Abstract
A novel Ag3PO4/ZnO/diatomite composite photocatalyst was prepared by simple ultrasonic dispersion-precipitation method. The structure, composition, microstructure and optical properties of the catalysts were characterized by means of X-ray diffraction (XRD), fourier transform infrared (FT-IR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), transmission electron microscope (TEM) and UV-vis diffuse reflectance spectra (UV-vis DRS). Moreover, the visible light catalytic performance of the catalyst was investigated with tetracycline hydrochloride (TC) as the degradation target. The results showed that the photocatalytic activity of Ag3PO4/ZnO/diatomite in the degradation of TC, which can reach 90.99% removal rate of 30 mg/L TC under visible light, was significantly better than that of monomer catalysts and Ag3PO4/ZnO catalyst. Meanwhile, it exhibited better stability compared with pure Ag3PO4. The improvement of visible light catalytic activity and stability of Ag3PO4/ZnO/diatomite is mainly attributed to the catalyst’s better adsorption capacity, wider spectral response range, more efficient photo-generated electrons and holes migration and less photocorrosion. The results of free radical trapping experiments show that the main active species of the reaction system are h+ and •O2−.
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ACKNOWLEDGMENTS
We gratefully acknowledge the financial supports from the National Natural Science Foundation of China (no. 51974267) Sichuan science and technology support project (2020JDTD0018) and the Foundation of Youth Science and Technology Innovation Team of Sichuan Province (grant no. 2015TD0007).
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Zhu, P., Duan, M., Wang, R. et al. Fabrication of Highly Active Ag3PO4/ZnO/Diatomite for Visible Light Photocatalytic Degradation of Tetracycline Hydrochloride. Russ J Appl Chem 93, 1615–1627 (2020). https://doi.org/10.1134/S107042722010171
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DOI: https://doi.org/10.1134/S107042722010171