Polyaniline/carbon nanotube-graphite modified electrode sensor for detection of bisphenol A
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Endocrine disruptors bisphenol A (BPA) have dreadful impacts on both humans and animals. A highly sensitive polyaniline-MWCNT-graphite (PANI-MWCNT-Gr)-base electrode sensor has been developed for the detection of BPA in water. The nanocomposite electrode was fabricated using a facile sol-gel chemical route by the reaction of graphite electrode (Gr) and polyaniline/multiwall carbon nanotube (PANI/MWCNT). Synergistic electrochemical interaction between MWCNT and PANI boosts electron transfer, resulting improvement in the generated current as compared to bare graphite and other reported electrodes. Consequently, a PANI/MWCNT-Gr-supported electrode sensor shows the unique potential of detecting BPA in a sub-nano range. Prepared nanocomposite electrode has been effectively employed for the detection of BPA in real samples (such as baby feed bottles), with more than 95% accuracy, which could potentially replace conventional detection systems. Advance experiments related to the stability of PANI/MWCNT-Gr-supported nanocomposite electrodes are in progress for replacing carbon electrodes in microbial fuel cells.
KeywordsElectrochemical sensor Characterization BPA detection CNT Polyaniline
The authors express their gratitude to the Department of Textile Technology, and to Mr. Nimay Bhandari (Phd Scholar, Department of Chemical Engineering), Dr. Anil Verma (Department of Chemical Engineering), and Professor S. Basu (Department of Chemical Engineering) for providing the CV facility.
This study is supported by the Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology, Delhi, New Delhi-110016, India; SERB-DST (SB/FT/CS-122/2014) for the grant of a Postdoctoral Fellowship to Mohammad Shahadat and Mr. Karan Singh.
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