Abstract：In order to improve the photocatalytic performance of graphitic carbon nitride (g-C3N4), g-C3N4 supported carbon microsphere composites were prepared by blending g-C3N4 with polyvinyl alcohol (PVA) solution. The composites were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier infrared spectroscopy (FTIR) and ultraviolet-visible spectrophotometer (UV-Vis). The composite materials were used to catalyze the degradation of wastewater to test their photocatalytic performance. The results showed that the addition of 0.2 mL of 30 g/L polyvinyl alcohol to 0.3 g g-C3N4 could be used to form carbon microspheres on the surface of the g-C3N4 sheet after high temperature calcination (CN-0.2). Compared with the original g-C3N4 (CN), the photocatalytic degradation rate of the methylene solution catalyzed with the g-C3N4 supported carbon microsphere composite catalyst was obviously improved. The first order degradation rate constant of CN-0.2 was 0.047 8 min-1, about 2.8 times of that of CN. Because the carbon microspheres increased the absorption of visible light by the catalysts, the specific surface area of the composite material was improved and the transfer of photogenerated electronics was promoted.
YANG Kuan,LI Huiqin,REN Xinxin et al. Study on Photocatalytic Performance of Graphitic Carbon Nitride Loading Carbon Microspheres[J]. Chemical Reaction Engineering and Technology, 2020, 36(2): 170-176.
