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Synthesis and Characterization of a Composite of ZIF-8 and TiO2 NPs as a Photocatalyst Material for Water Treatment

Sedighi, Omid | 2021

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 53799 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Dolati, Abolghasem; Abachi, Parvin
  7. Abstract:
  8. During the past few years, hexavalent chromium (Cr(VI)) is of environmental concern due to its high toxicity and mobility. Therefore, removing it from industrial wastewater is of chief significance. In this research, efficient photocatalyst materials (xµLTiO2NPs@ZIF-8) for the reduction of Cr(VI) from water resources were firstly synthesized. This composite was prepared by an in situ method with zeolitic imidazolate framework-8 as the matrix. TiO2 and ZIF-8 were selected for their excellent stability in aqueous media, high photoactivity, non-toxicity, and high surface area. The structure of the as-synthesized materials was characterized by X-ray powder diffraction (XRD), scanning electron microscopy, Fourier transform infrared spectroscopy (FT-IR). The Uv-Vis results exhibited that the addition of TiO2 to ZIF-8’s structure can enhance its photocatalytic activity and 400µLTiO2@ZIF-8 composite was the most efficient composite in Cr(VI) removal. Chronoamperometry test was carried out to investigate the photo-generated carrier transport during photocatalytic activity. For this matter, a thin film of the composite was synthesized on the FTO glasses. This study proposes a promising approach toward increasing the photocatalytic properties of ZIF-8 with TiO 2 NPs for Cr(VI) removal
  9. Keywords:
  10. Zeolite Imidazolate Framework ; Hexavalent Chromium Removal ; Titanium Oxide ; Photocatalyst ; Industrial Wastewaters ; Photocatalytic Purification ; Electrochemical Method

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