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Preparation method of nanometer silver-loaded titanic oxide photocatalyst

A technology of titanium dioxide and photocatalyst, which is applied in the field of photocatalyst preparation, can solve the problems of unstable storage and poor dispersion, and achieve the effects of stable storage, good dispersion and strong photocatalytic performance

Active Publication Date: 2015-05-06
陈志朋
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Problems solved by technology

[0004]The existing silver-titanium composite nanoparticle manufacturing technology mostly uses silver ions to form doping with titanium dioxide to make titanium dioxide photocatalyst. This titanium dioxide photocatalyst There are technical problems of poor dispersion and unstable storage

Method used

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  • Preparation method of nanometer silver-loaded titanic oxide photocatalyst
  • Preparation method of nanometer silver-loaded titanic oxide photocatalyst

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Embodiment 1

[0019] The preparation method of nano-silver supported titanium dioxide photocatalyst of the present invention is as follows:

[0020] Put 20 grams of hydrogen peroxide and 2.5 grams of sodium hydroxide into a small high-pressure reaction kettle cooled by ice water circulation, and slowly add 20 grams of titanium tetrachloride after dissolving, heat and pressurize to 115-150°C with sealing, keep warm for 5 hours, and the material Enter into the reflux pipe and cool and reflux for 15 hours to prepare the titanium dioxide nanocrystalline hydrosol for subsequent use;

[0021] Add 0.017g of silver nitrate to 10ml of absolute ethanol, stir until it is completely dissolved, then drop it dropwise into 20ml of ethanol containing 0.10g of polyvinylpyrrolidone, and then transfer the mixed solution to a total volume of Put a 40ml polytetrafluoroethylene-lined autoclave in an oven at 180°C for 24 hours, cool down to room temperature naturally, and centrifuge to separate the product. , an...

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Abstract

The invention discloses a preparation method of a photocatalyst, and particularly relates to a preparation method of nanometer silver-loaded titanic oxide photocatalyst. The preparation method comprises the following steps: putting 20g of hydrogen peroxide and 2.5g of sodium hydroxide into a reaction kettle; after dissolving, slowly adding 20g of titanium tetrachloride; heating and pressurizing under sealing, preserving heat, cooling and refluxing to prepare a titanium dioxide nanocrystalline hydrosol for later use; adding 0.017g of silver nitrate into 10ml of absolute ethyl alcohol and then adding into 20ml of ethanol with 0.10g of polyvinylpyrrolidone, and reacting to obtain spherical nanometer silver for later use; reacting 0.01g of the prepared spherical nanometer silver with 10g of the prepared titanium dioxide nanocrystalline hydrosol and further carrying out ultrasonic dispersion for 30 minutes to prepare a photocatalyst. The photocatalyst prepared by the invention is characterized by good dispersibility, stable storage and stronger photocatalytic performance compared with that of nanometer titanium dioxide simultaneously when reserving the antibacterial property and other properties of nanometer silver.

Description

technical field [0001] The invention relates to a preparation method of a photocatalyst, in particular to a preparation method of a nano-silver supported titanium dioxide photocatalyst. Background technique [0002] Photocatalytic purification is based on the redox ability of photocatalysts under ultraviolet irradiation to purify pollutants. The use of photocatalysts to purify and remove organic pollutants in the air has mild reaction conditions, and organic pollutants can be decomposed into small inorganic molecules such as carbon dioxide and water. There is adsorption saturation phenomenon, long service life. [0003] Photocatalyst purification has the characteristics of small secondary pollution and low operating cost. It can use sunlight as the reaction light source, so photocatalysis is especially suitable for the purification of indoor volatile organic compounds, and it has shown great application potential in deep purification. Common photocatalysts are mostly metal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/50
Inventor 陈志朋
Owner 陈志朋
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