期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 8, 期 40, 页码 15108-15119出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.0c03710
关键词
electrochemical sensor; square wave voltammetry; bisphenol A; 4-nitrophenol; phenol; polyaniline; magnetite
资金
- Canada Research Chair Tier-2 award [950-231116]
- Ontario Ministry of Research and Innovation [35272]
- Natural Sciences and Engineering Research Council of Canada (NSERC) [3655]
- Canada Foundation for Innovation [35272]
- TD Graduate Research Scholarship in Environmental Science and Ontario Graduate Scholarship (OGS)
In this report, the ultrasensitive simultaneous determination of bisphenol A (BPA), phenol, and 4-nitrophenol (4-NP) as hazardous phenolic endocrine-disrupting agents was explored by square wave voltammetry (SWV) using magnetic needlelike Fe3O4 nanorods (MNRs) and a poly(3,4-methylenedioxy)aniline (PMDAN) nanocomposite-modified graphite paste electrode (GPE). The MNRs had dimensions of 5.3 +/- 1.1 nm in width and 61.4 +/- 3.3 nm in length. A solid-state, green, and sustainable method incorporating mechanochemical reactions between 3,4-(methylenedioxy)aniline as a novel aniline monomer and Fe(III) chloride was used for the synthesis of MNR-PMDAN. The MNR-PMDAN nanocomposite-modified GPE (MNR-PMDAN/GPE) exhibited three well-defined anodic peaks at 0.82, 0.96, and 1.20 V vs Ag/AgCl for BPA, phenol, and 4-NP, respectively, in an acidic electrolyte solution at pH 2.0. The calibration curves were linear up to 40.0, 150.0, and 125.0 mu M with a limit of detection of 4.3, 15.3, and 16.8 nM for BPA, phenol, and 4-NP, respectively. MNR-PMDAN/GPE was also used for the determination of BPA, phenol, and 4-NP in real samples with recoveries in the range of 95.2-104.9%. The results of this study demonstrate that the MNR-PMDAN nanocomposite is suitable for applications toward the development of a handheld device for on-field prescreening of hazardous endocrine-disrupting pollutants.
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