Journal
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
Volume 191, Issue -, Pages -Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2020.110194
Keywords
Electrochemical detection; Environmental pollutant; 4-aminophenol; Differential pulse voltammetry
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Funding
- National Natural Science Foundation of China [21571191, 51674292]
- Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety [2018TP1003]
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A novel electrochemical sensor based on zinc oxide/nitrogen doped porous carbons (ZnO/NPC) modified electrode has been constructed for detecting 4-aminophenol (4-AP). The ZnO/NPC material was synthesized by one-step carbonization of MOF-5-NH2. The modified glassy carbon electrode (ZnO/NPC/GCE) holds excellent electrocatalytic activity toward 4-AP, with a sensitivity of about 31.02 mu A/mu M/cm(2). Under optimal conditions, its oxidation peak current increases linearly with the increasing concentration of 4-AP (from 5 to 120 mu mol/L), and the detection limits is 0.014 mu mol/L (S/N = 3). Furthermore, favorable selectivity, superior reproducibility and outstanding stability have been achieved. The ZnO/NPC/GCE has been applied in detecting 4-AP in industrial waste water and achieved positive results with the recovery of 4-AP ranging from 94.02% to 107.7%, which confirms that this sensor is a reliable platform for the detection of 4-AP in waste water.
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