Abstract
Although metal–organic frameworks (MOFs) are a viable choice for photocatalysts with large surface area and tunable pore structure, the rapid recombination of excited photogenerated charges results in low activity towards photodegradation. Aiming at improving the photocatalytic activities of MOFs, different strategies to incorporate MOF with light-harvesting semiconductors have been developed. In this research, we report an effective photocatalyst designed by incorporating Cu-MOF with ZnO for the photocatalytic degradation of Rose Bengal exhibiting excellent degradation efficiency of 97.4% in 45 min under natural sunlight with catalyst dosage of 320 mg/L. The optical, morphology and surface characteristics of the prepared nanocomposite were studied using scanning electron microscopy (SEM–EDX), high-resolution transmission electron microscopy (HRTEM), powder X-ray diffraction (PXRD), Brunauer–Emmett–Teller (BET) analysis, thermogravimetric (TGA) analysis, Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and ultraviolet diffused reflectance spectroscopy (UV-DRS) techniques. Further studies showed that the degradation followed first-order kinetics with a rate constant of 0.077869 min−1. The degradation mechanism was investigated by photoluminescence (PL) study, XPS, zeta potential and quenching experiment in presence of different scavengers. Meanwhile, the fabricated composite displayed good recovery and reuse properties up to 5 cycles as revealed by XRD analysis proving itself a potential MOF-based photocatalyst towards environmental remediation process.
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The authors are thankful to the Director, National Institute of Technology Silchar, for his help and continuous support for the preparation of the manuscript.
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Saptarshi Roy, Jnyanashree Darabdhara and Mohammed Ahmaruzzaman have equally contributed in conducting the literature review and compilation of the manuscript.
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Roy, S., Darabdhara, J. & Ahmaruzzaman, M. ZnO-based Cu metal–organic framework (MOF) nanocomposite for boosting and tuning the photocatalytic degradation performance. Environ Sci Pollut Res 30, 95673–95691 (2023). https://doi.org/10.1007/s11356-023-29105-4
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DOI: https://doi.org/10.1007/s11356-023-29105-4