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Zinc acetate modified activated carbon fiber and titanium dioxide composite material and preparation method thereof

A technology of activated carbon fiber and titanium dioxide, which is applied in the field of environmental engineering, can solve the problems of inability to achieve efficient treatment, reduce specific surface area, low photocatalytic ability, etc., achieve excellent adsorption performance and photocatalytic performance, simple preparation steps, and high-efficiency removal effects.

Pending Publication Date: 2020-02-28
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For VOCs, the main treatment technologies are adsorption, condensation, incineration, catalytic combustion, photocatalysis, etc. However, a single treatment technology can no longer achieve efficient removal of pollutants. Some scholars have combined adsorption with photocatalysis technology. Activated carbon fiber and titanium dioxide Composite materials are a new type of materials that combine adsorption and photocatalysis to treat VOCs.
[0003] At present, although the activated carbon fiber and titanium dioxide composite material prepared by the current method realizes the combination of adsorption and photocatalysis, it cannot achieve the effect of one plus one greater than two. The main reason is that the activated carbon fiber is loaded with titanium dioxide, which blocks the activated carbon. The adsorption pores on the fiber reduce the specific surface area, thereby reducing the adsorption performance. Moreover, in the composite materials prepared by most researchers, the titanium dioxide is only loaded on the surface of the activated carbon fiber, with low loading and low photocatalytic ability. for efficient processing

Method used

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  • Zinc acetate modified activated carbon fiber and titanium dioxide composite material and preparation method thereof
  • Zinc acetate modified activated carbon fiber and titanium dioxide composite material and preparation method thereof
  • Zinc acetate modified activated carbon fiber and titanium dioxide composite material and preparation method thereof

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preparation example Construction

[0025] The embodiment of the present invention provides a preparation method of zinc acetate modified activated carbon fiber and titanium dioxide composite material, comprising the following steps:

[0026] S1 Activated carbon fiber modification: soak the activated carbon fiber in zinc acetate solution, perform ultrasonic treatment, then put it in a vacuum drying oven for vacuum impregnation treatment, repeat the ultrasonic treatment and vacuum impregnation treatment, and take out the activated carbon fiber impregnated with zinc acetate and drying to obtain zinc acetate modified activated carbon fiber;

[0027] S2 supported titanium dioxide: add tetrabutyl titanate to the mixture of absolute ethanol and acetic acid, and stir to make solution A; mix absolute ethanol, acetic acid and deionized water, and stir to make solution B; stir vigorously , drop solution B into solution A drop by drop, stir after the dropwise addition, and leave it to age at room temperature to obtain a so...

Embodiment 1

[0039] (1) Activated carbon fiber pretreatment: Cut the activated carbon fiber into several small pieces of 2cm×2cm, soak them in deionized water, and carry out boiling treatment to remove impurities. During the boiling treatment, replace the deionized water every 0.5h. After changing the water Boil again, the total time of boiling treatment is 3h, take out the activated carbon fiber sheet, and place it in a 105°C oven to dry for 24h.

[0040] (2) Activated carbon fiber modification: Take 10 pretreated activated carbon fiber sheets and soak them in 100mL zinc acetate solution with a concentration of 0.01mol / L, and perform ultrasonic treatment on the zinc acetate solution and activated carbon fiber sheets together. 10min, the ultrasonic power is 5000Hz, then put the zinc acetate solution and the activated carbon fiber sheet into the vacuum drying oven for vacuum impregnation treatment, the vacuum impregnation treatment time is 10min, the vacuum degree is controlled within 0.06 ~...

Embodiment 2

[0043] The only difference from Example 1 is that the concentration of the zinc acetate solution is 0.05mol / L. Other steps are all the same as in Example 1.

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Abstract

The invention provides a zinc acetate modified activated carbon fiber and titanium dioxide composite material and a preparation method thereof, and belongs to the technical field of environmental engineering, the composite material has excellent adsorption performance and photocatalytic performance at the same time and has an efficient removal effect on high-concentration volatile organic compounds, and the preparation method of the composite material is simple and easy to implement. Preparation cost is low. The preparation method of the composite material comprises the following steps: immersing activated carbon fibers in a zinc acetate solution, carrying out ultrasonic treatment, then carrying out vacuum impregnation treatment, repeating the ultrasonic treatment and the vacuum impregnation treatment once, taking out and drying to obtain zinc acetate modified activated carbon fibers; preparing a sol of a titanium dioxide precursor, soaking the zinc acetate modified activated carbon fibers in the sol, carrying out ultrasonic treatment, carrying out vacuum impregnation treatment, repeating the ultrasonic treatment and the vacuum impregnation treatment once, taking out, drying and roasting to obtain the composite material.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and in particular relates to a composite material of zinc acetate modified activated carbon fiber and titanium dioxide and a preparation method thereof. Background technique [0002] As a pillar industry of the national economy, the petroleum and petrochemical industry provides the necessary petroleum energy and chemical products for social development, but at the same time, the problem of environmental pollution is becoming increasingly prominent. The components of waste gas emitted by petrochemical enterprises are complex, with volatile organic compounds (VOCs) as the main component, including a variety of toxic and harmful gases, such as benzene series, aldehydes and ketones, halogenated hydrocarbons, alcohols, etc., among which some components It is carcinogenic and seriously threatens the atmospheric environment and human health. For VOCs, the main treatment technologies a...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01D53/86B01J23/06B01J35/10B01J20/30B01D53/02
CPCB01J20/20B01J23/06B01D53/02B01D53/8687B01J35/39B01J35/61
Inventor 刘芳齐学进李雨薇张帅李孟王永强赵朝成韩丰磊
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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