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  1. Ultra-deep photocatalytic oxidative desulfurization of model fuel using Ti-Uio-66(Zr) metal–organic framework
Ultra-deep photocatalytic oxidative desulfurization of model fuel using Ti-Uio-66(Zr) metal–organic framework
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Ultra-deep photocatalytic oxidative desulfurization of model fuel using Ti-Uio-66(Zr) metal–organic framework

Beshtar, M

Ultra-deep photocatalytic oxidative desulfurization of model fuel using Ti-Uio-66(Zr) metal–organic framework

Beshtar, M ; Sharif University of Technology | 2024

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  1. Type of Document: Article
  2. DOI: 10.1007/s10562-023-04506-9
  3. Publisher: 2024
  4. Abstract:
  5. Titanium modified UiO-66(Zr)-type metal–organic framework (MOF) nanophotocatalysts have been prepared via a modified one-step solvothermal methodology and evaluated in photocatalytic oxidative desulfurization. Extensive characterization by X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), ultraviolet–visible diffuse reflectance spectroscopy (UV–vis DRS), photoluminescence spectroscopy (PL), nitrogen adsorption–desorption, and thermogravimetric analysis (TGA), have revealed the role of Ti loading, on Ti speciation and the structure of the synthesized materials. The performance of nanophotocatalysts have been evaluated for photocatalytic oxidative desulfurization (PODS). PODS reaction parameters, including temperature, photocatalyst dosage, oxidant to sulfur ratio, and solvent to fuel ratio, were optimized, with dibenzothiophene (DBT) conversion reaching 100% under optimal conditions (T = 50 °C, photocatalyst dosage = 2 g/L, oxidant to sulfur molar ratio (O/S = 8), and solvent/fuel = 1). Recyclability studies performed for the optimal catalyst showed good stability over six recycles, with total conversion dropping by only 18%. Kinetic studies showed that DBT PODS follows pseudo-first-order kinetics, with an activation energy value of 55.1 kJ mol−1. Graphical Abstract: (Figure presented.) © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2023
  6. Keywords:
  7. First-order reaction ; Photocatalysis ; UiO-66(Zr) ; Activation energy ; Desulfurization ; Energy dispersive spectroscopy ; Field emission microscopes ; Fourier transform infrared spectroscopy ; Fourier transforms ; Gas adsorption ; High resolution transmission electron microscopy ; Molar ratio ; Oxidants ; Photocatalytic activity ; Photoluminescence spectroscopy ; Sulfur ; Thermogravimetric analysis ; Titanium ; Dibenzothiophenes ; First order reactions ; Metalorganic frameworks (MOFs) ; Model fuels ; Oxidative desulfurization ; Photo-catalytic ; Photocatalytic degradation ; Titania ; Ultra deeps ; Scanning electron microscopy
  8. Source: Catalysis Letters ; Volume 154, Issue 6 , 2024 , Pages 2633-2647 ; 1011372X (ISSN)
  9. URL: https://link.springer.com/article/10.1007/s10562-023-04506-9