Preparation method of monodisperse smooth surface amorphous titania nanospheres

A smooth surface, titanium dioxide technology, applied in the direction of titanium dioxide, nanotechnology for materials and surface science, titanium oxide/hydroxide, etc. Scientific method, low price, mild effect

Active Publication Date: 2015-08-12
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are shortcomings in this preparation method. First, the liquid butyl titanate as one of the raw materials is not only expensive, but also unfavorable for industrial use and transportation; The calcination process is energy-consuming and time-consuming; thirdly, the particle size range of the obtained product is narrow, which restricts the application occasions and fields; finally, although the obtained product has many uses, it is difficult to use it as a matting material. sunscreen

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  • Preparation method of monodisperse smooth surface amorphous titania nanospheres
  • Preparation method of monodisperse smooth surface amorphous titania nanospheres
  • Preparation method of monodisperse smooth surface amorphous titania nanospheres

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Embodiment 1

[0020] The concrete steps of preparation are:

[0021] In step 1, the titanium nitride powder is dissolved in water at a weight ratio of 0.4:130 and then stirred for 0.5 h; wherein, the water is deionized water to obtain an aqueous solution of titanium nitride. Then add hydrogen peroxide with a concentration of 25% and ammonia with a concentration of 28% to the titanium nitride aqueous solution in turn, and stir for 1 h; wherein, the volume ratio of the titanium nitride aqueous solution, hydrogen peroxide and ammonia is 110.4:18:14, and the precursor is obtained solution.

[0022] In step 2, first mix the precursor solution and ethanol according to the volume ratio of 2:8, and then stir for 0.5 h to obtain a microemulsion solution. Then the microemulsion solution was heated at 60° C. for 20 h to obtain a white precipitate.

[0023] Step 3, wash the white precipitate with ethanol, and then dry it at 55°C for 28 hours to obtain the following figure 1 d, and as figure 2 and ...

Embodiment 2

[0025] The concrete steps of preparation are:

[0026] Step 1: First, according to the weight ratio of 0.45:125, the titanium nitride powder is dissolved in water and then stirred for 0.6h; wherein, the water is distilled water to obtain a titanium nitride aqueous solution. Then add hydrogen peroxide with a concentration of 28% and ammonia with a concentration of 27% to the titanium nitride aqueous solution in sequence, and stir for 1.5 hours; wherein, the volume ratio of the titanium nitride aqueous solution, hydrogen peroxide and ammonia is 115:17:15, and the precursor body solution.

[0027] In step 2, the precursor solution and ethanol are mixed according to the volume ratio of 3:7, and then stirred for 0.6 h to obtain a microemulsion solution. Then the microemulsion solution was heated at 65° C. for 16 h to obtain a white precipitate.

[0028] Step 3, wash the white precipitate with ethanol, and then dry it at 58°C for 27 hours to obtain the following figure 1 as shown...

Embodiment 3

[0030] The concrete steps of preparation are:

[0031] In step 1, the titanium nitride powder is dissolved in water at a weight ratio of 0.5:120 and then stirred for 0.7 hours; wherein, the water is deionized water to obtain an aqueous solution of titanium nitride. Then add hydrogen peroxide with a concentration of 30% and ammonia with a concentration of 27% to the titanium nitride aqueous solution in turn, and stir for 2 hours; wherein, the volume ratio of the titanium nitride aqueous solution, hydrogen peroxide and ammonia is 120:16:16, and the precursor is obtained solution.

[0032] In step 2, the precursor solution and ethanol are mixed according to the volume ratio of 4:6, and then stirred for 0.7 h to obtain a microemulsion solution. Then the microemulsion solution was heated at 70° C. for 16 h to obtain a white precipitate.

[0033]Step 3, wash the white precipitate with ethanol, and then dry it at 60°C for 26 hours to obtain the following figure 1 as shown in b, an...

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Abstract

The invention discloses a preparation method for a monodisperse smooth surface amorphous titanium dioxide nanosphere. By adopting a solution process, the method comprises the steps of: firstly dissolving titanium nitride powder in water and conducting stirring to obtain a titanium nitride aqueous solution, then adding hydrogen peroxide and ammonia water into the titanium nitride aqueous solution in order, and performing stirring for at least 1h, thus obtaining a precursor solution; then, mixing the precursor solution with ethanol and conducting stirring to obtain a microemulsion solution, then heating the microemulsion solution at 60-80DEG C for at least 12h to obtain a white precipitate; and then, firstly using ethanol to washing the white precipitate, and then drying the precipitate at 55-65DEG C for at least 24h, thus obtaining the monodisperse smooth surface amorphous titanium dioxide nanosphere with a diameter of 150-800nm. The method provided by the invention is a microemulsion solution method without the need of using any template as a structure-directing agent, has the advantages of mild synthesis conditions, no toxicity, no pollution and low price, belongs to a green and environment friendly low temperature synthesis method, and is very conducive to industrial production and commercial application of the prepared target product.

Description

technical field [0001] The invention relates to a method for preparing titanium dioxide nanospheres, in particular to a method for preparing monodisperse and smooth surface amorphous titanium dioxide nanospheres. Background technique [0002] Titanium dioxide is a wide-bandgap semiconductor material widely used. It has good stability, is non-toxic to the human body, and has moisture sensitivity, pressure sensitivity and gas sensitivity, as well as good photocatalytic and photoelectric conversion properties. It is widely used in sensors, photocatalysts , electronic materials, paint coatings and other chemical raw materials and other fields, and it is expected that the use of solar energy will show broad application prospects in organic synthesis, photolysis of water and environmental governance. At present, people have made unremitting efforts to obtain nano titanium dioxide materials, such as a "preparation method of titanium dioxide nanometer mesoporous spheres" disclosed i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053B82Y30/00
Inventor 王拴许思超张云霞李广海
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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