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A nanorod-assembled brookite and anatase mixed phase tio 2 Micron hollow sphere and its preparation method and application

A brookite and anatase technology, applied in the direction of titanium oxide/hydroxide, titanium dioxide, etc., can solve the problems of lack of application value, less research on structure and performance, instability, etc., to improve the electrochemical performance. Performance, easy operation, low reaction temperature effect

Inactive Publication Date: 2017-09-29
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Brookite-type titanium dioxide is difficult to prepare, and there are few studies on its structure and properties. Compared with the ideal octahedron, the titanium oxide octahedron in brookite is slightly deformed and unstable, which has not been reflected in the industry. its corresponding application value

Method used

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  • A nanorod-assembled brookite and anatase mixed phase tio <sub>2</sub> Micron hollow sphere and its preparation method and application
  • A nanorod-assembled brookite and anatase mixed phase tio <sub>2</sub> Micron hollow sphere and its preparation method and application
  • A nanorod-assembled brookite and anatase mixed phase tio <sub>2</sub> Micron hollow sphere and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A Brookite-Anatase Mixed Phase TiO with Nanorod Assembly 2 The micron hollow sphere material is prepared by the following method:

[0031] (1) Add 4.4mL of isobutyl titanate, 0.8mL of water and 1.9mL of oleylamine into 200mL of absolute ethanol, stir rapidly and uniformly for 1-2h, and obtain a white suspension, which is left to stand for 12h and then suction-filtered. White precipitate was obtained after washing and drying;

[0032] (2) Add 10mL of ethylenediamine into 40mL of deionized water, mix and stir evenly to obtain the mixed solution I;

[0033] (3) Add 0.2 g of the white precipitate obtained in step (1) into 20 mL of absolute ethanol, and stir evenly to obtain the mixed solution II;

[0034] (4) Add the mixed solution I to the mixed solution II, stir well for 2 hours, then place it in a 100mL polytetrafluoroethylene liner for hydrothermal reaction, the reaction temperature is 160°C, and the reaction time is 48 hours; then naturally cool to room temperature ...

Embodiment 2

[0037] A Brookite-Anatase Mixed Phase TiO with Nanorod Assembly 2 The micron hollow sphere material is prepared by the following method:

[0038] (1) Add 4.4mL of isobutyl titanate, 0.8mL of water and 2.0mL of oleylamine into 400mL of absolute ethanol, stir quickly and evenly for 2 hours to obtain a white suspension, leave it for 24 hours, suction filter, wash and dry A white precipitate was obtained after drying;

[0039] (2) Add 5 mL of ethylenediamine to 40 mL of deionized water, mix and stir evenly to obtain the mixed solution I;

[0040] (3) Add 0.5 g of the white precipitate obtained in step (1) into 20 mL of absolute ethanol, and stir evenly to obtain the mixed solution II;

[0041] (4) Add the mixed solution I to the mixed solution II, stir well for 2 hours, then place it in a 100mL polytetrafluoroethylene liner for hydrothermal reaction, the reaction temperature is 140°C, the reaction time is 24 hours, and then naturally cool to room temperature ; The reaction prod...

Embodiment 3

[0044] A Brookite-Anatase Mixed Phase TiO with Nanorod Assembly 2 The micron hollow sphere material is prepared by the following method:

[0045] (1) Add 4.4mL of isobutyl titanate, 0.8mL of water and 1.9mL of oleylamine into 300mL of absolute ethanol, stir quickly and uniformly for 1 hour to obtain a white suspension, leave it for 20 hours, filter it with suction, wash and dry A white precipitate was obtained after drying;

[0046] (2) Add 15mL of ethylenediamine into 40mL of deionized water, mix and stir evenly to obtain the mixed solution I;

[0047] (3) Add 0.25 g of the white precipitate obtained in step 1) into 10 mL of absolute ethanol, and stir evenly to obtain a mixed solution II;

[0048](4) Add the mixed solution I to the mixed solution II, stir well for 2 hours, then place it in a 100mL polytetrafluoroethylene liner for hydrothermal reaction, the reaction temperature is 150°C, the reaction time is 36 hours, and then naturally cool to room temperature . The reac...

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Abstract

The invention belongs to the field of TiO2 (titanium oxide) nanometer materials, and particularly relates to a nanorod-assembled type brookite and anatase mixed-phase TiO2 micrometer hollow sphere and a preparation method and an application thereof. The preparation method comprises the following steps of adding titanium tetraisobutanolate, water and oleylamine into absolute ethyl alcohol, quickly and uniformly stirring, obtaining a white suspension, standing, sucking and filtering, and washing and drying, so as to obtain a white precipitate; adding the white precipitate into the absolute ethyl alcohol, and uniformly stirring, so as to obtain a mixing liquid II; adding ethylenediamine into deionized water, and uniformly mixing and stirring, so as to obtain a mixing liquid I; adding the mixing liquid I into the mixing liquid II, fully stirring for 2-4h, and performing hydrothermal reaction, so as to obtain the brookite and anatase mixed-phase TiO2 micrometer hollow sphere material. The preparation method has the advantages that the reaction temperature is lower, the technology is simple, the prepared brookite and anatase mixed-phase TiO2 micrometer hollow sphere material is applied to prepare a lithium ion battery, and the electrochemisry property is excellent.

Description

technical field [0001] The present invention belongs to TiO 2 In the field of nanomaterials, it specifically relates to a mixed phase TiO of brookite and anatase assembled by nanorods 2 Micron hollow sphere and its preparation method and application. Background technique [0002] In modern life, energy shortage and environmental pollution have become important issues of social concern. Among them, lithium-ion batteries have been widely used in various portable electronic devices, such as mobile phones, cameras, and large energy storage devices, such as (hybrid) electric vehicles, due to their high energy density, rechargeable and non-polluting properties. [0003] Titanium dioxide has the advantages of non-toxicity, low price, and good stability, and has a wide application prospect in many fields such as wastewater treatment, solar energy conversion, and lithium-ion batteries. Titanium dioxide has three crystal forms: anatase, brookite and rutile. Among them, anatase and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053
CPCC01G23/053C01P2002/72C01P2004/03C01P2004/34C01P2004/62
Inventor 王洪恩蔡祎黄绍专蔡恒辉张润霖
Owner WUHAN UNIV OF TECH
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