Preparation method for super-long titanium dioxide nanowire

A technology of titanium dioxide and nano-titanium dioxide, applied in the directions of titanium dioxide, titanium oxide/hydroxide, nanotechnology, etc., can solve the problem of not being able to meet the performance requirements well, and achieve the simple preparation method, low preparation cost and wide applicability. Effect

Inactive Publication Date: 2016-01-06
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the length of titanium dioxide nanotube nanowires prepared by traditional hydrothermal method and anodic oxidation method is between a few nanometers and tens of nanometers, which cannot meet the performance requirements well.

Method used

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  • Preparation method for super-long titanium dioxide nanowire

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Effect test

Embodiment 1

[0019] The preparation method of the ultra-long titanium dioxide nanowires described in this embodiment specifically includes the following steps:

[0020] (1) Put nano-titanium dioxide powder in 10mol / L sodium hydroxide solution at a ratio of 20g / L, and stir electromagnetically to make it evenly mixed;

[0021] (2) Put the mixed solution obtained in step (1) into the reaction kettle, and react in an oil bath at 100°C (300r / min) for 24h;

[0022] (3) Centrifuge the reacted solution, wash the precipitate with deionized water until the pH is 9, and then wash with 0.3 mol / L dilute nitric acid until the pH is 7 to obtain ultra-long titanium dioxide nanowires.

[0023] Depend on figure 1 It can be seen that the prepared titanium dioxide nanowires exist in the form of dispersed fibers, and most of the titanium dioxide nanowires shown in the figure have a length of more than 5 μm and a relatively high specific surface area.

Embodiment 2

[0025] The preparation method of the ultra-long titanium dioxide nanowires described in this embodiment specifically includes the following steps:

[0026] (1) Put nano-titanium dioxide powder in 12mol / L sodium hydroxide solution at a ratio of 30g / L, and stir electromagnetically to make it evenly mixed;

[0027] (2) Put the mixed solution obtained in step (1) into the reaction kettle, and react in an oil bath at 120°C (400r / min) for 22h;

[0028] (3) The reacted solution was centrifuged, and the precipitate was washed with deionized water until the pH was 9, and then washed with 0.1 mol / L dilute nitric acid until the pH was 7 to obtain ultra-long titanium dioxide nanowires.

Embodiment 3

[0030] The preparation method of the ultra-long titanium dioxide nanowires described in this embodiment specifically includes the following steps:

[0031] (1) Put nano-titanium dioxide powder in 8mol / L sodium hydroxide solution at a ratio of 40g / L, and stir it to make it evenly mixed;

[0032] (2) Put the mixed solution obtained in step (1) into the reaction kettle, and react in an oil bath at 140°C (500r / min) for 20h;

[0033] (3) The reacted solution was centrifuged, and the precipitate was washed with deionized water until the pH was 9, and then washed with 0.2 mol / L dilute nitric acid until the pH was 7 to obtain ultra-long titanium dioxide nanowires.

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Abstract

The invention discloses a preparation method for a super-long titanium dioxide nanowire, belonging to the technical field of preparation of a nano material. The preparation method is characterized by comprising the following steps of: selecting a highly-dispersed titanium dioxide P25 generated by an AEROSL process, enabling the titanium dioxide P25 to react with sodium hydroxide, placing a solution in a reaction kettle, carrying out mechanical stirring on the reaction kettle, and leading the ultra-fine and super-long titanium dioxide nanowire to grow by a mechanical external force. The preparation method has the advantages that the length of the titanium dioxide nanowire prepared according to the method is between 10 micrometers and 15 micrometers, and the titanium dioxide nanowire has higher specific surface area and higher absorption ability.

Description

technical field [0001] The invention relates to a method for preparing ultra-long titanium dioxide nanowires, belonging to the technical field of nanomaterial preparation. Background technique [0002] With the gradual depletion of energy sources such as petroleum and coal, and the increasing environmental pollution, clean and green renewable energy has become a global research hotspot. As an environmentally friendly lithium battery material, titanium dioxide has stable performance, high photoelectric conversion rate, high rate performance and cycle stability, fast charge and discharge performance and high capacity, and good reversibility of lithium deintercalation. The battery field has a good application prospect. [0003] However, the length of titanium dioxide nanotube nanowires prepared by traditional hydrothermal method and anodic oxidation method is between several nanometers and tens of nanometers, which cannot meet the performance requirements well. [0004] The m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M10/0525B82Y30/00B82Y40/00C01G23/053
CPCB82Y30/00B82Y40/00C01G23/053H01M4/48H01M10/0525Y02E60/10
Inventor 刘建雄张冠群
Owner KUNMING UNIV OF SCI & TECH
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