Abstract
Employing thiourea as precursor, the bulk graphitic carbon nitride (named SCN) was prepared via thermal polymerization strategy. The SCN was then stripped and treated by different concentrations of NaOH solution, and then porous carbon nitride SCN with loose structure was obtained and characterized by X-ray diffraction (XRD), N2 adsorption, scanning electron microscope (SEM), transmission electron microscopy (TEM), photoluminescence (PL). Then catalytic performance of the obtained porous carbon nitride SCN samples was evaluated by degrading methyl blue solution (MB). The results show that the normal pressure alkaline treatment is an effective way to prepare porous carbon nitride. After being treated by NaOH solution of 0.3 mol/L, the specific surface area of SCN increased to three times than that of bulk SCN. The synergistic effect of adsorption and photocatalysis boosts the photocatalytic efficiency of SCN by 1.78 times compared with bulk SCN, and the first-order reaction rate constant Kapp is increased by 2.9 times.
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