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A kind of graded titanium dioxide with mixed structure and preparation method thereof

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: 2017-12-05
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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  • A kind of graded titanium dioxide with mixed structure and preparation method thereof
  • A kind of graded titanium dioxide with mixed structure and preparation method thereof
  • A kind of graded titanium dioxide with mixed structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Place the 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 were heated to 35°C, and stirred at 35°C for 30min until the solution became a clear solution. Then take 1.7g of TBT and slowly add it dropwise into the solution under stirring, the solution gradually turns from clear to white suspension, and after sealing, stir and react at constant temperature for 2h. The obtained white suspension was transferred to a 100mL reaction kettle, and placed in a thermostat at 150°C for 24h. 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 10h, and calcined at 500°C for 4h in a tubular calciner to obtain a graded titanium dioxide with a mixed structure, such as Figures 1 to 6 As shown, it is composed of flower-shaped microspheres composed of polycrystalline ...

Embodiment 2

[0039] Place the 100mL beaker on a magnetic stirrer, add 1g P123(EO 20 -PO70 -EO 20 , molecular weight M n = 5800) and 35 mL of acetic acid were heated to 35 °C, and stirred at 35 °C for 30 min until the solution became a clear solution. Then 1.9 g of TBT was slowly added dropwise to the solution under stirring, and the solution gradually changed from clear to white suspension. After sealing, the reaction was stirred at constant temperature for 2 hours. The obtained white suspension was transferred to a 100 mL reaction kettle and placed in a 150°C incubator 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 h, and then calcined in a tubular calciner at 500 °C for 4 h to obtain graded titanium dioxide with a mixed structure, the morphology was similar to that of Example 1.

Embodiment 3

[0041] Place a 100mL beaker on a magnetic stirrer and add 1g of P123 (EO 20 -PO 70 -EO 20 , molecular weight M n = 5800) and 35 mL of acetic acid were heated to 35 °C, and stirred at 35 °C for 30 min until the solution became a clear solution. Then take 2.1g of TBT and slowly add it dropwise to the solution under stirring, the solution slowly changes from clear to white suspension, and after sealing, constant temperature stirring reaction for 2h. The obtained white suspension was transferred to a 100 mL reaction kettle and placed in a 150°C incubator 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 h, and then calcined in a tubular calciner at 500 °C for 4 h to obtain graded titanium dioxide with a mixed structure, the morphology was 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 graded titanium dioxide with a mixed structure and a preparation method thereof, belonging to the technical field of material synthesis. Background technique [0002] In recent years, titanium dioxide with a three-dimensional hierarchical structure constructed from low-dimensional units has superior performance in terms of electron capture and high-performance dye enrichment due to its large specific surface area, porosity, and shape 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 TiO with rutile three-dimensional dendrite structure using isopropyl titanate as titanium source and adding surfactant CTAB. 2 nanomaterials. By adjusting the compositi...

Claims

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Application Information

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Patent Type & Authority Patents(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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