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A preparation method and application of porous titanium dioxide nanosheets with exposed {001} crystal planes

A technology of porous titanium dioxide and titanium dioxide, applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve problems such as long time, high risk, poor product morphology or performance

Active Publication Date: 2021-05-18
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method and application of porous titanium dioxide nanosheets with exposed {001} crystal faces, so as to solve the problems of high risk, long time, complicated process, morphology or performance of the obtained product in general preparation methods. bad question

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  • A preparation method and application of porous titanium dioxide nanosheets with exposed {001} crystal planes
  • A preparation method and application of porous titanium dioxide nanosheets with exposed {001} crystal planes
  • A preparation method and application of porous titanium dioxide nanosheets with exposed {001} crystal planes

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Embodiment 1

[0060]Example 1: 20 ml of cyclohexanol was accurately added, 2 mmol hexafluoritanic acid and 2.5 mmol of titanate tiprabutyl, stirred and dissolved to obtain a solution of milky white, transferred to a closed, pressure-resistant homogeneous reaction container In the rotation speed of 300 rpm, it was 150 min under temperature at 180 ° C; the product was rapidly cooled to room temperature, and the deionized water and anhydrous ethanol were washed repeatedly, centrifuged, centrifuged, and then obtained a pure white powder product after drying.

[0061]Product Bruker D8 Advance X-ray powder diffractometer (Cu Kα ray, wavelengthScan step rate is 0.08 ° / sec) identified as anatase TiO2powder(figure 1 ), Match the JCPDS card standard (No. 21-1272), no other impurities peaks.

[0062]Sub-8200 scanning electron microscopy to observe the rural TiO TiO2The morphology of the nanoflake, the result is likefigure 2 Indicated. The resulting product consists of a nano sheet having a size of 500 to 900 nm...

Embodiment 2

[0067]Example 2: 15 ml of cyclohexanol was accurately added, 1 mmol hexafluoritated acid and 3 mmol titanate tetrabutyl, stirred and dissolved to give a milky white solution; transfer the above solution to a closed, pressure-resistant homogeneous reaction vessel At 300 rpm rotation speed, the reaction was 180 min under 200 ° C; the product was quickly cooled to room temperature, and the deionized water and acetone were repeated, centrifuged, centrifuged, and then obtained a pure white powder product after crystallization.

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Abstract

The invention discloses a preparation method and application of porous titanium dioxide nanosheets with exposed {001} crystal faces, which belong to the preparation method and application of semiconductor photocatalytic materials. It specifically relates to a method for preparing porous titanium dioxide nanosheets with exposed {001} crystal planes in a reaction system of cyclohexanol-hexafluorotitanate-tetrabutyl titanate, and its use as a semiconductor material in the photocatalytic hydrogen evolution reaction of water decomposition Applications. In this method, hexafluorotitanic acid and tetrabutyl titanate are dissolved in cyclohexanol; the resulting solution is placed in a closed homogeneous reaction vessel for reaction; after the reaction is completed, it is rapidly cooled, and then separated, washed and dried to obtain target product. The method has simple process and good repeatability, and the obtained product has high purity, good dispersibility, uniform and controllable size distribution, nanoporous structure and high {001} crystal plane exposure ratio, and is expected to be mass-produced. Titanium dioxide nanosheets are used as photocatalytic materials, which have excellent performance in decomposing hydrogen from water, so they have good economic benefits and broad market prospects.

Description

Technical field[0001]The present invention relates to a method and use of a semiconductor photocatalytic material, in particular, a method and application of a porous titanium dioxide nanofilator exposed by a {001} crystal surface.Background technique[0002]As an important oxide semiconductor material, titanium dioxide (TiO2) Has been widely used in many areas such as environmental, energy, chemical, and life sciences. For TiO2For photocatalysts, many physical and chemical processes occur on the surface, and photocatalytic properties are largely dependent on their surface structure. Existing studies have shown that anatase TiO2The photocatalytic properties of materials in organic pollutants and water depends greatly depend on the type and proportion of the crystal exposed surface. Generally, anatase TiO2{101} crystal plane has the lowest surface energy (0.44JM-2) And preferred dynamic stability, therefore is easily exposed to the outer surface of the crystal to form a truncated octah...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053B82Y40/00B01J21/06B01J35/10C01B3/04
CPCC01G23/053B82Y40/00B01J21/063C01B3/042C01P2004/20C01P2006/16C01P2002/72C01P2004/03C01P2004/04B01J35/40B01J35/61Y02E60/36
Inventor 王鹏金永生滕淑华
Owner CHINA UNIV OF MINING & TECH