Preparation method for {100} crystal plane anatase TiO2 nano-particles

A technology of anatase phase and nanoparticle, which is applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of few reports on the synthesis of nanoparticle, and achieve good dispersion and optical properties. High catalytic efficiency and high photocatalytic activity

Active Publication Date: 2014-10-15
NINGBO NANOJP NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, regarding the anatase phase TiO exposing a large number of highly active {100} facets 2 The synthesis of nanoparticles is rarely reported

Method used

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  • Preparation method for {100} crystal plane anatase TiO2 nano-particles
  • Preparation method for {100} crystal plane anatase TiO2 nano-particles
  • Preparation method for {100} crystal plane anatase TiO2 nano-particles

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Under the condition of stirring, 2.5 g of titanium sulfate was dispersed and dissolved in 100 ml of deionized water. 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 hydrated TiO 2 precipitation. hydrated TiO 2 Ultrasonic dispersion of precipitation, washing with deionized water several times, and centrifugation to obtain high-purity (purity above 97%) hydrated TiO 2 precipitation. Next, prepare 200 milliliters of hydrogen peroxide solution with a hydrogen peroxide volume fraction of 2%, and add dilute ammonia water to adjust it to form an alkaline hydrogen peroxide solution with a pH value of 10.5. Subsequently, the above-mentioned washed high-purity hydrated TiO 2 The precipitate was ultrasonically dispersed in the above-mentioned alkaline hydrogen peroxide solution with a pH value of 10.5 and a hyd...

Embodiment 2

[0048] Under the condition of stirring, 2.5 g of titanium sulfate was dispersed and dissolved in 100 ml of deionized water. 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 hydrated TiO 2 precipitation. hydrated TiO 2 Ultrasonic dispersion of precipitation, washing with deionized water several times to obtain high-purity hydrated TiO 2 Precipitation and centrifugation to obtain high-purity hydrated TiO 2 precipitation. Next, prepare 200 milliliters of hydrogen peroxide solution with a hydrogen peroxide volume fraction of 2%, and add dilute ammonia to adjust it to form an alkaline hydrogen peroxide solution with a pH value of 8.5. Subsequently, the hydrated TiO with a purity of more than 97% after the above washing 2 The precipitate was ultrasonically dispersed in the above-mentioned alkaline hydrogen peroxi...

Embodiment 3

[0050] Under the condition of stirring, 5 g of titanium sulfate was dispersed and dissolved in 100 ml of deionized water. Slowly add ammonia water with a concentration of 0.2 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 hydrated TiO 2 precipitation. hydrated TiO 2 Precipitation ultrasonic dispersion, washed with deionized water several times to obtain hydrated TiO with a purity of more than 97% 2 Precipitation, centrifugation. Next, prepare 200 milliliters of hydrogen peroxide solution with a hydrogen peroxide volume fraction of 5%, and add dilute tetramethylammonium hydroxide to adjust it to an alkaline hydrogen peroxide solution with a pH value of 9. Subsequently, the hydrated TiO with a purity of more than 97% after washing 2 The precipitate was stirred and dispersed in the above alkaline hydrogen peroxide solution with a pH value of 9 and a volume fraction of hydrogen...

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Abstract

The application of the invention discloses a preparation method for {100} crystal plane anatase TiO2 nano-particles. The preparation method comprises the following steps: performing hydration reaction on a titanium source to obtain hydrated TiO2 precipitation, and dispersing the hydrated TiO2 precipitation into an alkaline hydrogen peroxide solution for realizing a hydrothermal reaction so as to obtain the exposed active {100} crystal plane anatase TiO2 nano-particles, wherein the pH value of the alkaline hydrogen peroxide solution is 8-13. By the adoption of the preparation method for the {100} crystal plane anatase TiO2 nano-particles, the exposed active {100} crystal plane anatase TiO2 nano-particles of which particle sizes are less than 15 nanometers can be prepared.

Description

technical field [0001] The invention relates to the field of preparation of functional photocatalyst materials, in particular to a method for preparing {100} crystal plane anatase phase TiO 2 nanoparticle approach. Background technique [0002] Titanium dioxide (TiO 2 ) has attracted extensive attention from industry and scientific research circles due to its rich sources, non-toxicity, and good stability. Recently, anatase TiO 2 Considered as one of the most ideal photocatalytic materials, it is widely used in photocatalytic air purification and photocatalytic water treatment. [0003] Anatase phase TiO 2 The photocatalytic efficiency is closely related to its size, morphology, exposed crystal plane, degree of dispersion, crystallinity, etc. Generally speaking, small particle size has a large specific surface area, which can absorb more organic matter and show higher photocatalytic efficiency. Catalytic efficiency; similarly, the greater the degree of dispersion of par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/047B82Y30/00B82Y40/00B01J21/06
Inventor 李建明
Owner NINGBO NANOJP NEW MATERIAL TECH CO LTD
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