Abstract
In order to improve the electrochemical behavior of graphitic carbon nitride (g-C3N4), ZnO nanoparticles were coupled with g-C3N4 nanosheets to form functional nanocomposite through hydrothermal method. The morphologies of nanocomposite were characterized by TEM and XRD. The results revealed that the addition of g-C3N4 can efficiently inhibit the growth of ZnO along the c-axis to obtain smaller size ZnO nanoparticles, which could bring the enhanced electrochemical response. Hydrogen peroxide was selected as a model to investigate the electrochemical behavior of nanocomposite in neutral condition. Compared with pure ZnO and g-C3N4 modified electrodes, the oxidation of H2O2 could be greatly enhanced at the ZnO/g-C3N4 modified electrode, revealing that the coupling of g-C3N4 with metal oxide could significantly improve its conductivity and electrochemical response. As a result, H2O2 could be sensitively detected at the modified electrode in the range of 5 μM to 0.2 mM. The proposed method could be successfully used in the detection of H2O2 in tap water samples with satisfactory results.
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This work is financially supported by National Natural Science Foundation of China (nos. 21575002, 61671019). Natural Science Foundation from the Bureau of Education of Anhui Province (no. KJ2019A0073).
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Hui Liu, Zhang, Y., Dong, Y.P. et al. Synthesis of ZnO/g-C3N4 Nanocomposite and Its Electrochemical Application in Hydrogen Peroxide Detection. Russ J Electrochem 57, 808–815 (2021). https://doi.org/10.1134/S1023193520120125
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DOI: https://doi.org/10.1134/S1023193520120125