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Preparation method for functional wood capable of degrading organic pollutants through photocatalysis

A technology of organic pollutants and photocatalysis, applied in the field of photocatalytic materials, can solve the problems of loss of nano effect, easy aggregation of nanoparticles, and reduction of specific surface area, etc., and achieve strong catalytic degradation ability, good degradation ability, and good degradation effect Effect

Active Publication Date: 2017-03-15
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the doping process, nanoparticles are easy to aggregate, thereby reducing the specific surface area, reducing the contact area between the catalyst and the degraded substance, and losing the nano-effect

Method used

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  • Preparation method for functional wood capable of degrading organic pollutants through photocatalysis

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] An embodiment of the preparation method of the functional wood that can photocatalytically degrade organic pollutants of the present invention, the preparation method of the functional wood comprises the following steps:

[0033] (1) The sawn poplar (length, height and width are respectively: 100mm × 10mm × 100mm) was ultrasonically treated at a power of 600W in 5% potassium hydroxide solution for 6 hours to get through the pores inside the wood and The hydroxyl groups on the wood surface were exposed, rinsed with deionized water after sonication, and the wood was dried under vacuum.

[0034](2) Weigh 0.01mol of Bi(NO 3 ) 3 .5H 2 O was dissolved in 100 ml of glacial acetic acid solution with a mass fraction of 10%, vinyltris(methoxyethoxy)silane coupling agent was added, and the mixture was stirred thoroughly at room temperature to obtain a mixed solution. Wherein, the addition amount of the vinyl tris(methoxyethoxy)silane coupling agent is 1% of the mass of the mixe...

Embodiment 2

[0040] An embodiment of the preparation method of the functional wood that can photocatalytically degrade organic pollutants of the present invention, the preparation method of the functional wood comprises the following steps:

[0041] (1) Treat the sawn poplar wood (length, height and width: 150mm×120mm×150mm) under 15kW microwave for 50s to open the pores inside the wood and expose the hydroxyl groups on the surface of the wood, and then The microwave-treated wood was sawn and cut into 100mm×10mm×100mm test pieces for later use.

[0042] (2) Weigh 0.01mol of Bi(NO 3 ) 3 .5H 2 O was dissolved in 100 ml of glacial acetic acid solution with a mass fraction of 10%, vinyltrimethoxysilane coupling agent was added, and the mixture was stirred thoroughly at room temperature to obtain a mixed solution. Wherein, the addition amount of the vinyltrimethoxysilane coupling agent is 1% of the mass of the mixed solution.

[0043] (3) Weigh 0.004 mol of KI and 0.006 mol of KCl and disso...

Embodiment 3

[0048] An embodiment of the preparation method of the functional wood that can photocatalytically degrade organic pollutants of the present invention, the preparation method of the functional wood comprises the following steps:

[0049] An embodiment of the preparation method of the functional wood that can photocatalytically degrade organic pollutants of the present invention, the preparation method of the functional wood comprises the following steps:

[0050] (1) Treat the sawn poplar wood (length, height and width: 150mm×120mm×150mm) under 20kW microwave for 40s to open the pores inside the wood and expose the hydroxyl groups on the surface of the wood, and then The microwave-treated wood was sawn and cut into 100mm×10mm×100mm test pieces for later use.

[0051] (2) Weigh 0.02mol of Bi(NO 3 ) 3 .5H 2 O was dissolved in 100 ml of glacial acetic acid solution with a mass fraction of 10%, vinyltriethoxysilane coupling agent was added, and the mixture was stirred thoroughly...

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Abstract

The invention discloses a preparation method for functional wood capable of degrading organic pollutants through photocatalysis. The preparation method comprises the following steps that wood is subjected to pretreatment, internal pores of the wood are gotten through, and hydroxyl on the surface of the wood is exposed; bismuth nitrate is taken to be dissolved in an acid solution, then, coupling agents are added, stirring is conducted, and a mixed solution is obtained; soluble iodized salts and soluble chlorate are taken to be dissolved in water, stirring is conducted for dissolving, and a halide salt solution is obtained; the pretreated wood is soaked into the mixture solution, subjected to pressurized soaking, taken out and dewatered, and the wood adsorbed with bismuth ions is obtained; the wood adsorbed with the bismuth ions is soaked into the halide salt solution, subjected to pressurized soaking, taken out and subjected to vacuum drying, and then the functional wood capable of degrading the organic pollutants through photocatalysis can be obtained. The functional wood prepared through the method is high in light use ratio, can effectively degrade the organic pollutants under visible light radiation and is good in degradation effect.

Description

technical field [0001] The invention relates to the technical field of photocatalytic materials, in particular to a method for preparing functional wood capable of photocatalytically degrading organic pollutants. Background technique [0002] With the rapid development of industry, harmful gases emitted by factories and automobile exhaust emissions have caused a sharp decline in air quality. It is of great significance to develop materials that can effectively remove harmful organic compounds in the air. Photocatalytic degradation plays an important role in solving environmental problems due to its environmental protection and no secondary pollution. As a new type of semiconductor catalyst, BiOCl has a unique layered structure and a large band gap (3.46eV). Effective photocatalytic degradation of organic pollutants. [0003] However, due to the wide band gap of BiOCl, it can only respond to ultraviolet light which accounts for only about 4% of sunlight, which greatly redu...

Claims

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Application Information

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IPC IPC(8): B27K3/02B27K3/08B27K3/52B27K5/04B27K3/20B01D53/88B01D53/72
CPCB01D53/8668B01D53/88B01D2257/7027B01D2257/708B27K3/0207B27K3/08B27K3/20B27K3/52B27K5/04
Inventor 吴义强田翠花卿彦李新功李贤军罗莎
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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