Abstract
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 × 10−9–1.18 × 10−6 mol L−1 with the detection limit of 1 × 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.
Highlights
IntroductionGlyphosate (common commercial name: “Roundup”), a widely used organophosphorus herbicide, has the advantages of low cost, high efficiency and broad-spectrum [1]
Glyphosate, a widely used organophosphorus herbicide, has the advantages of low cost, high efficiency and broad-spectrum [1]
Because specific donor groups in glyphosate have a strong affinity for copper (II), the adsorbed glyphosate would chelate with copper to form two stable five-membered rings [45]
Summary
Glyphosate (common commercial name: “Roundup”), a widely used organophosphorus herbicide, has the advantages of low cost, high efficiency and broad-spectrum [1]. The open structure and high biocompatibility of LDHs prompt their extensive use as effective redox mediators or stable matrixes in diverse electrochemical sensors, including the NiMn-LDH/graphene oxide for monitoring sugars and peroxides, the NiAl-LDH-based sensor for detecting ozone, and the Co2 Al-LDH/graphene-based on a biosensor to measure trichloroacetic acid [30,31,32]. In these cases, the LDHs exhibit extraordinary catalytic properties and a well-defined redox peak. We used the sensor in real water samples and obtained the satisfactory recovery rates
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
