Hydrothermally constructed AgWO4-rGO nanocomposites as an electrode enhancer for ultrasensitive electrochemical detection of hazardous herbicide crisquat

Selvarasu Maheshwaran; Vengudusamy Renganathan; Shen-Ming Chen; Ramachandran Balaji; C R Kao; Narendhar Chandrasekar; Selvarajan Ethiraj; Melvin S Samuel; Muthusamy Govarthanan

doi:10.1016/j.chemosphere.2022.134434

Hydrothermally constructed AgWO₄-rGO nanocomposites as an electrode enhancer for ultrasensitive electrochemical detection of hazardous herbicide crisquat

Chemosphere. 2022 Jul:299:134434. doi: 10.1016/j.chemosphere.2022.134434. Epub 2022 Mar 26.

Authors

Selvarasu Maheshwaran¹, Vengudusamy Renganathan², Shen-Ming Chen³, Ramachandran Balaji¹, C R Kao⁴, Narendhar Chandrasekar⁵, Selvarajan Ethiraj⁶, Melvin S Samuel⁷, Muthusamy Govarthanan⁸

Affiliations

¹ Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No.1, Section 3, Chung-Hsiao East Road, Taipei, 106, Taiwan.
² Department of Materials Science and Engineering, National Taiwan University, Taipei, Taiwan.
³ Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No.1, Section 3, Chung-Hsiao East Road, Taipei, 106, Taiwan. Electronic address: smchen78@ms15.hinet.net.
⁴ Department of Materials Science and Engineering, National Taiwan University, Taipei, Taiwan. Electronic address: crkao@ntu.edu.tw.
⁵ Department of Nanoscience and Technology, Sri Ramakrishna Engineering College, Coimbatore, Tamil Nadu, India.
⁶ Department of Genetic Engineering, School of Bioengineering, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, India.
⁷ Department of Material Science and Engineering, University of Wisconsin-Milwaukee, Milwaukee, WI, USA.
⁸ Department of Environmental Engineering, Kyungpook National University, Daegu, South Korea; Department of Biomaterials, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences, Chennai, 600 077, India.

PMID: 35351476
DOI: 10.1016/j.chemosphere.2022.134434

Abstract

The advancements in electrode materials with high efficiency has been prioritized to effectively monitor the presence of harmful pesticides concerning the environment. In such a way, we hydrothermally constructed a hybrid AgWO₄-rGO nanocomposites for the rapid electrochemical detection of crisquat (CQT). The structural, compositional, morphological and topographical characterization for AgWO₄-rGO nanocomposites is thoroughly performed to understand its electrocatalytic properties. The AgWO₄-rGO nanocomposites are used as an electrode enhancer (rGO@AgWO₄/GCE) for the electrochemical investigations towards CQT detection. The results indicated that the rGO@AgWO₄/GCE possessed an excellent catalytic activity with a wide linear detection range 1-1108 μM coupled with an ultrasensitive limit of detection (LOD) 0.0661 μM for electrochemical CQT detection. The rGO@AgWO₄/GCE CQT sensor also expressed remarkable sensitivity of 0.6306 μAμM^-1cm^-2 in addition to good selectivity and reproducibility. Furthermore, the commercial CQT, river water, tap water and washed vegetable water are used as a representative for real world analysis using rGO@AgWO₄/GCE and results are highly appreciable for the real time CQT detection. Our work proposes a novel hybrid rGO@AgWO₄ nanocomposites reinforced electrodes for ultra-trace level CQT detection with good reliability and can be advocated for real time detection of pesticides.

Keywords: Differential pulse voltammetry; Electrochemical detection; Pesticides; Water treatment; rGO based nanocomposite.

MeSH terms

Electrochemical Techniques / methods
Electrodes
Graphite* / chemistry
Herbicides*
Nanocomposites* / chemistry
Reproducibility of Results
Water

Substances

Herbicides
graphene oxide
Water
Graphite