Two-dimensional mesoporous ZnCo2O4 nanosheets as a novel electrocatalyst for detection of o-nitrophenol and p-nitrophenol

Publication date: 30 July 2018
Source:Biosensors and Bioelectronics, Volume 112
Author(s): Jiangjiang Zhang, Shiqiang Cui, Jing-Tai Zhao, Xinxin Yang, Yaping Ding, Kai Guo
Novel mesoporous ZnCo2O4 (meso-ZnCo2O4) nanosheets were synthesized by a simple hydrothermal method for detection of o-nitrophenol (ONP) and p-nitrophenol (PNP). The resultant meso-ZnCo2O4 nanosheets possess more catalytic active sites than other structures, which enhance the catalysis properties for the electrochemical detection of nitrophenol. This sensor exhibits a wide linear detection range (1–4000 and 1–4000 μM) and high sensitivity (0.256 and 0.318 μA μM⁻¹ cm⁻²), as well as low detection limit (0.3 and 0.3 μM), for ONP and PNP, respectively. In addition, the fabricated sensor reveals excellent reproducibility, stability and selectivity.



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