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Titanium dioxide/active carbon fiber photocatalyst and its preparation method and uses in air purification

A photocatalyst and titanium hydroxide technology, which is applied in the field of air purification, can solve the problem that the optimal process conditions have not been reported, and achieve the effects of no secondary pollution, high photocatalytic efficiency, and efficient secondary pollution.

Inactive Publication Date: 2009-10-21
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, by loading TiO on ACF 2 There are relatively few research reports on the improvement of photocatalytic degradation of gaseous volatile organic pollutants by photocatalysts, which have very important application prospects, and the optimal process conditions for the gas-phase photocatalytic degradation of toxic organic compounds such as benzene and ether have not been found. There are reports

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  • Titanium dioxide/active carbon fiber photocatalyst and its preparation method and uses in air purification
  • Titanium dioxide/active carbon fiber photocatalyst and its preparation method and uses in air purification

Examples

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Embodiment 1

[0023] (1) Add ammonia water to Ti(SO 4 ) 2 In the solution, adjust the pH value of the solution to 7, filter and wash the white amorphous flocculent precipitate, and beat the washed precipitate to obtain a titanium hydroxide emulsion, which is oxidized by molar ratio in the titanium hydroxide emulsion. Titanium: sulfuric acid 1:0.005, add dilute sulfuric acid solution (distilled water: sulfuric acid is 2:1 by volume ratio), stir evenly and vibrate in ultrasonic wave for 60 minutes to obtain acidified emulsion, which is sealed and stored.

[0024] (2) Soak in distilled water and then ultrasonically wash the activated carbon fiber cloth (specific surface 1000m 2 / g, benzene adsorption saturation 35%) 2 times, after washing clean, dry at 50 ℃, immerse in the above-mentioned 10% acidified emulsion (mass volume ratio) that makes, take out after vibrating in ultrasonic wave for 60 minutes, at 50 The photocatalyst precursor loaded with one layer of titanium hydroxide can be prepar...

Embodiment 2

[0027] (1) Add ammonia water to Ti(SO 4 ) 2 In the solution, a white amorphous flocculent precipitate is formed, filtered and washed, and the washed precipitate is beaten to obtain a titanium hydroxide emulsion. In the titanium hydroxide emulsion, the molar ratio of titanium hydroxide: sulfuric acid is 1: 0.05 and dilute Sulfuric acid solution (prepared by distilled water: sulfuric acid at a volume ratio of 6: 1), stirred evenly, and then vibrated in an ultrasonic wave for 30 minutes to obtain an acidified emulsion, which was sealed and stored.

[0028] (2) Soak in distilled water and then ultrasonically wash activated carbon fiber felt (specific surface 1200m 2 / g, benzene adsorption saturation 50%) 3 times, after washing clean, dry at 80 ℃, immerse in the above-mentioned 8% acidified emulsion (mass volume ratio) that makes, take out after vibrating in ultrasonic wave for 30 minutes, at 80 The photocatalyst precursor loaded with one layer of titanium hydroxide can be prepar...

Embodiment 3

[0031] (1) Add ammonia water to Ti(SO 4 )2 In the solution, a white amorphous flocculent precipitate is formed, filtered and washed, and the washed precipitate is beaten to obtain a titanium hydroxide emulsion. In the titanium hydroxide emulsion, the molar ratio of titanium hydroxide: sulfuric acid is 1: 0.10 and dilute Sulfuric acid solution (prepared by volume ratio of distilled water: sulfuric acid is 10:1), stirred evenly and then vibrated in ultrasonic wave for 60 minutes to obtain acidified emulsion, sealed and preserved.

[0032] (2) Soak in distilled water and then ultrasonically wash activated carbon fiber felt (specific surface 1200m 2 / g, benzene adsorption saturation 50%) once, washed and dried at 100°C, immersed in the 5% acidified emulsion (mass volume ratio) prepared above, taken out after oscillating in ultrasonic waves for 60 minutes, at 100 The photocatalyst precursor loaded with one layer of titanium hydroxide can be prepared by drying at ℃. Repeat the ope...

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Abstract

The invention belongs to the technical field of air purification, and discloses a TiO2 / ACF photocatalyst and a preparation method thereof. The method comprises the following steps: adding a dilute sulfuric acid solution into a titanium hydroxide emulsion, stirring evenly, and oscillating in an ultrasonic wave to obtain an acidified Emulsion; activated carbon fibers are soaked in distilled water and then ultrasonically washed, dried after washing, immersed in the acidified emulsion prepared above, taken out after vibrating in ultrasonic waves, and dried to obtain a photocatalyst precursor loaded with titanium hydroxide material; the above-mentioned photocatalyst precursor is made into a TiO2 / ACF photocatalyst after being calcined and kept warm. The invention also discloses the application of the TiO2 / ACF photocatalyst in the purification of harmful volatile organic compounds in the air. The invention has the advantages of simple preparation process, high photocatalytic efficiency, low price and certain practical application value.

Description

technical field [0001] The invention belongs to the technical field of air purification, in particular to a TiO 2 (Titanium dioxide) / ACF (activated carbon fiber) immobilized photocatalyst and its preparation method and application. Background technique [0002] With the improvement of living standards, a large number of petroleum products and daily necessities and decorations that can produce volatile organic compounds (volatile organic compounds, VOCs), especially the building materials and paints and coatings used in interior decoration, have continuously entered people's lives. living room and workplace. While people are enjoying the comfort and satisfaction brought by these products, they are constantly producing various pollutants and harmful substances, which damage the indoor air quality. Building energy saving, indoor heat preservation, central air-conditioning, etc. make the living room and office space better sealed, and the pollutants generated in the room are d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J37/02B01J37/08B01J21/06B01D53/34A61L9/00
Inventor 安太成胡晓洪傅家谟曾祥英盛国英
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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