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The efficient removal towards tetracycline via photocatalytic persulfate activation using the heterostructured UiO-66-NH2-CA-Cu/g-C3N4 composite

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Abstract

A series of UiO-66-NH2-CA-Cu/g-C3N4 (UCC1/CNx) heterogeneous photocatalysts were constructed via a facile physical mixing treatment of the covalently post-modified MOF (UiO-66-NH2-CA-Cu) and functional materials g-C3N4. The tetracycline removal by the photocatalysis coupled with persulfate activation were studied under white light irradiation. The optimal UCC1/CN20 photocatalyst showed the best photocatalytic performance, in which 94.0% TC could be efficiently eliminated (k = 0.08669 min−1) within 30 min. The satisfactory degradation performance could be ascribed to the effective separation of photogenerated electron-hole pairs over the heterogeneous binary structure, which were demonstrated by several characteristic technologies including photoluminescence spectra, electrochemical impedance spectroscopy, transient photocurrent response and Bader charge analysis based on density functional theory calculations. Moreover, a possible mechanism behind the photocatalytic degradation was proposed and further affirmed by the quenching experiments and electron spin resonance measurements. Our work may supply a feasible idea for treating wastewater contained organic pollutants based on the heterogeneous photocatalyst.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (22162023 and 21761031), National Natural Science Foundation of Gansu province (No.20JR5RA523), Industrial Support Plan Project of Colleges in Gansu Province (2021CYZC-17), the Key Science and Technology Foundation of Gansu Province (20YF3GA021), the Innovation Funding Program of Universities of Gansu province (2020B-091), the Promotion Project of Young-Teacher Research capacity of Northwest Normal University (NWNU-LKQN-18-5) and the Natural Science Young Scholars Research Fund Project of Qinghai Normal University (2020QZR019).

Funding

This study was funded by the National Natural Science Foundation of China (22162023 and 21761031), National Natural Science Foundation of Gansu province (No. 20JR5RA523), Industrial Support Plan Project of Colleges in Gansu Province (2021CYZC-17), the Key Science and Technology Foundation of Gansu Province (20YF3GA021), the Innovation Funding Program of Universities of Gansu province (2020B-091), and the Promotion Project of Young-Teacher Research capacity of Northwest Normal University (NWNU-LKQN-18-5).

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  1. College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, Gansu, China

    Yan Fan, Lei Wang, Xueqin Sun, Cuili Li & Jiacheng Liu

  2. College of Chemistry and Chemical Engineering, Qinghai Normal University, Xining, 810000, Qinghai, China

    Yan Fan

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YF: methodology, investigation, writing—original draft. LW: supervision, writing—original draft, investigation. XS: methodology, investigation. CL: investigation. JL: supervision, conceptualization, project administration, writing—review and editing.

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Correspondence to Lei Wang or Jiacheng Liu.

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Fan, Y., Wang, L., Sun, X. et al. The efficient removal towards tetracycline via photocatalytic persulfate activation using the heterostructured UiO-66-NH2-CA-Cu/g-C3N4 composite. J Mater Sci: Mater Electron 34, 1739 (2023). https://doi.org/10.1007/s10854-023-11142-x

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