Journal
ANALYTICA CHIMICA ACTA
Volume 1138, Issue -, Pages 158-167Publisher
ELSEVIER
DOI: 10.1016/j.aca.2020.09.064
Keywords
Metal-organic framework; Porous carbon; Heteroatoms doping; Naphthol isomers; Electrochemical sensing
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Funding
- National Natural Science Foundation of China [21804031]
- Natural Science Foundation of Hubei Province [2017CFB788]
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Heteroatom-doped carbon has emerged as one of the most important electrode materials for electro-chemical analysis. Thus, designing and synthesizing novel heteroatom-doped carbon material with superior electrochemical activity is highly desired. Herein, we report a simple and effective pyrolysis-activation strategy to synthesize nitrogen and phosphorus co-doped porous carbon (N, P-C) framework by using zeolitic imidazolate framework-67 (ZIF-67) as the precursor and phytic acid as the phosphorus source. It is found that the surface defect level, electrochemical active area and electrode reaction kinetics of N, P-C framework is greatly boosted compared with ZIF-67 derived N-doped porous carbon (N-C) framework. These features endow N, P-C framework with outstanding electrochemical activity for the oxidation of highly toxic environmental pollutants 1-naphthol and 2-naphthol. The oxidation peak currents of 1-naphthol and 2-naphthol increase linearly in the range from 25 nM to 2 mu M. Besides, the limits of detection are estimated to be about 8.0 nM and 7.2 nM (three signal-to-noise ratio) for 1-naphthol and 2-naphthol with sensitivity of 87.3 mu A mu M-1 cm(-2) and 84.6 mu A mu M-1 cm(-2), respectively. (C) 2020 Elsevier B.V. All rights reserved.
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