Preparation method of functional wood material with photocatalytic activity

A photocatalytic activity and functional technology, applied in chemical instruments and methods, wood treatment, wood impregnation, etc., can solve the problems of easy pollution, low quantum efficiency, poor UV aging resistance, etc., and achieve easy process control and preparation process. Simple, low production cost effect

Active Publication Date: 2018-03-16
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] 3g of sodium hydroxide was dissolved in 27g of distilled water to prepare a 10wt% sodium hydroxide solution, and the wood was ultrasonically impregnated for 10 minutes to activate the wood surface, washed with deionized water, and dried. Weigh a certain amount of melamine into a covered quartz crucible, raise the temperature to 550°C in a tube furnace, keep it for 4 hours, cool to room temperature naturally, and grind to obtain g-C 3 N 4 ; put 1g g-C 3 N 4 Disperse in 18.5wt% hydrochloric acid, stir at room temperature, ultrasonicate at 600W for 6h, disperse the suspension in 500mL deionized water, settle for 12h, centrifuge to collect the precipitate, wash with deionized water until neutral, and dry. Protonated g-C 3 N 4 Disperse in absolute ethanol, ultrasonically treat at 420W for 10min, place the activated wood specimen in g-C 3 N 4 Put the ethanol suspension into a vacuum chamber, turn on the vacuum pump for 20 minutes, and vacuum impregnate it for 18 hours u...

example 2

[0019] 3g of sodium hydroxide was dissolved in 27g of distilled water to prepare a 10wt% sodium hydroxide solution, and the wood was ultrasonically impregnated for 10 minutes to activate the wood surface, washed with deionized water, and dried. Weigh a certain amount of melamine into a covered quartz crucible, raise the temperature to 550°C in a tube furnace, keep it for 4 hours, cool to room temperature naturally, and grind to obtain g-C 3 N 4 ; put 1g g-C 3 N 4 Disperse in 18.5wt% hydrochloric acid, stir at room temperature, ultrasonicate at 600W for 4h, disperse the suspension in 500mL deionized water, settle for 12h, centrifuge to collect the precipitate, wash with deionized water until neutral, and dry. Protonated g-C 3 N 4 Disperse in absolute ethanol, ultrasonically treat at 420W for 10min, place the activated wood specimen in g-C 3 N 4 In the ethanol suspension, put it into a vacuum chamber, turn on the vacuum pump for 15 minutes, and vacuum impregnate it for 12 ...

example 3

[0021] 3g of sodium hydroxide was dissolved in 27g of distilled water to prepare a 10wt% sodium hydroxide solution, and the wood was ultrasonically impregnated for 10 minutes to activate the wood surface, washed with deionized water, and dried. Weigh a certain amount of melamine into a covered quartz crucible, raise the temperature to 550°C in a tube furnace, keep it for 4 hours, cool to room temperature naturally, and grind to obtain g-C 3 N 4 ; put g-C 3 N 4 Dispersed in 18.5wt% hydrochloric acid, stirred at room temperature, ultrasonicated at 600W for 2h, dispersed in 500mL deionized water, settled for 12h, centrifuged to collect the precipitate, washed with deionized water until neutral, and dried. Protonated g-C 3 N 4 Disperse in absolute ethanol, ultrasonically treat at 420W for 20min, place the activated wood specimen in g-C 3 N 4 Put it in the ethanol suspension in a vacuum chamber, turn off the vacuum pump after 20 minutes, and vacuum impregnate for 6 hours at a...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): B27K3/52B27K5/00B27K3/10B27K5/04B27K3/02C02F1/32C02F101/30B01J27/24
CPCB01J27/24B01J35/004B27K3/0207B27K3/10B27K3/52B27K5/0065B27K5/0085B27K5/04C02F1/32C02F2101/308C02F2305/10
Inventor 郭明辉董悦袁炳楠黄占华
Owner NORTHEAST FORESTRY UNIVERSITY
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