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Flower-ball-shaped titanium dioxide and preparation method thereof

A titanium dioxide, curd-shaped technology, applied in the field of photocatalytic materials, can solve problems such as small size, and achieve the effects of good repeatability, novel appearance, and simple and controllable preparation process

Inactive Publication Date: 2015-07-22
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the large shape and size of the existing synthetic flower-shaped titanium dioxide and considering the function of the flower-like shape to photocatalyze the degradation of organic pollutants, the present invention provides a TiO 2 The spherical titanium dioxide self-assembled by nanosheets has small size and high specific surface area, which has potential application value in catalysts and other aspects

Method used

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  • Flower-ball-shaped titanium dioxide and preparation method thereof
  • Flower-ball-shaped titanium dioxide and preparation method thereof

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Embodiment 1

[0024] 1.1 Slowly add 25 mL of octanol to 0.5 mL of tetrabutyl titanate under stirring conditions, and stir evenly to obtain a mixed solution;

[0025] 1.2 Add 0.2 mL of hydrofluoric acid dropwise to the above mixed solution, and stir thoroughly to obtain a uniform and transparent solution;

[0026] 1.3 Transfer the uniform and transparent solution of 1.2 to the reaction kettle, and react at 160 °C for 20 h. After the reaction is completed, centrifuge and wash to obtain flower-shaped titanium dioxide. For the specific sample morphology, see figure 1 .

[0027] figure 1 It is the scanning electron micrograph of the obtained spherical titanium dioxide, from figure 1 It can be seen that the average particle size of the obtained product is 200nm, and the TiO 2 Self-assembled from nanosheets, the TiO 2 The average thickness of the nanosheets is 14 nm. figure 2 It is the X-ray diffraction spectrum of the sample obtained in this embodiment, as can be seen from the spectrum, ...

Embodiment 2

[0029] 2.1 Slowly add 25 mL of octanol to 0.5 mL of tetrabutyl titanate under stirring conditions, and stir evenly to obtain a mixed solution;

[0030] 2.2 Add 0.1 mL of hydrofluoric acid dropwise to the above mixed solution, and stir thoroughly to obtain a uniform and transparent solution;

[0031] 2.3 Transfer the uniform and transparent solution of 2.2 to a reaction kettle, react at 140°C for 20 h, and after the reaction is completed, centrifuge and wash to obtain flower-shaped titanium dioxide. The average particle size of the product is 160nm. by TiO 2 Self-assembled from nanosheets, the TiO 2 The average thickness of the nanosheets is 15 nm.

Embodiment 3

[0033] 3.1 Slowly add 25 mL of octanol to 0.5 mL of tetrabutyl titanate under stirring conditions, and stir evenly to obtain a mixed solution;

[0034] 3.2 Add 0.05 mL of hydrofluoric acid dropwise to the above mixed solution, and stir thoroughly to obtain a uniform and transparent solution;

[0035] 3.3 Transfer the uniform and transparent solution of 3.2 to a reaction kettle, and react for 20 h at 120 °C. After the reaction is completed, centrifuge and wash to obtain spherical titanium dioxide. The average particle size of the product is 190nm. by TiO 2 Self-assembled from nanosheets, the TiO 2 The average thickness of the nanosheets is 10 nm.

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Abstract

The invention discloses a flower-ball-shaped titanium dioxide and a preparation method thereof. The flower-ball-shaped titanium dioxide is 100-200 nm in particle size, formed by assembling titanium dioxide nanosheets and specifically prepared through the following steps: firstly, adding a titanium source into a certain amount of an octanol solvent so as to obtain a uniform transparent solution; dropwise adding hydrofluoric acid into the solution, stirring under room temperature so as to obtain a uniform transparent solution; finally, placing the uniform transparent solution in a reaction kettle for heat treatment for 3-20 h at 120-200 DEG C, and performing centrifugal separation and washing, so as to obtain the flower-ball-shaped titanium dioxide. In the preparation process, the flower-ball-shaped titanium dioxide of different particle sizes can be obtained by adjusting reaction temperature, reaction time and dosage of hydrofluoric acid. According to the invention, the preparation process is simple, the prepared flower-ball-shaped titanium dioxide is novel in shape, and has a wide application prospect in the field of catalysts and the like.

Description

technical field [0001] The invention relates to a curd-shaped titanium dioxide and a preparation method thereof, belonging to the technical field of photocatalytic materials. Background technique [0002] Due to its stable performance, high photocatalytic activity, non-toxic and harmless, low cost, and excellent biocompatibility, titanium dioxide is considered to be an ideal semiconductor photocatalytic material. Extensive research. Titanium dioxide has been prepared in a variety of shapes in the micro-nano scale, such as: nano-rods, nano-wires, nano-tubes and micro-nano spheres. Numerous studies have shown that the micro-morphology and crystal structure of titanium dioxide have a significant impact on its photocatalytic performance. Therefore, the preparation of titanium dioxide micro-nano materials with special micro-morphology has a positive reality for promoting the development of new energy and environmental governance. significance. Flower-like titanium dioxide has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82Y30/00B82Y40/00
Inventor 杨萍郑妍王俊鹏
Owner UNIV OF JINAN
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