的结构形貌进行了表征。考察了该修饰电极对12种金属离子的选择性,对Hg²⁺的选择性最好,通过循环伏安法对该修饰电极与裸电极进行比较,修饰电极具有明显的化学响应。研究结果表明,对Hg²⁺测定的最佳实验条件为:0.10 mol/L 醋酸钠-醋酸缓冲液(pH 3.64) 2.5 mL,1.0 mol/L KNO₃ 6.5 mL。在1.0~10.0 μmol/L范围内,测定Hg²⁺的线性回归方程为:ΔI=2.7241C_Hg+9.0936(C_Hg的单位μmol/L),线性相关系数为0.9977,检测限(DL)为0.90 μmol/L。11次的相对标准偏差(RSD)为2.8%。回收率在99.4%~101.6%之间。我们用电感耦合等离子发射光谱仪(ICP)同时对样品进行了测定,两种方法测定结果相比较吻合性很高。

英文摘要:

Graphene oxide was modified on glassy carbon electrode, the structure and morphology of graphene oxide on the electrode surface was characterized by scanning electron microscopy. The selectivity of the modified electrode to 12 metal ions was investigated, with the best selectivity to Hg²⁺. Compared the modified electrode with the bare electrode by cyclic voltammetry, the modified electrode has an obvious chemical response. The research results show that the best experimental conditions for the determination of mercury ions were:2.5 mL sodium acetate-acetic acid buffer (0.10 mol/L, pH 3.64), 6.5 mL KNO₃ (1.0 mol/L). In the range of 1.0~10.0 μmol/L, the linear regression equation for measuring mercury ions is:ΔI=2.7241C_Hg+9.0936 (the unit of C_Hg is μmol/L), the linear correlation coefficient is 0.9977, and the detection limit (DL) is 0.90 μmol/L. The relative standard deviation (RSD) of 11 times was 2.8%. The recovery rate is between 99.4% and 101.6%. We have used the inductively coupled plasma emission spectrometer (ICP) to measure the samples at the same time, and the results of the two methods are quite consistent.

查看全文查看/发表评论下载PDF阅读器

关闭