Method for preparing metal doped TiO2 nanocrystal particles

A nanocrystalline particle, metal doping technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problem of high photogenerated carrier recombination rate and effective The problems of less utilization and low quantum efficiency can achieve the effect of good suspension performance, relatively low production cost and high photocatalytic efficiency

Inactive Publication Date: 2014-12-10
李建明
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In sunlight, the energy in the ultraviolet band is less, and at the same time, due to the high recombination rate of photogenerated carriers and the low quantum efficiency, the actual effective use is even less.

Method used

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  • Method for preparing metal doped TiO2 nanocrystal particles
  • Method for preparing metal doped TiO2 nanocrystal particles
  • Method for preparing metal doped TiO2 nanocrystal particles

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Under stirring conditions, 2.5 grams of titanium sulfate were dispersed and dissolved in 100 milliliters of copper chloride aqueous solution with a copper ion concentration of 0.1%. Slowly add tetramethylammonium hydroxide with a concentration of 0.1 moles per liter to the above solution until the solution is neutral (pH value is about 7), so that titanium sulfate is gradually hydrolyzed to form copper ion-doped hydrated titanic acid precipitate. The hydrated titanic acid precipitate doped with copper ions was ultrasonically dispersed, washed with deionized water several times, and centrifuged. Next, prepare 200 milliliters of hydrogen peroxide volume fractions and be the hydrogen peroxide aqueous solution of 3%. Subsequently, ultrasonically disperse the above-mentioned washed copper ion-doped hydrated titanic acid precipitate in the above-mentioned hydrogen peroxide aqueous solution with a hydrogen peroxide volume fraction of 3%, and after stirring for 1 hour, hydrothe...

Embodiment 2

[0049] Under the condition of stirring, 2.5 g of titanyl sulfate was dispersed and dissolved in 100 ml of ferric nitrate aqueous solution with an iron ion concentration of 0.5%. Slowly add ammonia water with a concentration of 0.2 moles per liter into the above solution until the solution is neutral (pH value is about 7), so that titanyl sulfate is gradually hydrolyzed to form iron ion-doped hydrated titanic acid precipitates. The hydrated titanic acid precipitate doped with iron ions was ultrasonically dispersed, washed with deionized water several times, and centrifuged. Next, prepare 200 milliliters of hydrogen peroxide volume fractions and be the hydrogen peroxide aqueous solution of 5%. Subsequently, ultrasonically disperse the washed iron ion-doped hydrated titanic acid precipitate in the hydrogen peroxide aqueous solution with a hydrogen peroxide volume fraction of 5% and stir for 2 hours, then hydrothermally react at 100 degrees Celsius for 8 hours to obtain Figure 4...

Embodiment 3

[0051] Under the condition of stirring, 3 milliliters of titanium tetrachloride were dispersed and dissolved in 100 milliliters of chloroplatinic acid aqueous solution with a platinum ion concentration of 0.2%. Slowly add tetrabutylammonium hydroxide with a concentration of 0.1 mole per liter into the above solution until the solution is neutral (pH value is about 7), so that titanium tetrachloride is gradually hydrolyzed to form platinum ion-doped hydrated titanic acid precipitate. The hydrated titanic acid precipitate doped with platinum ions was ultrasonically dispersed, washed several times with deionized water, and centrifuged. Secondly, prepare 200 milliliters of hydrogen peroxide aqueous solution that the volume fraction of hydrogen peroxide is 2%. Subsequently, the above-mentioned washed platinum ion-doped hydrated titanic acid precipitate was ultrasonically dispersed in the above-mentioned hydrogen peroxide aqueous solution with a hydrogen peroxide volume fraction of ...

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Abstract

The invention discloses a method for preparing metal doped TiO2 nanocrystal particles. The method comprises the following steps: dispersing a titanium source in a metal ion aqueous solution, hydrolyzing to obtain metal ion doped hydrated titanic acid precipitation, dispersing the metal ion doped hydrated titanic acid precipitation in a hydrogen peroxide aqueous solution, and hydrothermally reacting to obtain the metal doped TiO2 nanocrystal particles. The method for preparing the metal doped TiO2 nanocrystal particles, which is disclosed by the invention, can be used for preparing metal doped monodisperse and suspended TiO2 nanocrystal particles with visible-light activity, and the method has a good application prospect in the fields of photocatalytic air purification, photocatalytic water treatment and the like.

Description

technical field [0001] The invention relates to the field of preparation of functional photocatalyst materials, in particular to a method for preparing TiO with visible light activity 2 Nanocrystalline particle method. Background technique [0002] Titanium dioxide (TiO 2 ) is considered to be one of the most ideal photocatalytic materials and has been widely used in photocatalytic air purification and photocatalytic water treatment. TiO 2 The photocatalytic efficiency of a particle is closely related to its size, shape, degree of dispersion, crystallinity, etc. Generally speaking, a small particle size has a large specific surface area, can absorb more organic matter, and usually shows a higher photocatalytic efficiency; Similarly, the greater the degree of dispersion of particles, the more conducive to the improvement of photocatalytic efficiency. [0003] At present, although there are studies on the controllable synthesis of TiO 2 Nanoparticle research reports, but ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/50B01J23/52B01J23/42B01J23/44B01J23/46B01J23/72B01J23/745B01J23/75B01J23/755B01J23/34B01J23/22B01J23/26B01J23/20B01J23/10
Inventor 李建明
Owner 李建明
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