Nano-TiO2/activated carbon fibrofelt three-dimensional porous material high in adsorption and photocatalytic performance, and preparation method thereof

A technology of activated carbon fiber felt and nano-titanium dioxide is applied in the field of woven materials, which can solve the problems of reducing the adsorption performance of activated carbon fiber felt, secondary pollution of the environment, long preparation period, etc., and achieves excellent filtering effect, economical environment, and good mechanical properties.

Active Publication Date: 2017-02-08
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the process patent has the following defects: (1) The preparation cycle is long, and reagents such as trimethylbenzene and potassium dichromate are used in the preparation process, which will cause secondary pollution to the environment
(2) There is no adhesive between the nano-titanium dioxide and the carrier in the prepared nano-titanium dioxide/activated carbon fiber-silica, and the binding degree is poor
Patent CN 102658115 A reports a method for preparing a cerium-doped nano-titanium dioxide/activated carbon fiber composite photocatalyst for air purification, by adding nano-titanium dioxide and activated carbon fiber to a cerium

Method used

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  • Nano-TiO2/activated carbon fibrofelt three-dimensional porous material high in adsorption and photocatalytic performance, and preparation method thereof
  • Nano-TiO2/activated carbon fibrofelt three-dimensional porous material high in adsorption and photocatalytic performance, and preparation method thereof
  • Nano-TiO2/activated carbon fibrofelt three-dimensional porous material high in adsorption and photocatalytic performance, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Accurately weigh 1.10g of zinc acetate dihydrate (5mmol) into 50mL (0.65mol) of isopropanol (AR), stir at 85°C for 15min, then add 0.7mL (5mmol) of triethylamine (AR ), stirred at 85°C for 5min, and aged at room temperature for 3h to obtain a zinc oxide crystal layer solution.

[0042] (2) Activated carbon fiber felt (thickness: 1mm, specific surface area 1100m 2 / g) cut into 2cm*2cm*1mm blocks, placed in the pretreatment solution containing 5mmol / L Triton-X100, 5mmol / L citric acid monohydrate and 300mmol / L sodium hydroxide, stirred at 100°C for 1.5 h; after being washed with deionized water and ethanol respectively, dried at 60° C. for 1 hr.

[0043] (3) step (2) is pretreated and dried active carbon fiber mat is immersed in the zinc oxide crystal layer solution of step (1), soaks 5min, then upwards pulls active carbon fiber mat vertically with the speed of 1mm / s, gained product is in Dry at 60°C for 30 minutes, then repeat the above dipping and pulling process 4...

Embodiment 2

[0050] The nano-titanium dioxide / activated carbon fiber mat three-dimensional porous material obtained in embodiment 1 is carried out adsorption and photocatalytic degradation experiment of volatile organic gas toluene:

[0051] (1) Take 4 pieces of nano-titanium dioxide / activated carbon fiber felt three-dimensional porous material (mass about 0.2g) and place them at the bottom of the reaction tank. Then, inject 2 μL, 3.5 μL, and 5 μL of toluene into the reaction tank with a microsampler, respectively. Dark light adsorption was carried out at room temperature and without light for 1.5h, gas samples were collected every 1min, and online content analysis was carried out with INNOVA-1412i infrared photoacoustic chromatography.

[0052] (2) After adsorption equilibrium, turn on the ultraviolet light source (high-pressure mercury lamp, 32W) for photocatalytic degradation experiment, light for 35 hours, collect gas samples every 1 min, and use INNOVA-1412i infrared photoacoustic chr...

Embodiment 3

[0056] (1) Accurately weigh 1.10g of zinc acetate dihydrate (5mmol) into 100mL (1.31mol) of isopropanol (AR), stir at 85°C for 15min, then add 1.4mL (10mmol) of triethylamine (AR ), stirred at 85°C for 5min, and aged at room temperature for 3h to obtain a zinc oxide crystal layer solution.

[0057] (2) Cut the activated carbon fiber felt into 2cm*2cm*1mm (thickness: 1mm, specific surface area 1100m 2 / g) block, dry after pretreatment, with embodiment 1 step (2).

[0058] (3) step (2) is pretreated and dried activated carbon fiber mat is immersed in the zinc oxide crystal layer solution of step (1), soaks 2min, then upwards vertically pulls activated carbon fiber felt at a speed of 5mm / s, and the resulting product is in Dry at 80°C for 1 hour, then repeat the above dipping and pulling process 8 times, put the dried active fiber base in the oven again, and dry it again at 180°C for 4 hours, then zinc oxide crystals can be deposited on the surface of the activated carbon fiber f...

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Abstract

The invention relates to the field of materials and discloses a nano-TiO2/activated carbon fibrofelt three-dimensional porous material high in adsorption and photocatalytic performance, and a preparation method thereof. The material is of a three-dimensional porous structure and an activated carbon fibrofelt is adopted as a substrate. Meanwhile, nano-TiO2 is adhered inside the activated carbon fibrofelt. The nano-TiO2 is mainly composed of anatase and the partical size of the nano-TiO2 is 50 nm-1 mum. The preparation method comprises the following steps: (1) dipping the activated carbon fibrofelt into a zinc oxide crystal layer solution, and obtaining the activated carbon fibrofelt with a zinc oxide crystal layer deposited on the surface thereof through the dip-coating method; (2) dipping the activated carbon fibrofelt with the zinc oxide crystal layer deposited on the surface thereof into a TiO2 growth-promoting solution, and growing nano-TiO2 in situ on the surface of the zinc oxide crystal layer through the hydrothermal method. The method is simple, easy to operate, economical, applicable and environmentally-friendly. The prepared composite material is strong in adsorption performance, high in photocatalytic performance and excellent in filtering effect. Therefore, the material has a wide application prospect in the field of air purification.

Description

technical field [0001] The invention relates to the fields of woven materials, inorganic non-metallic materials, and indoor volatile organic gas (VOC) treatment, in particular to a three-dimensional porous material with high adsorption-photocatalytic performance nano-titanium dioxide / activated carbon fiber felt and a preparation method thereof. [0002] technical background [0003] With the development of the economy, the progress of society and the continuous improvement of the civilization of human life, the transformation of life makes people stay indoors longer and longer. About 70% to 92% of people's life is spent indoors, so a good indoor air environment is very important to human health. However, on the one hand, due to the energy problem and the improvement of the airtightness of the building, the fresh air volume in the building is reduced; on the other hand, the large-scale application of new building decoration materials emits some harmful gases. As a result, peo...

Claims

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Application Information

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IPC IPC(8): D06M11/44D06M11/46D06B3/10D06B15/00B01D53/86B01D53/72D06M101/40
CPCB01D53/02B01D53/8668B01D2255/802B01D2257/708B01D2259/804D06B3/10D06B15/00D06M11/44D06M11/46D06M2101/40
Inventor 郭亚平李敏柯勤飞温玺徐合
Owner SHANGHAI NORMAL UNIVERSITY
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