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Abstract <p>Co<sub>3</sub>O<sub>4</sub>/g-C<sub>3</sub>N<sub>4</sub> supported catalysts with different Co<sub>3</sub>O<sub>4</sub> contents were synthesized using the impregnation method followed by high-temperature calcination. The structure and properties of the supported catalysts were characterized through Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), N<sub>2</sub> adsorption-desorption (BET), and thermogravimetric analysis (TGA). In this experiment, Co<sub>3</sub>O<sub>4</sub>/g-C<sub>3</sub>N<sub>4</sub> was utilized as the catalyst, H<sub>2</sub>O<sub>2</sub> served as the oxidant, and a co-crystal solvent [(polyethyleneglycol-200) : (tetrabutylammonium chloride) = 2 : 1] was employed as the extractant for the oxidative desulfurization of model oil. The impact of different loadings, reaction temperatures, oxygen-sulfur ratios, catalyst dosages, and types of sulfides on the desulfurization rate were systematically investigated. The results demonstrate that under optimal conditions of <i>T</i> = 50°C, <i>m</i>(catalyst) = 0.03 g, and <i>n</i>(O)/<i>n</i>(S) = 10, the desulfurization rate of the 30%Co<sub>3</sub>O<sub>4</sub>/g-C<sub>3</sub>N<sub>4</sub> catalyst can reach 93.6±0.5% after a reaction time of 75 min. After five cycles of recycling, the catalytic activity of the catalyst exhibited no significant decrease.</p>

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Cobalt-Doped g-C3N4 as Efficient Catalyst for Oxidative Desulfurization of Fuel Oil

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • Q. Tong,
  • L. Xu,
  • B. Hu

摘要

Abstract

Co3O4/g-C3N4 supported catalysts with different Co3O4 contents were synthesized using the impregnation method followed by high-temperature calcination. The structure and properties of the supported catalysts were characterized through Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), N2 adsorption-desorption (BET), and thermogravimetric analysis (TGA). In this experiment, Co3O4/g-C3N4 was utilized as the catalyst, H2O2 served as the oxidant, and a co-crystal solvent [(polyethyleneglycol-200) : (tetrabutylammonium chloride) = 2 : 1] was employed as the extractant for the oxidative desulfurization of model oil. The impact of different loadings, reaction temperatures, oxygen-sulfur ratios, catalyst dosages, and types of sulfides on the desulfurization rate were systematically investigated. The results demonstrate that under optimal conditions of T = 50°C, m(catalyst) = 0.03 g, and n(O)/n(S) = 10, the desulfurization rate of the 30%Co3O4/g-C3N4 catalyst can reach 93.6±0.5% after a reaction time of 75 min. After five cycles of recycling, the catalytic activity of the catalyst exhibited no significant decrease.