Adsorption desulfurization performances of Zn/Co porous carbons derived from bimetal-organic frameworks

Bimetal porous carbon Zn/[email protected] materials derived from bimetal (Zn, Co)-organic frameworks (bi-MOFs) were prepared by a carbonization method in this work. These carbon materials were analyzed by some characterization technologies including X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), N2 adsorption–desorption, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), Raman spectra, Zeta potential and Boehm titration. The results demonstrated that an optimal carbonization temperature was 800 °C. The material prepared under such condition (denoted as Zn/[email protected]) had good porous structures, uniformly distributed metal active sites, high surface area (531.1 m2 g−1) and large pore volume (0.449 cm3 g−1). In addition, adsorption desulfurization performances of samples for dibenzothiophene (DBT) were systematically investigated and followed an order: Zn/[email protected] > [email protected] > Zn/[email protected] > Zn/[email protected] > Zn/[email protected] > [email protected] Pseudo second-order kinetic and Langmuir models presented best fitting results of DBT adsorbing on Zn/[email protected] The Zn/[email protected] exhibited the remarkable adsorption capacity of DBT (40.6 mg g−1) due to positive bimetallic synergistic effects.