Preparation of wood-based g-C₃N₄/TiO₂ composite coating and characterization of its photocatalytic properties

To improve the drawback of wood that is easily polluted and mildewed and impart self-cleaning property to the wood products, we made functional improvements to wood. The g-C₃N₄/TiO₂ composite coating was grown on wood surface via vacuum impregnation and liquid phase precipitation method. The g-C₃N₄/TiO₂ composite coating was characterized by scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FT-IR). The photocatalytic activity of g-C₃N₄/TiO₂ composite coated wood was measured by UV-VIS spectrophotometer with Rhodamine B as a target pollutant. The results indicated that g-C₃N₄/TiO₂ composite coating was successfully immobilized on the surface of wood and the doping of g-C₃N₄ and TiO₂ effectively improved its photocatalytic activity. The wood surface is successfully endowed with self-cleaning properties.