Linear porous titanium dioxide material and preparation method and application thereof

A porous titanium dioxide, wire-like technology, applied in titanium dioxide, chemical instruments and methods, catalyst activation/preparation, etc., to achieve the effect of improving application effect, increasing active sites, and increasing catalytic reaction active sites

Active Publication Date: 2019-02-12
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the porous titania materials reported so far are granular, such as porous spheres, porous nano-mesogenic particles, etc., which have more grain boundaries and tend to become the recombination centers of photogenerated electrons and holes.

Method used

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  • Linear porous titanium dioxide material and preparation method and application thereof
  • Linear porous titanium dioxide material and preparation method and application thereof
  • Linear porous titanium dioxide material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] This embodiment provides a method for preparing a linear porous titanium dioxide material, which includes the following steps:

[0061] Under the condition of stirring, disperse and dissolve 1 gram of titanium sulfate in 100 milliliters of aqueous solution to form a solution, then slowly add ammonia water with a concentration of 0.1 mol / liter to the above solution until the solution is neutral (pH value is about 7), so that Titanium sulfate is gradually and completely hydrolyzed to form hydrated titanic acid precipitate, and then the hydrated titanic acid precipitate is ultrasonically dispersed, washed with deionized water for several times, and centrifuged.

[0062] Secondly, hydrogen peroxide and lithium hydroxide are dissolved in water to form a concentration of lithium hydroxide of 0.6 mol / liter and a concentration of hydrogen peroxide of 0.8 mol / liter. Subsequently, the hydrated titanic acid precipitate after centrifugation was dispersed in 100 ml of the above-prep...

Embodiment 2

[0073] This embodiment provides a method for preparing a linear porous titanium dioxide material, which includes the following steps:

[0074] Under stirring conditions, disperse and dissolve 0.1 gram of titanyl sulfate in 100 milliliters of aqueous solution to form a solution, then slowly add ammonia water with a concentration of 0.01 mol / liter to the above solution until the solution is neutral (pH value is about 7), The titanium oxysulfate is gradually and completely hydrolyzed to form a hydrated titanic acid precipitate, and then the hydrated titanic acid precipitate is ultrasonically dispersed, washed with deionized water for several times, and centrifuged.

[0075] Next, dissolve hydrogen peroxide and lithium hydroxide in water to form lithium hydroxide with a concentration of 0.4 mol / liter and hydrogen peroxide with a concentration of 0.1 mol / liter. Subsequently, the hydrated titanic acid precipitate after centrifugation was dispersed in 100 ml of the above-prepared aqu...

Embodiment 3

[0078] This embodiment provides a method for preparing a linear porous titanium dioxide material, which includes the following steps:

[0079] Under stirring conditions, disperse and dissolve 6 grams of titanium tetrachloride in 100 milliliters of aqueous solution to form a solution, and then slowly add ammonia water with a concentration of 0.2 mol / liter to the above solution until the solution is neutral (pH value is about 7) , to gradually and completely hydrolyze titanium tetrachloride to form hydrated titanic acid precipitates, and then ultrasonically disperse the hydrated titanic acid precipitates, wash with deionized water several times, and centrifuge.

[0080] Next, dissolve hydrogen peroxide and lithium hydroxide in water to form lithium hydroxide with a concentration of 1.0 mol / liter and hydrogen peroxide with a concentration of 2.0 mol / liter. Subsequently, the hydrated titanic acid precipitate after centrifugation was dispersed in 100 ml of the above-prepared aqueou...

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Abstract

The invention provides a linear porous titanium dioxide material and a preparation method and application thereof. The linear porous titanium dioxide material is of an anatase-phase structure and a monocrystalline structure, and structurally consists of a plurality of particles; each particle has the fixed growth direction. The invention also provides the preparation method and application of thelinear porous titanium dioxide material. The titanium dioxide porous nanometer line has the advantages that the long axis of the structure is suitable for the effective transfer of electrons, so as tofacilitate the hydrogenation by photolysis of water, or degradation of organic pollutants by photocatalysis; the porous structure is suitable for the quick embedding-in and embedding-out process of lithium ions, sodium ions or potassium ions; the large specific surface area is suitable for the contact area between an electrolyte and an electrode, so that the current density is reduced, and the better battery quick charge and discharge property is realized.

Description

technical field [0001] The invention relates to a linear porous titanium dioxide material and its preparation method and application, belonging to the field of semiconductor functional materials and material preparation. Background technique [0002] Titanium dioxide is a research hotspot in the field of materials due to its broad application prospects in the fields of photolysis of water, catalysis, photocatalysis, lithium-ion batteries, sodium-ion batteries, potassium-ion batteries, dye-sensitized solar cells and sensors. [0003] The application performance of anatase titanium dioxide is closely related to its morphology and structure. For example, compared with titanium dioxide nanoparticles, the linear structure titanium dioxide nanomaterials can reduce the grain boundaries between particles, which is conducive to the transport of carriers in the direction of the long axis, and has the following characteristics: (1) in photocatalysis field, the linear structure is cond...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/047H01M4/485H01M10/0525H01M10/054H01G9/20B82Y30/00B82Y40/00
CPCH01M4/485H01M10/0525H01M10/054H01G9/2031B82Y30/00B82Y40/00C01G23/047C01G23/053C01G23/08C01G23/005C01P2004/03C01P2002/72C01P2002/76C01P2004/62C01P2004/64C01P2006/16Y02E10/542Y02E60/10C01G23/0532C01G23/0536B01J21/063B01J35/004B01J35/0013B01J37/04B01J37/033B01J37/082C01P2004/16C01P2004/04C01P2002/74C01P2002/85C01P2006/40B01J35/1061H01M2004/021
Inventor 李建明金旭王晓琦刘晓丹焦航孙亮苏玲
Owner PETROCHINA CO LTD
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