The invention provides a preparation method of a functional wood material with a
photocatalytic degradation function. The preparation method solves the problems that a wood material is easily polluted, color change under
ultraviolet light is large, and the catalyzing efficiency of
photocatalytic degradation of organic dyestuff through a single catalyst is low. The preparation method comprises thesteps that first, surface activation is conducted on the wood material through a
sodium hydroxide solution; g-C3N4 after being subjected to protonated treatment is loaded on the surface of the wood material through a vacuum impregnation method; and taking
ammonium fluorotitanate and
urea as raw materials, TiO2 is grown on the surface of the wood material which is loaded with the g-C3N4, and the functional wood material with the photocatalytic activity is obtained through the steps of heat preservation, cleaning and the like. The degradation rate of
rhodamine B and a
methylene blue solution with the
mass concentration being 2 mg / L and under
ultraviolet illumination within four hours can reach to 95% or above through the functional wood material, change in
color difference of the surface ofthe wood material after being subjected to
ultraviolet light aging can be effectively reduced, color stability of the surface of the wood material is greatly improved, and the preparation technology has the advantages that the technology is simple, operation is easy, the cost is low, and the environment-friendly effect is achieved.