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Preparation method of cauliflower-shaped brookite type titanium dioxide

A titanium dioxide, brookite-type technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of poor repeatability, short preparation period, low reaction temperature, etc., and achieve rich source of raw materials, short reaction period, low cost effect

Active Publication Date: 2016-03-23
SECOND MILITARY MEDICAL UNIV OF THE PEOPLES LIBERATION ARMY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The precursor used in the "cauliflower shape" disclosed in this patent is TiCl 4 , but some cauliflower-shaped and some rod-shaped parts appear during the preparation process, and the repeatability is not good
[0007] However, there is no report about a brookite-type titanium dioxide with simple process, short preparation period, low reaction temperature and good repeatability.

Method used

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  • Preparation method of cauliflower-shaped brookite type titanium dioxide
  • Preparation method of cauliflower-shaped brookite type titanium dioxide
  • Preparation method of cauliflower-shaped brookite type titanium dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Add deionized water and titanium trichloride to the polytetrafluoroethylene lining of the reaction kettle to obtain 20 ml of a 0.8 mol / L titanium trichloride solution. Then, ammonia water was added to adjust the pH to 11. Finally, 10 ml of 2.5 mol / L sodium borohydride solution was added, and after stirring evenly, the mixture was placed in a high-temperature and high-pressure reactor, and placed in an oven at 250°C for 18 hours of reaction.

[0037]After the reactor was cooled to room temperature, the supernatant was absorbed and discarded. The lower precipitate was washed 6 times with deionized water and once with absolute ethanol. After washing, the precipitate was put into an oven at 60° C. for 12 hours to be vacuum-dried to obtain a cauliflower-shaped brookite-type titanium dioxide material.

[0038] The scanning electron microscope figure of embodiment 1 gained product is as figure 2 As shown, it can be seen from the figure that the resulting product is a titan...

Embodiment 2

[0040] Add deionized water and titanium trichloride to the polytetrafluoroethylene lining of the reaction kettle to obtain 20 ml of a 0.8 mol / L titanium trichloride solution. Then, ammonia water was added to adjust the pH to 11. Finally, 10 ml of 2.5 mol / L sodium borohydride solution was added, stirred evenly, and the mixture was placed in a high-temperature and high-pressure reactor, and put into an oven at 250°C for 12 hours of reaction.

[0041] After the reactor was cooled to room temperature, the supernatant was absorbed and discarded. The lower precipitate was washed 6 times with deionized water and once with absolute ethanol. After washing, put the precipitate into a 60°C oven for vacuum drying for 12 hours to obtain a cauliflower-shaped brookite-type titanium dioxide material. image 3 is the scanning electron microscope image of the sample.

Embodiment 3

[0043] Add deionized water and titanium trichloride to the polytetrafluoroethylene lining of the reaction kettle to obtain 20 ml of a 0.8 mol / L titanium trichloride solution. Then, ammonia water was added to adjust the pH to 11. Finally, 10 ml of 2.5 mol / L sodium borohydride solution was added, stirred evenly, and the mixed solution was placed in a high-temperature and high-pressure reactor, and placed in an oven at 250°C for 24 hours of reaction.

[0044] After the reactor was cooled to room temperature, the supernatant was absorbed and discarded. The lower precipitate was washed 6 times with deionized water and once with absolute ethanol. After washing, put the precipitate into a 60°C oven for vacuum drying for 12 hours to obtain a cauliflower-shaped brookite-type titanium dioxide material. Figure 4 is the scanning electron microscope image of the sample.

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Abstract

The invention relates to the technical field of new energy materials, and in particular relates to a cauliflower-shaped brookite type titanium dioxide material and a preparation method thereof. The preparation method comprises the following steps: (A) preparing a titanium dioxide material by adopting a hydro-thermal method: adding a titanium precursor solution to an ammonia water and sodium borohydride solution under a stirring condition, and carrying out hydro-thermal reaction at 220-280 DEG C for 12-36h to obtain titanium dioxide precipitate; (B) washing; and (C) carrying out vacuum drying to obtain the cauliflower-shaped brookite type titanium dioxide material. The preparation method has the advantages that the preparation process is simple, the conditions are easy to control and the posttreatment is convenient, and is suitable for large-scale preparation of the cauliflower-shaped brookite type titanium dioxide material; and the cauliflower-shaped brookite type titanium dioxide material has important application in environment science and new energy fields.

Description

technical field [0001] The invention relates to the technical field of new energy materials, in particular to a method for preparing cauliflower-shaped brookite-type titanium dioxide. Background technique [0002] Since 1972, Fujishima and Honda published in Nature magazine about TiO 2 Since the paper on hydrogen production by electrolysis of water, TiO 2 A lot of research has been done as a catalyst. From the perspective of crystallography, TiO 2 It is homogeneous polycrystalline, and the common crystal phases are rutile phase, anatase phase and brookite phase. In recent years, large-scale self-assembled micro- and nanostructured TiO 2 The material has attracted widespread attention, but the preparation of brookite-type TiO 2 Less reported (Altomare, M, HighactivityofbrookiteTiO 2 nanoparticles in the photocatalytic abatement of ammonia in water. Catalysis Today. 2015.252.184-189; Min-Han Yang, Anatase and brookite TiO 2 with various morphologies and their proposed b...

Claims

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Application Information

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IPC IPC(8): C01G23/053
Inventor 苏永华凌昌全黄念
Owner SECOND MILITARY MEDICAL UNIV OF THE PEOPLES LIBERATION ARMY
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