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Activated carbon fiber loading titanium dioxide composite photocatalytic material and preparation method and application thereof

A technology of activated carbon fiber and composite photocatalysis, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc. Ideal, poor synergistic effect and other problems, to achieve the effect of improving photocatalytic activity and reusability, improving binding rate and binding firmness, and reducing deposition amount

Inactive Publication Date: 2015-09-09
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Chinese patent CN101318129A discloses a supported photocatalyst and its preparation method. Chinese patent CN103100378A discloses a preparation method of activated carbon fiber-supported titanium dioxide photocatalyst. In the technical solutions disclosed in the two patent documents, the TiO2 loaded on the catalyst 2 Anatase TiO can be formed on the surface of ACF 2 film, but the prepared catalyst interstitial TiO on activated carbon fibers 2 The amount of deposition is large, resulting in most of the TiO 2 It is not loaded on the surface of activated carbon fibers, so the synergistic effect of photocatalysis and adsorption cannot be fully achieved.
[0005] Chinese patent CN102910767A discloses a preparation method of activated carbon fiber supported titanium dioxide photocatalyst by hydrothermal method, which can increase the active functional groups on the surface of activated carbon fiber and help to enhance the loading capacity of activated carbon fiber surface and titanium dioxide The amount of titanium dioxide deposited between the fibers is still large, and the synergistic effect of photocatalysis and adsorption is not good
[0006] In summary, the current preparation methods of activated carbon fiber-loaded titanium dioxide composite photocatalytic materials are weak and uneven, and most of the titanium dioxide is deposited in the gaps of activated carbon fibers and is easy to fall off. The synergistic effect of photocatalysis and adsorption is not ideal, etc. question

Method used

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  • Activated carbon fiber loading titanium dioxide composite photocatalytic material and preparation method and application thereof
  • Activated carbon fiber loading titanium dioxide composite photocatalytic material and preparation method and application thereof
  • Activated carbon fiber loading titanium dioxide composite photocatalytic material and preparation method and application thereof

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Effect test

Embodiment 1

[0035] Prepare activated carbon fiber-loaded titanium dioxide composite photocatalytic material according to the following steps:

[0036] (1) Take the specific surface area as 1500m 2 / g of activated carbon fibers, cut to a cross-section of 2cm×2cm; soak in absolute ethanol, 0.5mol / L sodium hydroxide solution, and dilute nitric acid solution for 30min, wash with deionized water, and dry at 120°C for 24h. Get the activated carbon fiber after pretreatment;

[0037](2) Take 38.9ml of absolute ethanol, mix it with 56.7ml of tetrabutyl titanate and 5.2ml of acetylacetone, and stir thoroughly to obtain solution A; then take 19.4ml of absolute ethanol, adjust the pH to 10 with 12ml of methylamine Mix with deionized water and stir thoroughly to obtain solution B; under stirring conditions, slowly add solution B to solution A dropwise, and continue stirring at 35°C for 1 hour to obtain titanium dioxide sol;

[0038] (3) Take 6g of activated carbon fibers pretreated in step (1), and ...

Embodiment 2

[0042] (1) Take the specific surface area as 1500m 2 / g of activated carbon fibers, cut to a cross-section of 3cm×3cm; soak in absolute ethanol, 0.5mol / L sodium hydroxide solution, and dilute nitric acid solution for 30min, wash with deionized water, and dry at 120°C for 24h. Get the activated carbon fiber after pretreatment;

[0043] (2) Take 13ml of absolute ethanol, mix it with 18.9ml of tetrabutyl titanate and 1.7ml of acetylacetone, and stir thoroughly to obtain solution A; then take 6.5ml of absolute ethanol, mix it with 4ml of the Mix deionized water and stir thoroughly to obtain solution B; under stirring conditions, slowly add solution B to solution A dropwise, and continue stirring at 35°C for 1 hour to obtain titanium dioxide sol;

[0044] (3) Take 2g of the activated carbon fiber pretreated in step (1), and immerse it in the titania sol obtained in step (2); at 45°C, treat it with an ultrasonic wave with a frequency of 40kHz for 30min, and leave it to age at a con...

Embodiment 3

[0047] (1) Take the specific surface area as 1500m 2 / g of activated carbon fibers, cut to a cross-section of 4cm×4cm; soak in absolute ethanol, 0.5mol / L sodium hydroxide solution, and dilute nitric acid solution for 30min, wash with deionized water, and dry at 120°C for 24h. Get the activated carbon fiber after pretreatment;

[0048] (2) Take 38.9ml of absolute ethanol, mix it with 56.7ml of tetrabutyl titanate and 5.2ml of acetylacetone, and stir thoroughly to obtain solution A; then take 19.4ml of absolute ethanol, adjust the pH to 10 with 12ml of methylamine Mix with deionized water and stir thoroughly to obtain solution B; under stirring conditions, slowly add solution B to solution A dropwise, and continue stirring at 35°C for 1 hour to obtain titanium dioxide sol;

[0049] (3) Get 6g of activated carbon fibers pretreated in step (1), and immerse them in the titania sol obtained in step (2); under the condition of 55° C., treat them with an ultrasonic wave with a freque...

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Abstract

The invention relates to an activated carbon fiber loading titanium dioxide composite photocatalytic material and a preparation method and application thereof, According to the method, by ultrasonic aided sol-gel method, titanium dioxide sol formed by the hydrolysis of a titanium-containing compound is loaded onto the surface of activated carbon fiber, and after drying, the titanium dioxide / carbon fiber composite photocatalytic material is obtained by heat treatment system in a protective gas. The ultrasonic aided sol-gel method is simple in process, and can be used in industrial production, the titanium dioxide is loaded evenly and firmly onto the surface of the activated carbon fiber, and the less amount of the titanium dioxide is deposited among activated carbon fiber gaps. The activated carbon fiber loading titanium dioxide composite photocatalytic material has good photocatalytic performance and repeated use property, and can be applied to air purification field.

Description

technical field [0001] The invention relates to the field of catalytic materials, in particular to an activated carbon fiber-loaded titanium dioxide composite photocatalytic material and a preparation method thereof. Background technique [0002] With the development of society, environmental pollution is becoming more and more serious, and the purification treatment of indoor air has gradually attracted people's attention. As an advanced oxidation technology, heterogeneous photocatalytic oxidation technology can non-selectively mineralize various organic pollutants in the environment under normal temperature and pressure, and is considered to be an environmental treatment technology with great application potential. Among many photocatalysts, titanium dioxide (TiO 2 ) has become the most widely used photocatalyst due to its stable physical and chemical properties, non-toxicity, high photocatalytic activity, low selectivity to degradation of organic matter, complete mineral...

Claims

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Application Information

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IPC IPC(8): B01J21/18B01D53/86B01D53/72
Inventor 黎汉生胡菊吴芹赵芸矫庆泽
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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