Fabricating BiOI nanostructures armed catalytic strips for selective electrochemical and SERS detection of pesticide in polluted water

Ramachandran Balaji; Selvarasu Maheshwaran; Shen-Ming Chen; Elayappan Tamilalagan; Narendhar Chandrasekar; Selvarajan Ethiraj; Melvin S Samuel

doi:10.1016/j.envpol.2021.118754

Fabricating BiOI nanostructures armed catalytic strips for selective electrochemical and SERS detection of pesticide in polluted water

Environ Pollut. 2022 Mar 1:296:118754. doi: 10.1016/j.envpol.2021.118754. Epub 2021 Dec 29.

Authors

Ramachandran Balaji¹, Selvarasu Maheshwaran¹, Shen-Ming Chen², Elayappan Tamilalagan¹, Narendhar Chandrasekar³, Selvarajan Ethiraj⁴, Melvin S Samuel⁵

Affiliations

¹ Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei, 106, Taiwan, ROC.
² Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei, 106, Taiwan, ROC. Electronic address: smchen1957@gmail.com.
³ Department of Nanoscience and Technology, Sri Ramakrishna Engineering College, Coimbatore, Tamil Nadu, India.
⁴ Department of Genetic Engineering, School of Bioengineering, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, India.
⁵ Department of Material Science and Engineering, University of Wisconsin-Milwaukee, Milwaukee, WI, USA.

PMID: 34973381
DOI: 10.1016/j.envpol.2021.118754

Abstract

We have constructed a dual mode catalytic strip equipped with 2D BiOI nanostructures and deployed for dual mode detection sensing of hazardous trichlorophenol (TCP). Synthesized BiOI nanostructures are investigated for its crystal architecture, morphology and chemical composition. The BiOI are loaded onto the catalytic strips with the assistance of gravity offered drying process. The BiOI nanostructures offers a very less charge transfer resistance indicating its superior catalytic properties upon the electrochemical impedance studies. It reflected on providing an excellent limit of detection (LOD) and linear sensing range for TCP in electrochemical mode. For SERS, a thin plasmonic Au layer is sputter coated on BiOI equipped catalytic strips (Au@BiOI) for the TCP detection. An impressive enhancement factor of 10⁷ is obtained for SERS detection of TCP with good LOD of 10^-10 M. Fabricated dual mode BiOI based strips are thoroughly examined for operational stability and performance in real time conditions. The fabricated high performance dual mode platform for the detection of hazardous pesticides appears to be a promising prospect for the on-the-spot investigation.

Keywords: BiOI; Catalytic strips; Electrochemical sensing; Mixed contaminants; SERS.

MeSH terms

Catalysis
Limit of Detection
Nanostructures*
Pesticides*
Water

Substances

Pesticides
Water