Performance of CuAl-LDH/Gr Nanocomposite-Based Electrochemical Sensor with Regard to Trace Glyphosate Detection in Water
文献类型： 外文期刊
作者： Zhang, Chuxuan 1 ; Liang, Xinqiang 1 ; Lu, Yuanyuan 3 ; Li, Hua 4 ; Xu, Xiangyang 1 ;
作者机构： 1.Zhejiang Univ, Coll Environm & Resource Sci, Hangzhou 310058, Peoples R China
2.Key Lab Water Pollut Control & Environm Secur Tec, Hangzhou 310058, Peoples R China
3.Univ Oxford, Phys & Theoret Chem Lab, Oxford OX1 3QZ, England
4.Zhejiang Acad Agr Sci, Inst Environm Resource Soil & Fertilizer, Hangzhou 310021, Peoples R China
关键词： electrochemical detection; glyphosate; layer double hydroxides; sensor
期刊名称：SENSORS （ 影响因子：3.576； 五年影响因子：3.735 ）
ISSN：
年卷期： 2020 年 20 卷 15 期
页码：
收录情况： SCI
摘要： Glyphosate, which has been widely reported to be a toxic pollutant, is often present at trace amounts in the environment. In this study, a novel copper-aluminum metal hydroxide doped graphene nanoprobe (labeled as CuAl-LDH/Gr NC) was first developed to construct a non-enzymatic electrochemical sensor for detection trace glyphosate. The characterization results showed that the synthesized CuAl-LDH had a high-crystallinity flowered structure, abundant metallic bands and an intercalated functional group. After mixed with Gr, the nanocomposites provided a larger surface area and better conductivity. The as-prepared CuAl-LDH/Gr NC dramatically improved the enrichment capability for glyphosate to realize the stripping voltammetry detection. The logarithmic linear detection range of the sensor was found to be 2.96 x 10(-9)-1.18 x 10(-6)mol L(-1)with the detection limit of 1 x 10(-9)mol L(-1)with excellent repeatability, good stability and anti-interference ability. Further, the sensor achieved satisfactory recovery rates in spiked surface water, ranging from 97.64% to 108.08%, demonstrating great accuracy and practicality.
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