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Recyclable flexible titanium dioxide/pyrolytic carbon/carbon fiber felt composite photocatalytic material as well as preparation method and application thereof

A technology of composite photocatalysis and carbon fiber mat, which is applied in the field of photocatalysis materials, can solve the problems of low solar energy utilization and difficult recycling, and achieve the effects of reducing electron-hole recombination, low cost, and promoting uniform growth

Pending Publication Date: 2021-10-22
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a recyclable flexible titanium dioxide / pyrolytic carbon / carbon fiber mat composite photocatalytic material and its preparation method and application, which solves the problem of TiO2-based traditional powder photocatalytic in the prior art. Catalysts have low utilization of solar energy and are not easy to recycle

Method used

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  • Recyclable flexible titanium dioxide/pyrolytic carbon/carbon fiber felt composite photocatalytic material as well as preparation method and application thereof
  • Recyclable flexible titanium dioxide/pyrolytic carbon/carbon fiber felt composite photocatalytic material as well as preparation method and application thereof
  • Recyclable flexible titanium dioxide/pyrolytic carbon/carbon fiber felt composite photocatalytic material as well as preparation method and application thereof

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preparation example Construction

[0027] The invention discloses a recyclable flexible titanium dioxide (TiO 2 ) / pyrolytic carbon / carbon fiber felt composite photocatalytic material preparation method, comprising the following steps: first soak the carbon fiber felt in acetone for pretreatment, obtain a clean carbon fiber felt after drying, put the gained clean carbon fiber felt into a CVD tube In the furnace, pyrolytic carbon is deposited at high temperature by feeding methane and argon to obtain pyrolytic carbon / carbon fiber felt. A certain amount of tetrabutyl titanate is added to the mixed solution of acetone and ethylene glycol, and pyrolytic carbon / carbon fiber felt is The carbon fiber felt is added to the reactor lined with polytetrafluoroethylene, and the recyclable flexible TiO is obtained after cleaning and drying. 2 / pyrolytic carbon / carbon fiber felt composite photocatalytic material. Specific steps are as follows:

[0028] Step 1: Soak the carbon fiber felt in acetone for 12 hours and dry to obt...

Embodiment 1

[0040] (1) Soak the carbon fiber felt in acetone for 12 hours, remove some impurities on the surface, and dry to obtain a clean carbon fiber felt.

[0041] (2) Put the clean carbon fiber felt pretreated with acetone into a CVD tube furnace, flow argon at 150-300mL / min and heat it at 8°C per minute to 1000°C in an argon atmosphere.

[0042] (3) When the furnace is kept warm, feed methane at a flow rate of 50-100mL / min to form a mixed gas of methane: argon at a ratio of 1:3 and feed methane and argon at a temperature of 1000°C for 10 minutes, then cool down naturally. A pyrolytic carbon / carbon fiber felt is obtained.

[0043] (4) Add ethylene glycol, acetone, and tetrabutyl titanate into a beaker at a volume ratio of 20:10:1, and stir for 30 minutes to obtain a prepared solution.

[0044] (5) Put the pyrolytic carbon / carbon fiber mat obtained in step (3) and the solution prepared in step (4) into a polytetrafluoroethylene reactor for hydrothermal reaction, react at 150°C for 16...

Embodiment 2

[0047] (1) Soak the carbon fiber felt in acetone for 12 hours, remove some impurities on the surface, and dry to obtain a clean carbon fiber felt.

[0048] (2) Put the clean carbon fiber felt pretreated with acetone into a CVD tube furnace, flow argon at 150-300mL / min, and heat it at 9°C to 1100°C per minute in an argon atmosphere.

[0049] (3) When the furnace is kept warm, feed methane at a flow rate of 50-100mL / min to form a mixed gas of methane: argon at a ratio of 1:3, and deposit at 1000°C for 20 minutes, then cool down naturally. A pyrolytic carbon / carbon fiber felt is obtained.

[0050] (4) Add ethylene glycol, acetone, and tetrabutyl titanate into a beaker at a volume ratio of 20:10:1, and stir for 30 minutes to obtain a prepared solution.

[0051] (5) Put the pyrolytic carbon / carbon fiber mat obtained in step (3) and the prepared solution in step (4) into a polytetrafluoroethylene reactor for hydrothermal reaction, react at 160°C for 12 hours, and collect the produc...

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Abstract

The invention discloses a recyclable flexible titanium dioxide / pyrolytic carbon / carbon fiber felt composite photocatalytic material as well as a preparation method and application thereof, and relates to the field of photocatalytic materials. The preparation method comprises the steps: soaking a carbon fiber felt in acetone, and drying to obtain a clean carbon fiber felt; heating the clean carbon fiber felt in an inert atmosphere, and depositing pyrolytic carbon at a high temperature in a methane atmosphere to obtain a pyrolytic carbon / carbon fiber felt; and evenly mixing acetone, ethylene glycol and tetrabutyl titanate to obtain a mixed solution, mixing the obtained pyrolytic carbon / carbon fiber felt and the obtained mixed solution for a hydrothermal reaction, cleaning and drying an obtained product after the reaction is finished, and preparing the recoverable flexible titanium dioxide / pyrolytic carbon / carbon fiber felt composite photocatalytic material. The problems that in the prior art, a TiO2-based traditional powder photocatalyst is low in solar energy utilization rate and not easy to recycle are effectively solved.

Description

technical field [0001] The invention relates to the field of photocatalytic materials, in particular to a recyclable flexible titanium dioxide / pyrolytic carbon / carbon fiber mat composite photocatalytic material and its preparation method and application. Background technique [0002] With the rapid development of productivity, large-scale industrial production processes will produce a large amount of industrial wastewater. The discharge of these wastewater will not only pollute the ecological environment, but also cause great harm to human health. It must be treated before it can be discharged. Traditional industrial wastewater treatment methods mainly include physical methods, chemical methods and biological methods, which have the disadvantages of limited treatment capacity and high treatment costs. [0003] In recent years, photocatalytic oxidation technology has been widely used in the treatment of industrial wastewater. TiO 2 It has the advantages of strong oxidative ...

Claims

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Application Information

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IPC IPC(8): B01J21/18B01J35/06B01J37/10C02F1/30C02F1/72C02F101/38C02F101/36C02F101/34
CPCB01J21/18B01J37/10C02F1/30C02F1/725C02F2305/10C02F2101/38C02F2101/36C02F2101/34B01J35/39B01J35/58
Inventor 杨艳玲刘佳隽陈华军锁国权冯雷叶晓慧侯小江和茹梅薛帆张荔
Owner SHAANXI UNIV OF SCI & TECH
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