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Mesoporous TiO2-B nanowire and preparation method thereof

A nanowire and tio2-b technology, applied in the field of titanium nanowire materials, can solve the problems of no mesopores and the inability to form lithium storage cells, and achieve low cost, improved electrochemical performance, and environmental friendliness

Inactive Publication Date: 2016-01-06
SHANGHAI DIANJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention is aimed at TiO 2 -B nanowire material has no lack of mesopores on the surface, and a new type of TiO with mesoporous structure has been developed 2 -B nanowire material, which overcomes the existing TiO 2 -B nanowires cannot form a lithium storage cell, which significantly improves the electrochemical performance

Method used

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  • Mesoporous TiO2-B nanowire and preparation method thereof
  • Mesoporous TiO2-B nanowire and preparation method thereof
  • Mesoporous TiO2-B nanowire and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0019] 4mlTiCl 4 , 4ml of ethylene glycol and 40ml of 10mol / L concentrated NaOH solution were mixed and stirred for 10min. The mixed solution was transferred to a 100ml stainless steel autoclave with a Teflon lining, reacted at 180°C for 24h, and cooled to room temperature naturally. After centrifugation, the resulting precipitate was repeatedly washed with deionized water until neutral. Dry at 60°C for 8h, put the dried powder in a muffle furnace and sinter at 400°C for 2h, and cool naturally to obtain mesoporous TiO 2 -B nanowire material.

Embodiment 2

[0021] Mix 4 ml of n-tetrabutyl titanate, 4 ml of ethylene glycol and 40 ml of a 10 mol / L concentrated NaOH solution, and stir for 10 min. The mixed solution was transferred to a 100ml stainless steel autoclave with a Teflon lining, reacted at 180°C for 24h, and cooled to room temperature naturally. After centrifugation, the resulting precipitate was repeatedly washed with deionized water until neutral. Dry at 60°C for 8h, put the dried powder in a muffle furnace and sinter at 400°C for 2h, and cool naturally to obtain mesoporous TiO 2 -B nanowire material.

Embodiment 3

[0023] Mix 4 ml of n-tetrabutyl titanate, 4 ml of ethylene glycol and 40 ml of a 10 mol / L concentrated NaOH solution, and stir for 10 min. The mixed solution was transferred to a 100 ml stainless steel autoclave with a Teflon lining, reacted at 200° C. for 24 h, and cooled to room temperature naturally. After centrifugation, the resulting precipitate was repeatedly washed with deionized water until neutral, and then diluted with HNO. 3 The solution was soaked for 12h and washed with ethanol and deionized water until neutral. Dry at 60°C for 8h, put the dried powder in a muffle furnace and sinter at 400°C for 2h, and cool naturally to obtain mesoporous TiO 2 -B nanowire material.

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Abstract

The invention provides a mesoporous TiO2-B nanowire. A tube diameter is 20 to 30 nanometers, a tube length is 0.5 to 2 micrometers, mesopores are uniformly formed in the surface, and the aperture of each mesopore is 2 to 5 nanometers. The invention also provides a preparation method of the material. The preparation method comprises the following steps: mixing a titanium source with ethylene glycol and a concentrated alkaline solution, reacting for 20 to 30 hours at the temperature of 180 to 250 DEG C, and after the reaction is ended, cooling to the room temperature; centrifugally separating precipitates, washing the precipitates to be neutral, drying the precipitates, sintering powder for 2 to 4 hours at the temperature of 100 to 400 DEG C, and naturally cooling to obtain the novel mesoporous TiO2-B nanowire. By adopting the simple hydrothermal treatment and ion exchanging treatment, the novel mesoporous TiO2-B nanowire material is prepared, the mesopores are uniformly formed in the surface of the TiO2-B nanowire, and the prepared mesoporous TiO2-B nanowire material can be used as a negative electrode material of a lithium ion battery, can be applied to the field of lithium ions, can improve the capacity and can improve the rate capability.

Description

technical field [0001] The invention relates to titanium nanowire materials, in particular to a mesoporous TiO 2 -B nanowires, and the preparation of the mesoporous TiO 2 -B Nanowire method. Background technique [0002] TiO 2 -B is a metastable crystal form, which is a metastable titanium oxide homogeneous variant with lower density and looser structure than rutile and anatase. The characteristic parallel channels in the 010] direction are beneficial to the combination and diffusion of lithium ions in the channels when used in lithium batteries. Compared with crystal forms such as anatase and rutile, it has a higher reversible specific capacity. TiO 2 -B nanowires have a one-dimensional structure with favorable Li + transmission channel such that Li + in TiO 2 The intercalation and deintercalation in -B are relatively easy and can exhibit excellent fast charge-discharge capability. And it has a mesoporous pore size, capable of storing Li + ion. When used as a lit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82Y40/00
CPCC01G23/053C01G23/0536C01P2002/72C01P2004/03C01P2004/04C01P2004/16C01P2006/16
Inventor 林晓晨肖骁琦王敬锋
Owner SHANGHAI DIANJI UNIV