Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2021 Jun;106(6):1017-1023.
doi: 10.1007/s00128-021-03179-7. Epub 2021 Mar 20.

Electrochemical Sensor Based on Reduced Graphene Oxide/Double-Walled Carbon Nanotubes/Octahedral Fe3O4/Chitosan Composite for Glyphosate Detection

Cao Thi Thanh  1 , Nguyen Hai Binh  1 , Phan Nguyen Duc Duoc  2   3 , Vu Thi Thu  4 , Pham Van Trinh  1 , Nguyen Ngoc Anh  1 , Nguyen Van Tu  1 , Nguyen Viet Tuyen  5 , Nguyen Van Quynh  4 , Vu Cam Tu  4 , Bui Thi Phuong Thao  6 , Pham Duc Thang  2 , Hiroya Abe  7 , Nguyen Van Chuc  8   9
Affiliations

Electrochemical Sensor Based on Reduced Graphene Oxide/Double-Walled Carbon Nanotubes/Octahedral Fe3O4/Chitosan Composite for Glyphosate Detection

Cao Thi Thanh et al. Bull Environ Contam Toxicol. 2021 Jun.

Abstract

In this work, reduced graphene oxide/double-walled carbon nanotubes/octahedral-Fe3O4/chitosan composite material modified screen-printed gold electrodes (rGO/DWCNTs/Oct-Fe3O4/Cs/SPAuE) under inhibition of urease enzyme was developed for the determination of glyphosate (GLY). The electrochemical behaviors of GLY on these electrodes were evaluated by square wave voltammetry (SWV). With the electroactive surface area is 1.7 times higher than that of bare SPAuE, the rGO/DWCNTs/Oct-Fe3O4/Cs/SPAuE for detection of GLY shows a low detection limit (LOD) of ~ 0.08 ppb in a large concentration range of 0.1-1000 ppb. Moreover, it is also successfully applied to the determination of GLY in river water samples with recoveries and relative standard deviations (RSDs) from 98.7% to 106.9% and from 0.79% to 0.87%, respectively. The developed composite will probably provide an universal electrochemical sensing platform that is very promising for environmental monitoring.

Keywords: Chitosan; Double-walled carbon nanotube; Electrochemical sensor; Glyphosate; Octahedral Fe3O4; Reduced graphene oxide.

PubMed Disclaimer

References

    1. Abe H, Naka T, Sato K et al (2019) Shape-controlled syntheses of magnetite microparticles and their magnetorheology. Int J Mol Sci. https://doi.org/10.3390/ijms20153617 - DOI
    1. Ayad MM, Amer WA, Kotp MG et al (2017) Synthesis of silver-anchored polyaniline-chitosan magnetic nanocomposite: a smart system for catalysis. RSC Adv. https://doi.org/10.1039/c7ra02575k - DOI
    1. Bard AJ, Faulkner LR (2002) Electrochemical methods: fundamentals and applications, New York: Wiley, 2001, 2nd ed. Russ J Electrochem. https://doi.org/10.1023/A:1021637209564 - DOI
    1. Bera M, Chandravati GP, Maji PK (2017) Facile one-pot synthesis of graphene oxide by sonication assisted mechanochemical approach and its surface chemistry. J Nanosci Nanotechnol. https://doi.org/10.1166/jnn.2018.14306 - DOI
    1. Boikanyo D, Adekunle AS, Ebenso EE (2016) Electrochemical study of pyrene on glassy carbon electrode modified with metal-oxide nanoparticles and graphene oxide/multi-walled carbon nanotubes nanoplatform. J Nano Res 44:158–195 - DOI

LinkOut - more resources