Preparation method of titanium dioxide microspheres in poly-crystal face platy-monocrystal structures

A flake single crystal, titanium dioxide technology, applied in the field of nanomaterials, can solve problems such as orientation affecting crystal growth, increase material preparation cost and process difficulty, etc., and achieve the effects of low cost, simple method and high photocatalytic activity

Inactive Publication Date: 2015-01-14
HENAN UNIV OF SCI & TECH
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Problems solved by technology

Although the template method is easy to control the particle size of the microspheres and the size of the mesopores, the preparation of the template and the subsequent removal of the template will undoubtedly increase the cost of material preparation and the difficulty of the process.
In addition, for the preparation of materials with specific crystal planes, the addition of templates will affect the orientation of crystal growth

Method used

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  • Preparation method of titanium dioxide microspheres in poly-crystal face platy-monocrystal structures
  • Preparation method of titanium dioxide microspheres in poly-crystal face platy-monocrystal structures
  • Preparation method of titanium dioxide microspheres in poly-crystal face platy-monocrystal structures

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[0020] A preparation method of polycrystalline sheet-like single crystal structure titanium dioxide microspheres, the preparation method comprising the following steps:

[0021] Step 1, preparation of aqueous precursor solution: adding titanyl sulfate to water to prepare titanyl sulfate aqueous solution; adding fluorine-containing reagent to titanyl sulfate aqueous solution, so that the molar ratio of fluorine and titanium in the resulting mixed solution is 16:1- 24:1, which is the aqueous solution of the precursor, for later use;

[0022] The fluorine-containing reagent is hydrogen fluoride aqueous solution, sodium fluoride solid or sodium fluoride aqueous solution;

[0023] Step 2. Take the precursor aqueous solution prepared in the above step 1 and add it to the reactor according to the ratio of the volume of the precursor aqueous solution to the volume of the reactor at a ratio of 7:10. After incubation at 180° C. for 12 hours, naturally cool to room temperature to obtain ...

Embodiment 1

[0028] A preparation method of polycrystalline sheet-like single crystal structure titanium dioxide microspheres, the preparation method comprising the following steps:

[0029] Step 1, preparation of aqueous precursor solution: adding titanyl sulfate to water to prepare titanyl sulfate aqueous solution; adding fluorine-containing reagent to titanyl sulfate aqueous solution, so that the molar ratio of fluorine and titanium in the resulting mixed solution is 16:1- 24:1, which is the aqueous solution of the precursor, for later use;

[0030] The fluorine-containing reagent is hydrogen fluoride aqueous solution, sodium fluoride solid or sodium fluoride aqueous solution;

[0031] Step 2. Take the precursor aqueous solution prepared in the above step 1 and add it to the reactor according to the ratio of the volume of the precursor aqueous solution to the volume of the reactor at a ratio of 7:10. After incubation at 180° C. for 12 hours, naturally cool to room temperature to obtain ...

Embodiment 2

[0035] A preparation method of polycrystalline sheet-like single crystal structure titanium dioxide microspheres, the preparation method comprising the following steps:

[0036] Step 1, preparation of aqueous precursor solution: adding titanyl sulfate to water to prepare titanyl sulfate aqueous solution; adding fluorine-containing reagent to titanyl sulfate aqueous solution, so that the molar ratio of fluorine and titanium in the resulting mixed solution is 16:1- 24:1, which is the aqueous solution of the precursor, for later use;

[0037] The fluorine-containing reagent is hydrogen fluoride aqueous solution, sodium fluoride solid or sodium fluoride aqueous solution;

[0038] Step 2. Take the precursor aqueous solution prepared in the above step 1 and add it to the reactor according to the ratio of the volume of the precursor aqueous solution to the volume of the reactor at a ratio of 7:10. After incubation at 180° C. for 12 hours, naturally cool to room temperature to obtain ...

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Abstract

The invention discloses a preparation method of titanium dioxide microspheres in poly-crystal face platy-monocrystal structures and relates to a preparation method of a nano material. The preparation method comprises the following steps: adding a fluorine containing reagent into a titanyl sulfate aqueous solution to prepare a precursor aqueous solution with the molar ratio of fluorine and titanium of (16:1) to (24:1); adding the precursor aqueous solution into a reaction kettle in a volume ratio of the precursor aqueous solution and the reaction kettle of 7:10, insulating and incubating for 12 hours at 180 DEG C and cooling to obtain a reactant; carrying out suction filtration on the reactant, and after the obtained filter cake is washed and sucked by deionized water, placing in a vacuum drying box to be dried and taken out; and after calcining the obtained filter cake in a ceramic boat in a muffle furnace at 450 DEG C, cooling to room temperature to obtain white powder so as to obtain the titanium dioxide microspheres in poly-crystal face platy-monocrystal structures. The titanium dioxide microspheres prepared by the preparation method disclosed by the invention are in smooth dehorned octahedral anatase titanium dioxide monocrystal structures. The side lengths of the titanium dioxide microspheres are 1.3-3.2 mu m and the thicknesses of the titanium dioxide microspheres are 0.6-1.0 mu m.

Description

technical field [0001] The invention relates to a nanometer material, in particular to a preparation method of a polycrystalline sheet single-crystal structure titanium dioxide microsphere. Background technique [0002] Titanium dioxide has attracted extensive attention from researchers due to its rich resources, safety, non-toxicity, and stable structure. It has been widely studied and applied in the fields of functional ceramics, gas sensors, and photocatalysis. It is also a solar cell with great development potential. and electrode materials for lithium-ion batteries. However, the simple structure and blocky titanium dioxide cannot fully exert its performance to meet the needs of practical applications. The preparation of functionalized titanium dioxide with specific structure and large specific surface area is of great significance to improve and enhance its performance. Studies have shown that hollow spherical titanium dioxide with hierarchical structure has excellen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/16C30B7/14C30B29/64
CPCC30B7/14C30B29/16C30B29/64
Inventor 雷建飞杜凯倪静魏荣慧张少峰李立本
Owner HENAN UNIV OF SCI & TECH
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