Citation: Ying-Ying MA, Yi-Fan LIU, Shan-Shan GUO, Lu-Lu YAO, Chen-Yang HUANGFU, Wei-Rong ZHAO. Performance and Mechanism of Cu, C Co-loaded ZnO Photocatalyst for Nitrogen Fixation[J]. Chinese Journal of Inorganic Chemistry, ;2022, 38(2): 274-284. doi: 10.11862/CJIC.2022.007 shu

Performance and Mechanism of Cu, C Co-loaded ZnO Photocatalyst for Nitrogen Fixation

College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China

Corresponding author: Wei-Rong ZHAO, wrzhao@vip.163.com
Received Date: 27 July 2021
Revised Date: 6 October 2021

Figures(9)

Herein, Cu, C co-loaded ZnO photocatalyst was synthesized to promote its photocatalytic nitrogen fixation properties and overcome its disadvantages of high photoelectron-hole recombination rate, poor response to visible light and photocorrosion. The results indicated that CuCZ-3% (the weight of Cu loaded was 3% of the weight of ZnO) photocatalyst achieved the highest nitrogen fixation rate (4.96 mmol·g_cat^-1·h^-1), which was 8.10 times higher than that of ZnO (0.612 mmol·g_cat^-1·h^-1) and 1.65 times higher than that of CZnO (C-loaded ZnO, 3.00 mmol·g_cat^-1·h^-1). To explore possible mechanism for the promoted nitrogen fixation efficiency of CuCZ photocatalyst, X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS), photoluminescence spectroscopy (PL), and electrochemical impedance spectroscopy (EIS) were applied. The results indicated that the interfacial charge transfer mechanism induced by the transition metal Cu and the electronic bridging function of C enhanced nitrogen fixation efficiency and inhibited photoelectron-hole recombination of ZnO photocatalyst. CuCZ-3% photocatalyst exhibited excellent stability with the nitrogen fixation rate ranged between 4.61 and 4.96 mmol·g_cat^-1·h^-1 in four cycles. The main reason is that the coating effect of C weakens the photocorrosion of CuCZ photocatalyst.
- photocatalytic nitrogen fixation,
- ZnO,
- Cu, C co-loading,
- effect,
- mechanism
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