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Preparation method of titanium dioxide photocatalysis composite material

A technology of photocatalytic materials and composite materials, which is applied in the field of preparation of titanium dioxide photocatalytic composite materials, can solve problems such as separation, difficulty in particles, and easy agglomeration, and achieve the effects of easy separation and recovery, improved efficiency, and large specific surface area

Inactive Publication Date: 2018-11-16
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But TiO 2 Nanoparticles are prone to agglomeration due to their large surface energy, and the smaller particles are difficult to separate from sewage

Method used

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  • Preparation method of titanium dioxide photocatalysis composite material
  • Preparation method of titanium dioxide photocatalysis composite material

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specific Embodiment approach 1

[0011] Specific implementation method 1: 1. After drying, 300-mesh activated carbon is refluxed in sulfuric acid at 90°C for 2 hours, and after repeated washing, it is moved into a vacuum drying oven for drying treatment at 200°C for 12 to discharge adsorbed gas and other impurities; 2. Use solvothermal To synthesize ferrimagnetic ferrite / activated carbon, weigh two kinds of soluble metal salts (the atomic ratio of divalent metal ion (Co) to ferric salt is 1:2) in diethylene glycol solution according to a certain ratio, After stirring in an 80°C oil bath for 2 hours, add diethanolamine (1:6 volume ratio to diethylene glycol) dropwise, and then gradually add NaOH (10:1 molar ratio to ferrite) diethylene glycol solution and activated carbon (The molar ratio of ferrite to activated carbon is 1:100) diethylene glycol solution, uniformly mix the above liquid, solvent heat treatment at 200 for 8 hours, wash and dry after magnetic separation; 3. Titanic acid with a mass ratio of 1:1 ...

specific Embodiment approach 2

[0012] Specific implementation method two: 1. After drying, 400 mesh activated carbon is refluxed in sulfuric acid at 70°C for 2 hours, and after repeated washing, it is moved into a vacuum drying oven at 150°C for drying treatment for 24 hours, and the adsorbed gas and other impurities are discharged; 2. Using a solvent Thermally synthesize ferrimagnetic ferrite / activated carbon, weigh two kinds of soluble metal salts according to a certain ratio (the atomic ratio of divalent metal ion (Ni) to ferric salt is 1:2) and add them to the diethylene glycol solution , after stirring in an oil bath at 100°C for 0.5h, dropwise add diethanolamine (1:10 volume ratio to diethylene glycol), and then gradually add NaOH (15:1 molar ratio to ferrite) diethylene glycol solution and activated carbon (the molar ratio of ferrite to activated carbon is 1:100) diethylene glycol solution, mix the above liquid evenly and heat-treat the above liquid at 250°C for 6 hours, wash and dry after magnetic se...

specific Embodiment approach 3

[0013] Specific implementation method three: 1. After drying, 300 mesh activated carbon is refluxed in 80°C sulfuric acid for 3 hours, and after repeated washing, it is moved into a vacuum drying oven for 180°C drying treatment for 18 hours, and the adsorbed gas and other impurities are discharged; 2. The solvent is used Thermally synthesize ferrimagnetic ferrite / activated carbon, weigh two soluble metal salts according to a certain ratio (the atomic ratio of divalent metal ion (Fe) to ferric salt is 1:2) and add them to the diethylene glycol solution After stirring in an oil bath at 90°C for 1 hour, add diethanolamine dropwise (1:8 volume ratio to diethylene glycol), and then gradually add NaOH (12:1 molar ratio to ferrite) in diethylene glycol solution Diethylene glycol solution with activated carbon (the molar ratio of ferrite to activated carbon is 1:100), uniformly mix the above liquid, solvent heat treatment at 220°C for 7 hours, wash and dry after magnetic separation; 3....

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Abstract

The invention relates to a preparation method of a porous recyclable ferromagnetic ferrite / titanium dioxide (TiO2) photocatalysis composite material. The material takes an active carbon template and apore-forming agent and is prepared through modification, magnetic medium filling, titanium dioxide loading and template removal, and has the advantages of high photocatalysis efficiency and good magnetic separation efficiency. The preparation method comprises the following steps: 1) nitric acid backflow modification of active carbon; 2) a solvothermal method is employed for appropriate filling ofa ferrite magnetic medium on the modified active carbon to obtain a ferrite / active carbon composite material having magnetic responsiveness; 3) an immersion method is employed for loading TiO2 nano particles by taking butyl titanate as a precursor to obtain a TiO2 / ferrite / active carbon composite material; and 4) the TiO2 / ferrite / active carbon composite material is calcined in air to obtain the porous recyclable ferromagnetic ferrite / titanium dioxide photocatalysis composite material with easy magnetic separation. The titanium dioxide photocatalysis composite material has the advantages of simple preparation technology, cycle utilization, and high catalysis efficiency.

Description

technical field [0001] The invention relates to a recyclable high specific surface area titanium dioxide (TiO 2 ) preparation method of photocatalytic composite material, the synthesized material has excellent photocatalytic performance and is easy to separate. Background technique [0002] Fossil energy such as petroleum, coal, and natural gas not only has limited reserves and is unsustainable, but also produces pollution to water, air, and soil after combustion, which in turn endangers organisms around the world. Therefore, it is imminent to explore clean and sustainable alternative energy sources. In addition to the energy crisis, environmental pollution is another major problem facing mankind. Among them, air pollution has caused millions of people to lose their lives, and the number of people suffering from diseases is even more numerous; while water pollution not only destroys the water ecological environment, but also seriously endangers human health. [0003] Since...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J23/745B01J23/75B01J35/10B01J37/08B82Y30/00B82Y40/00C02F1/32C02F101/30
CPCB82Y30/00B82Y40/00C02F1/32B01J21/063B01J23/745B01J23/75B01J37/0018B01J37/082C02F2101/30C02F2305/10B01J35/617B01J35/39
Inventor 王新庆毛佳楠王攀峰徐靖才金顶峰彭晓领洪波金红晓葛洪良
Owner CHINA JILIANG UNIV
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