Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Volume 926, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2022.116939
Keywords
Molecularly imprinted polymer; 4-nitrophenol; Hydroquinone; 4-amino thiophenol; P -phenylene diamine; Electropolymerization; Sensor
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Funding
- IoE, BHU [6031]
- University Grants Commission (UGC), New Delhi, India [16-9(June 2018)2019(NET/CSIR)]
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An electropolymerized MIP sensor was developed for the simultaneous determination of 4-nitrophenol and hydroquinone, common pollutants in industrial wastewater. The sensor demonstrated high specificity and selectivity, with detection limits of 0.14 mu M and 0.37 mu M for the individual determination of HQ and 4-NP, and 0.9 mu M and 1.2 mu M for the simultaneous determinations.
The development of synthetic receptor for dual analytes is generally complicated by cross-reactivity, matrix effects and other experimental limitations. Electrochemical MIP sensors are one of the preferred methodologies which yields clean, facile, simple sensors with aided advantage of high selectivity and sensitivity both. Here an electropolymerized molecularly imprinted polymer (MIP) sensor for the simultaneous determination of 4-nitrophenol (4-NP) and hydroquinone (HQ), the most common pollutants discharged into water bodies from industrial wastewater effluents with high specificity and selectivity is presented. Copolymer of 4-amino thiophenol and p-phenylenediamine were imprinted with these dual templates, i.e., HQ and 4-NP via electropolymerization on a glassy carbon electrode. This MIP sensor was applied for the analysis of HQ and 4-NP in 'real' water samples. The detection limits obtained for the individual determination of HQ and 4-NP were 0.14 mu M and 0.37 mu M respectively, while for the simultaneous determinations were found to be 0.9 mu M and 1.2 mu M for HQ and 4-NP respectively. This dual imprinted sensor showed good repeatability and reusability.
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