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Preparing method of crystalline silver loaded TiO2 nanometer particle

A nanoparticle and crystalline silver technology, which is applied in the field of preparation of crystalline silver-loaded TiO2 nanoparticles, can solve the problems of Ag particle growth, reduced dispersion, and low silver loading, and achieve improved photocatalytic activity, low operating temperature, The effect of simple equipment

Inactive Publication Date: 2013-02-06
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The chemical reduction method has a low amount of silver loading, and the dispersion of silver particles is not good; the sol-gel method is suitable for the preparation of thin films, and requires a second high-temperature treatment to obtain crystalline TiO 2 ; The silver prepared by the photoreduction deposition method is non-crystalline, and also requires secondary heat treatment, which will lead to the formation of nano-metal Ag and nano-TiO 2 The agglomeration of Ag particles, the growth of Ag particles, and the reduction of dispersion are not beneficial to the improvement of photocatalytic activity and are not conducive to large-scale production

Method used

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  • Preparing method of crystalline silver loaded TiO2 nanometer particle
  • Preparing method of crystalline silver loaded TiO2 nanometer particle
  • Preparing method of crystalline silver loaded TiO2 nanometer particle

Examples

Experimental program
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Effect test

Embodiment 1

[0016] 0.1gAgNO 3 Dissolve in 75ml of distilled water, and when completely dissolved, add 4.5ml of n-butyl titanate dropwise, and stir at room temperature for 2 hours. The solution was transferred into a 100ml autoclave, and heated in water at 160°C for 24h. After the reaction, the product was washed with distilled water, filtered with suction, and dried at 60°C for 12 hours to obtain black crystalline nano Ag-supported TiO 2 nanoparticles.

Embodiment 2

[0018] 0.4g AgNO 3 Dissolve in 75ml of distilled water, and when completely dissolved, add 4.5ml of n-butyl titanate dropwise, and stir at room temperature for 2 hours. The solution was transferred into a 100ml autoclave, and heated in water at 160°C for 24h. After the reaction, the product was washed with distilled water, filtered with suction, and dried at 60°C for 12 hours to obtain black crystalline nano Ag-supported TiO 2 nanoparticles.

Embodiment 3

[0020] 2g AgNO 3 Dissolve in 375ml of distilled water, and when completely dissolved, add 23ml of n-butyl titanate dropwise, and stir at room temperature for 2 hours. The solution was transferred into a 500ml autoclave, and heated with water at 160°C for 48h. After the reaction, the product was washed with distilled water, filtered with suction, and dried at 60°C for 12 hours to obtain black crystalline nano Ag-supported TiO 2 nanoparticles.

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Abstract

The invention relates to a TiO2 nanometer particle, in particular to a preparing method of a crystalline silver loaded TiO2 nanometer particle. The preparing method needs no additives such as absolute ethyl alcohol and acetoacetic acid ethyl, completes particle preparing directly in aqueous solutions, and is favorable for large-scale industrial production. The preparing method is characterized in that AgNO3 is dissolved in water, filled with titanium tetrabutoxide after being completely dissolved, moved into an autoclave, subjected to hydrothermal reaction, washed, leached and dried to obtain the black crystalline silver loaded TiO2 nanometer particle. The crystalline silver loaded TiO2 nanometer particle is obtained by preparing inorganic raw materials in aqueous solutions, and is low in cost and operation temperature, simple in device, free of pollution and favorable for enlarging industrial production.

Description

technical field [0001] The present invention relates to a kind of TiO 2 nanoparticles, especially involving a crystalline silver-supported TiO 2 Preparation method of nanoparticles. Background technique [0002] Nano-titanium dioxide has many unique properties, so it is widely used in various technical fields. In the case of light, nano-titanium dioxide produces strong oxidation ability and super-hydrophilic properties, which can be used in the fields of air purification, sewage treatment, solar energy utilization, antibacterial, antivirus and self-cleaning. In order to improve the shortcomings of titanium dioxide such as low photon utilization rate, rapid recombination of photogenerated electron-hole pairs, and poor selectivity, nano-silver particles are loaded on titanium dioxide, which can effectively prevent the recombination of photogenerated electron-hole pairs and improve the photocatalytic activity of titanium dioxide. At the same time, it has sterilization effect...

Claims

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Application Information

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IPC IPC(8): B01J23/50
Inventor 周忠华王笛吴玉萍黄悦
Owner XIAMEN UNIV
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