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Hierarchical TiO2 adopting mixed structure and preparation method of hierarchical TiO2

A titanium dioxide, mixed structure technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, nanotechnology for materials and surface science, etc. The effect of photocatalytic and electrochemical performance

Active Publication Date: 2017-02-22
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reported hierarchical structure TiO 2 Most of them are composed of a single building unit with a single structure
It has not been reported that a triblock copolymer P123, namely: polyoxyethylene-polyoxypropylene-polyoxyethylene, was used as a structure-directing agent to prepare a graded titanium dioxide with a mixed structure by a solvothermal method.

Method used

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  • Hierarchical TiO2 adopting mixed structure and preparation method of hierarchical TiO2

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Place a 100mL beaker on a magnetic stirrer, add 1g P123(EO 20 -PO 70 -EO 20 , Molecular weight M n =5800) and 35mL of acetic acid are heated to 35°C, and stirred at 35°C for 30min until the solution becomes a clear solution. Then take 1.7g of TBT and slowly drop it into the solution under stirring, the solution slowly turns from clear to white suspension, and after sealing, the reaction is stirred at constant temperature for 2h. The obtained white suspension was transferred to a 100mL reaction kettle and placed in a 150°C thermostat for 24h. After cooling, the obtained white precipitate was centrifuged, and the obtained precipitate was repeatedly washed with distilled water and ethanol. Then the resulting precipitate was dried at 50°C for 10 hours, and then calcined in a tubular calciner at 500°C for 4 hours to obtain a mixed structure of graded titanium dioxide, such as Figure 1~6 As shown, it is composed of flower-like microspheres composed of polycrystalline anatase...

Embodiment 2

[0039] Place a 100mL beaker on a magnetic stirrer, add 1g P123(EO 20 -PO 70 -EO 20 , Molecular weight M n =5800) and 35mL of acetic acid are heated to 35°C, and stirred at 35°C for 30min until the solution becomes a clear solution. Then take 1.9g of TBT and slowly add dropwise to the solution under stirring. The solution slowly turns from clear to white suspension. After sealing, the reaction is stirred at constant temperature for 2h. The obtained white suspension was transferred to a 100 mL reaction kettle, and placed in a 150° C. thermostat for 24 hours. After cooling, the obtained white precipitate was centrifuged, and the obtained precipitate was repeatedly washed with distilled water and ethanol. Then, the obtained precipitate was dried at 50° C. for 10 hours, and then calcined in a tubular calciner at 500° C. for 4 hours to obtain a mixed structure of hierarchical titanium dioxide with a morphology similar to that of Example 1.

Embodiment 3

[0041] Place a 100mL beaker on a magnetic stirrer, add 1g P123(EO 20 -PO 70 -EO 20 , Molecular weight M n =5800) and 35mL of acetic acid are heated to 35°C, and stirred at 35°C for 30min until the solution becomes a clear solution. Then take 2.1g of TBT and slowly add dropwise to the solution under stirring, the solution slowly turns from clear to white suspension, and after sealing, the reaction is stirred at constant temperature for 2h. The obtained white suspension was transferred to a 100 mL reaction kettle, and placed in a 150° C. thermostat for 24 hours. After cooling, the obtained white precipitate was centrifuged, and the obtained precipitate was repeatedly washed with distilled water and ethanol. Then, the obtained precipitate was dried at 50° C. for 10 hours, and then calcined in a tubular calciner at 500° C. for 4 hours to obtain a mixed structure of hierarchical titanium dioxide with a morphology similar to that of Example 1.

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Abstract

The invention discloses hierarchical TiO2 adopting a mixed structure and a preparation method of hierarchical TiO2. TBT (tetrabutyl titanate) is taken as a Ti source, a triblock copolymer P123 is taken as a structure-directing agent, acetic acid is taken as a solvent, and hierarchical TiO2 adopting the mixed structure is prepared through a solvent heating process and high-temperature calcination. The prepared hierarchical TiO2 adopting the mixed structure comprises flower-like microspheres and single-crystal anatase type mesoporous TiO2 nanospheres, the flower-like microspheres comprise polycrystal anatase type TiO2 nanosheets, the diameter of each flower-like microsphere is 1-1.5 mu m, the thickness of each nanosheet is 10-13 nm, and the diameter of each mesoporous nanosphere is about 180-220 nm. The prepared material has larger specific surface area and rich double-mesopore porous structure, has single morphology and good dispersity and can be taken as a photocatalyst and a lithium ion battery anode material.

Description

Technical field [0001] The invention relates to a graded titanium dioxide with a mixed structure and a preparation method thereof, and belongs to the technical field of material synthesis. Background technique [0002] In recent years, the three-dimensional hierarchical structure of titanium dioxide constructed from low-dimensional units has superior performance in terms of electron capture and high-performance dye enrichment due to its larger specific surface area, porosity and morphology controllability. It has received extensive attention from researchers in the fields of lithium batteries, dye-sensitized solar cells, and photocatalysis. [0003] Currently, hierarchical TiO 2 The preparation methods mainly include hydrothermal method, solvothermal method and sol-gel method. Sun et al. hydrothermally synthesized rutile three-dimensional dendritic TiO with isopropyl titanate as the titanium source and added the surfactant CTAB. 2 nanomaterials. By adjusting the composition and p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G23/053C01P2002/72C01P2004/04C01P2004/32C01P2004/61C01P2004/64C01P2006/12C01P2006/16
Inventor 周国伟李世超姜萌萌李艳
Owner QILU UNIV OF TECH
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