Composite-photocatalyst-supported silicon material preparation method

A technology of catalyst and silicon material, which is applied in catalyst activation/preparation, chemical instruments and methods, botanical equipment and methods, etc., can solve the problems of complicated preparation steps, high cost of raw materials, long reaction period, etc. The effect of fast speed and uniform load distribution

Inactive Publication Date: 2017-01-04
QINGDAO LANNONGGU AGRI PROD RES & DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation methods of graphene nanocomposite photocatalysts reported in the literature have high raw material costs or are not friendly enough, and the preparation steps are cumbersome, requiring high temperature or high pressure, especially the long reaction cycle, which is not conducive to popularization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of preparation method of the silicon material of supporting composite photocatalyst, it is characterized in that, specifically comprises the steps:

[0022] (1) Raw material pretreatment: take the microporous silica material and add 3 times the volume of deionized water, add the mixed solution with a volume percentage of 2% sodium hydroxide with a concentration of 0.3mol / L and hydrogen with a concentration of 0.3mol / L Potassium oxide is composed of a strong alkali solution with a weight ratio of 2:3, soaked for 15 hours, after vacuuming, fill the solution with reducing gas, and perform heat treatment at 700 °C;

[0023] (2) Loaded titanium dioxide carrier: Mix tetrabutyl titanate and ethanol evenly, add hydrofluoric acid solution, put the mixed solution into an autoclave with a polytetrafluoroethylene liner, and oxidize the above-mentioned heat-treated microporous The silicon material is placed in an autoclave, and the temperature is controlled at 160°C for 5 hou...

Embodiment 2

[0030] A kind of preparation method of the silicon material of supporting composite photocatalyst, it is characterized in that, specifically comprises the steps:

[0031] (1) Raw material pretreatment: take the microporous silica material and add 3 times the volume of deionized water, add 0.3mol / L sodium hydroxide and 0.3mol / L hydrogen with a volume percentage of 3% of the mixed solution Potassium oxide is composed of a strong alkali solution with a weight ratio of 2:3, soaked for 16 hours, after vacuuming, fill the solution with reducing gas, and perform heat treatment at 600 °C;

[0032] (2) Loaded titanium dioxide carrier: Mix tetrabutyl titanate and ethanol evenly, add hydrofluoric acid solution, put the mixed solution into an autoclave with a polytetrafluoroethylene liner, and oxidize the above-mentioned heat-treated microporous The silicon material is placed in an autoclave, and the temperature is controlled at 165°C for 4 hours;

[0033] (3) Prepare the inner layer sol...

Embodiment 3

[0039] A kind of preparation method of the silicon material of supporting composite photocatalyst, it is characterized in that, specifically comprises the steps:

[0040] (1) Raw material pretreatment: Take the microporous silica material and add 3 times the volume of deionized water, add 0.3mol / L sodium hydroxide and 0.3mol / L hydrogen with a volume percentage of 4% of the mixed solution Potassium oxide is composed of a strong alkali solution with a weight ratio of 2:3, soaked for 18 hours, filled with reducing gas into the solution after vacuuming, and heat-treated at 500 °C;

[0041] (2) Loaded titanium dioxide carrier: Mix tetrabutyl titanate and ethanol evenly, add hydrofluoric acid solution, put the mixed solution into an autoclave with a polytetrafluoroethylene liner, and oxidize the above-mentioned heat-treated microporous The silicon material is placed in an autoclave, and the temperature is controlled at 170°C for 3 hours;

[0042] (3) Prepare the inner layer solutio...

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PUM

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Abstract

The invention discloses a composite-photocatalyst-supported silicon material preparation method, which specifically comprises: (1) pre-treating raw materials; (2) loading a titanium dioxide carrier; (3) preparing an inner layer solution; (4) preparing an outer layer solution; (5) carrying out primary impregnation; and (6) carrying out secondary impregnation. According to the present invention, the silicon material is subjected to the heat treatment by adding the strong alkali solution, such that the controllability is strong, and the too low surface energy of the silicon material is easily increased; by using the Ti3+ in-situ assisted reduction method, the noble metal nanoparticles are uniformly distributed on the carrier titanium dioxide surface, such that the loading distribution is uniform, the interface binding is solid, and the photo-oxidation reaction is efficiently and selectively performed; the microwave radiation treatment is performed in the inner solution, such that the conditions are mild, the reaction rate is rapid, and the yield is high; and the carbon atoms of the graphene adopt the sp2 hybridization linkage, such that the good adsorption ability to pollutants is provided, the obtained silicon material loads the graphene, the high structural stability and the thermal stability are provided, and the adsorption capacity of the material under the mild condition is effectively improved.

Description

technical field [0001] The invention belongs to the field of preparation of new materials, and in particular relates to a preparation method of a silicon material loaded with a composite photocatalyst. Background technique [0002] With the rapid development of industry, a large amount of industrial wastewater containing toxic organic pollutants has flowed into the environment, causing serious harm to human health, which has prompted people to strengthen the development of sewage pollution treatment technology. Catalytic degradation of organic pollutants by silicon materials has outstanding advantages such as low energy consumption, high efficiency, simple operation, wide applicability, and complete pollutant degradation. It is a promising green technology. [0003] Silicon materials are widely used in the environmental protection industry, and have the advantages of large specific surface area, high porosity, strong adsorption, and good chemical stability. If the nano-mult...

Claims

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Application Information

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IPC IPC(8): B01J21/18B01J23/656B01J37/34B01J20/10B01J20/06B01J20/20B01J20/26B01J20/32C02F1/28C02F1/30C02F1/50C02F1/72A01N59/16A01P1/00C02F101/38C02F103/30
Inventor 李红伟
Owner QINGDAO LANNONGGU AGRI PROD RES & DEV
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