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Catalytic Degradation of Rhodamine B by ZIF-67@NaBiO3 Composite Activated Peroxymonosulfate
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    Abstract:

    In this study, we report the first cobalt metal-organic framework containing zeolitic imidazolate framework (ZIF-67) immobilized on sodium bismuthate dehydrate nanoparticles to activate peroxymonosulfate (PMS), which was named ZIF-67@NaBiO3. Characterization of X-Ray Diffraction, Scanning Electron Microscope and X-Ray Photo-electron Spectroscopy were applied to explore its morphology, structure and element valence, and it was found that ZIF-67 was successfully supported on NaBiO3. We chose Rhodamine B(RhB) as the target pollutant, and then we studied the effects of the catalyst dosage, pH, PMS concentration, temperature and other factors on the degradation of RhB in the ZIF-67@NaBiO3 activated persulfate system. When the temperature is 20 ℃, pH=7, the concentrations of RhB, PMS, ZIF-67@NaBiO3 are 80 mg/L、600 mg/L and 100 mg/L, respectively, the degradation rate of Rhodamine B was as high as 98% after 30 minutes. Furthermore, the degradation rate remained around 98% after 4 circulating. Quenching experiments showed that the main oxidants in the reaction process under neutral conditions are , ?OH. In addition, due to the introduction of NaBiO3, the reacted materials are extremely easy to separate and can be reused, which further expands the industrial application range of organometallic frame materials.

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  • Online: July 05,2023
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