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Method for preparing anatase nano Ag/TiO2 composite material

An anatase type, composite material technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of high production cost, complicated process, complicated and difficult to control process, and achieve The effect of reduced production cost, simple process, strong catalytic activity and bactericidal performance

Active Publication Date: 2012-05-23
山东兴辰铝业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The hydrolysis process in the preparation consumes a large amount of acid, and the continuous hydrolysis method also needs to dissolve metatitanic acid at 125°C, the process operation is complicated and difficult to control, and the production cost is high
[0004] At present, there are many patents on the preparation of nano-titanium dioxide, but most of them have complicated processes

Method used

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  • Method for preparing anatase nano Ag/TiO2 composite material
  • Method for preparing anatase nano Ag/TiO2 composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) Take 20ml mass percent of 25% concentrated ammonia in a beaker, mix AgNO with 1% doping amount 3 Add concentrated ammonia water, seal the mouth of the cup with plastic wrap, heat and stir on a magnetic stirrer to make AgNO 3 completely dissolved;

[0017] 2) When the solution obtained in step 1) is heated until the remaining amount is 15ml, add 5ml of C 16 h 36 o 4 Ti, continue stirring and heating, the solution gradually becomes milky white opaque solution;

[0018] 3) Remove the plastic wrap, continue stirring and heating until the solution is evaporated to dryness, and a white solid is obtained;

[0019] 4) Place the white solid together with the beaker in an oven at 100°C for 30 minutes and then grind it finely to obtain a powder;

[0020] 5) Sinter the above powder in a muffle furnace at 200°C for 2 hours to remove nitrogen-containing substances and water remaining in the crystal, and then sinter in a muffle furnace at 550°C for 3 hours to further crystalli...

Embodiment 2

[0022] 1) Get 20ml of concentrated ammonia water with a mass percentage of 25% in a beaker, and mix AgNO with a doping amount of 3%. 3 Add concentrated ammonia water, seal the mouth of the cup with plastic wrap, heat and stir on a magnetic stirrer to make AgNO 3 completely dissolved;

[0023] 2) When the solution obtained in step 1) is heated until the remaining amount is 15ml, add 5ml of C 16 h 36 o 4 Ti, continue stirring and heating, the solution gradually becomes milky white opaque solution;

[0024] 3) Remove the plastic wrap, continue stirring and heating until the solution is evaporated to dryness, and a white solid is obtained;

[0025] 4) Place the white solid together with the beaker in an oven at 100°C for 50 minutes and then grind it finely to obtain a powder;

[0026] 5) Sinter the above powder in a muffle furnace at 200°C for 2 hours to remove nitrogen-containing substances and water remaining in the crystal, and then sinter in a muffle furnace at 550°C for ...

Embodiment 3

[0028] 1) Take 20ml mass percent of 25% concentrated ammonia in a beaker, and mix AgNO with 5% doping amount 3 Add concentrated ammonia water, seal the mouth of the cup with plastic wrap, heat and stir on a magnetic stirrer to make AgNO 3 completely dissolved;

[0029] 2) When the solution obtained in step 1) is heated until the remaining amount is 15ml, add 5ml of C 16 h 36 o 4Ti, continue stirring and heating, the solution gradually becomes milky white opaque solution;

[0030] 3) Remove the plastic wrap, continue stirring and heating until the solution is evaporated to dryness, and a white solid is obtained;

[0031] 4) Place the white solid together with the beaker in an oven at 100°C for 40 minutes and then grind it finely to obtain a powder;

[0032] 5) Sinter the above powder in a muffle furnace at 200°C for 2 hours to remove nitrogen-containing substances and water remaining in the crystal, and then sinter in a muffle furnace at 550°C for 3 hours to further crysta...

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Abstract

The invention relates to a method for preparing an anatase nano Ag / TiO2 composite material, which comprises the steps of: adding AgNO3 in stronger ammonia water, sealing a cup opening by using a preservative film, heating and stirring on a magnetic stirrer to ensure that the AgNO3 is fully dissolved, then adding C16H36O4Ti, and continuously stirring and heating to ensure that a solution gradually changes into an opaque milky solution; continuously stirring and heating until the solution is dried up to obtain white solid; and placing the white solid together with a beaker into a drying oven to be dried, and grinding into powder; and sintering the powder in a muffle furnace to obtain an anatase nano TiO2 crystal. Silver is loaded in a nano TiO2 solution, and is mixed more uniformly compared with the traditional method; a contact area of the silver and titanium dioxide is larger compared with the traditional method, the silver loading is not only carried out on the surface but also carried out in all nano titanium dioxide particles so that the oxidization discoloration degree of the silver is lowered, therefore, the method is very beneficial to the obtaining of the nano Ag / TiO2 withvery uniform dispersion of the silver, lower decoloration degree and strong catalysis activity and sterilizing property.

Description

technical field [0001] The present invention relates to a kind of nano TiO 2 The preparation method of composite material, be specifically related to a kind of anatase type nano Ag / TiO 2 Methods for the preparation of composite materials. Background technique [0002] Anatase TiO 2 It is a material with photocatalytic properties. It uses sunlight and ultraviolet light in fluorescent lamps as the excitation source to have photocatalytic and antibacterial effects such as air purification, sewage treatment, and self-cleaning, and the effect is long-lasting. The premise of its realization is the excitation of ultraviolet light. Therefore, in the absence of ultraviolet light, even the anatase phase TiO 2 There is also no photocatalytic effect, and the anatase phase of TiO 2 Nano silver-loaded titanium dioxide composite material (Ag / TiO 2 ) Due to the presence of silver ions with strong antibacterial properties, it also has strong antibacterial and oxidative properties when t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/50B01J37/00
Inventor 杨辉张璐璐代春吉
Owner 山东兴辰铝业科技有限公司
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