Articles written in Journal of Chemical Sciences

    • Mixed oxides derived from layered double hydroxides of Ni and Co as photocatalysts for desulfurization of dibenzothiophene


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      The synthesis of cobalt–nickel mixed oxides with different ratios of Ni/Co was carried out by coprecipitation method and used as a photocatalyst in the removal of dibenzothiophene (DBT) from a gasoline model under visible light. The structure of the synthesized samples was analyzed by the XRD, FTIR, BET and EDX spectrum. Also, the morphology of the mixed oxides was investigated with SEM images. It was found that the particle size is in the range of 15–30 nm, and the shape of the particles was almost spherical and distinctly separate. The mixed oxides exhibited promising photocatalytic activity to remove dibenzothiophene under visible light. The process was optimized by the one-factor at a time method. The effects of different factors such as the type of photocatalyst, dibenzothiophene concentration, temperature and time on the dibenzothiophene removal process were investigated and the optimal conditions resulted in the DBT concentration of 150 ppm catalyzed by 0.2 Co–Ni (1:1) photocatalyst at 50 °C for 3 h. The results indicated that DBT was degraded to SO2 gas and Biphenyl during the photocatalytic desulfurization.

      Mechanism of photo-desulfurization of di-benzothiophene over Ni-Co LDH/oxide.

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