Abstract
Herein, zinc tungstate coupled fluorinated titanium dioxide (ZnWO4/F–TiO2) composites were synthesized by microemulsion hydrothermal process with cetyltrimethylammonium bromide/n-hexanol/deionized water/cyclohexane as microemulsion, butyl titanate as titanium source and ammonium fluoride as fluorine source. Methyl orange was used as the target pollutant in sewage to explore the photodegradation performance and recycling performance of the as-prepared specimens. Effect of coupling ratios on the photocatalytic performance was studied. SEM, XRD, UV–Vis Abs, FTIR, BET, and XPS were used to characterize the samples, the performances of photocurrent (i–t) and electrochemical impedance spectroscopy (EIS) were also investigated and the modification mechanism was systematically studied. The results showed that the optimal loading amount of ZnWO4 was 1 wt %. Under the same conditions, after illumination for 30 min with metal halide, the degradation rates of methyl orange by single TiO2, F–TiO2, and 1% ZnWO4/F–TiO2 reached 54.5, 84, and 93.5% respectively. 1% ZnWO4/F–TiO2 showed an enhanced photocatalytic activity and excellent cycle stability due to the formation of heterostructures which significantly inhibited the recombination of photogenerated electrons and holes.
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Funding
This work was funded by the Sichuan Science and Technology Plan Project (2023YFG0247), and the Youth Project of Neijiang Normal University (2022QN24).
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Liu, M., Zhang, LY., Tang, JJ. et al. Zinc Tungstate Coupled Fluorinated Titanium Dioxide (ZnWO4/F–TiO2) Composites with Enhanced Photocatalytic Activity. Russ. J. Phys. Chem. 97, 3238–3248 (2023). https://doi.org/10.1134/S0036024424010163
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DOI: https://doi.org/10.1134/S0036024424010163