Abstract:Utilizing novel m-carborane and 3-Ethynylbenzenamine resin as precursor, ordered mesoporous carbon (BNC) doped with boron (up to 4.95 wt%) and nitrogen (up to 6.32 wt%) were successfully prepared by hard-template route. The obtained material possessed high specific surface area, large pore volume and narrow pore size distribution. The effects of different precursor B/N ratios on the morphology and pore parameters of BNC were studied. Methyl orange anionic dye was selected to investigate the adsorption behavior on BNC. X-ray diffraction (XRD), N2 adsorption and desorption and transmission electron microscopy (TEM) were used to characterize the morphology of prepared BNC samples. The results showed that BNC had a two-dimensional hexagonal ordered structure (p6mm) with a pore size distribution centered at 3-6 nm. The increasing B/N ratio of the precursor appropriately enhanced the pore size, but when the B/N ratio is higher than 1, the BNC specific surface area and pore size gradually decrease as the precursor B/N ratio increases, and ordered structure is also partially destroyed. Among them, BNC-1 exhibited the highest specific surface area (1 560 m2 / g), large pore volume (1.92 cm3 / g). Detailed X-ray photoelectron spectroscopy (XPS) analysis of BNC showed that the atomic percentage of boron and nitrogen can be adjusted up to 4.95 % and 6.32 %, respectively. To the best of our knowledge, such a high boron doping level has not been reported previously. High-resolution B1s spectra indicated that the BNC mainly contained B-O and B-C groups. High resolution N1s spectra revealed that the BNC mainly contained pyrrolic-like N atom, pyridine-like N atom and N-O group. In addition, the adsorption capacity of methyl orange dye on BNC-1 and activated carbon were studied by using a UV-Vis spectrophotometer. Compared to the conventional activated carbon adsorbent (61 mg / g), BNC-1 prepared in this paper achieved rapid and effective adsorption performance (213.53 mg / g), which showed great potential as efficient adsorbent for removal of methyl orange dye.