首页|Investigation of Photocatalytic Properties of ZIF-67, GO/ZIF-67, and Ni/ZIF-67 for Crystal Violet Dye Removal
Investigation of Photocatalytic Properties of ZIF-67, GO/ZIF-67, and Ni/ZIF-67 for Crystal Violet Dye Removal
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This study investigates the photocatalytic degradation of Crystal Violet (CV) dye using Zeolitic Imidazolate Framework-67 (ZIF-67) and its composites, Graphene Oxide/ZIF-67 (GO/ZIF-67) and Nickel/ZIF-67 (Ni/ZIF-67). The materials were characterized by X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Brunauer-Emmett-Teller (BET) analysis, and Ultraviolet-Visible (UV-Vis) spectroscopy, confirming their crystalline structure, morphology, and optical properties. GO/ZIF-67 exhibited exceptional photocatalytic activity, achieving 96.91% degradation of 5 mg/L CV in 36 min under visible light at pH 4 with 0.25 g/L catalyst, following a pseudo-first-order rate constant of 0.94 min~(-1), compared to 0.91 min~(-1) for ZIF-67 and 0.64 min~(-1) for Ni/ ZIF-67. This enhanced performance is linked to its reduced bandgap energy of 1.7 eV (vs. 1.93 eV for ZIF-67 and 1.81 eV for Ni/ZIF-67). Parametric studies identified optimal conditions at 2.5-20 mg/L dye concentration and 0.25 g/L catalyst dosage. Reusability tests with GO/ZIF-67 showed 90% efficiency in the first cycle, declining to 23% after four cycles. These findings highlight GO/ZIF-67's potential as an effective photocatalyst for water remediation.
Department of Chemistry, Faculty of Science, Shahid Bahonar University of Kerman, Kerman, Iran
Lab. Expert of Mining Engineering Department, Shahid Bahonar University of Kerman, Kerman, Iran||Research and Technology Institute of Plant Production(RTIPP), Afzalipour Research Institute (ARI), Shahid Bahonar University of Kerman, Kerman, Iran
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