Preparation method of functional wood material with photocatalytic activity

Abstract

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.

Description

technical field [0001] The invention relates to a preparation method of functional wood for photocatalytic degradation of organic dyes. Background technique [0002] Wood is a renewable and recyclable natural polymer with many advantages such as light weight, high strength, heat insulation, insulation, impact resistance, sound insulation, and humidity control. It is widely used in furniture, construction and other fields. However, wood has natural defects such as easy discoloration and pollution, especially after long-term ultraviolet radiation, the color of wood changes greatly, which seriously shortens the service life of wood. TiO 2 It has the advantages of cheap, non-toxic, and good chemical stability, and some scholars have identified TiO 2 As a photocatalyst compounded on the surface of wood, it can improve the traditional properties of wood and give wood new functions such as antibacterial and photocatalytic properties. But TiO 2 The low quantum effect and high el...

AI Technical Summary

Problems solved by technology

But g-C 3 N 4 There is a significant disadvantage, that is, the photogenerated charge is easy to recombine and the quantum efficiency is low, which affects its photocatalytic performance.

[0003] In summary, the existing wood has problems such as easy to be polluted and poor UV aging resistance, and g-C 3 N 4 or TiO 2 The photocatalytic degradation of organic dyes with a single catalyst has problems such as low catalytic efficiency and difficult recovery