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Method for manufacturing rutile-type titanium dioxide monocrystal nanowire arrays at normal pressure and low temperature

A nanowire array and titanium dioxide technology is applied in the field of low-temperature preparation of rutile-type titanium dioxide single crystal nanowire arrays, which can solve the problems of easy explosion, danger to people and equipment, and achieve the effects of low cost, easy operation and control, and simple process.

Inactive Publication Date: 2013-12-25
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation of single crystal nanowires by the hydrothermal / solvothermal method requires long-term work in a high-pressure environment. Due to the self-generated pressure of solvent vaporization or the aging of the reactor, it is easy to explode, causing danger to people and equipment.

Method used

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  • Method for manufacturing rutile-type titanium dioxide monocrystal nanowire arrays at normal pressure and low temperature
  • Method for manufacturing rutile-type titanium dioxide monocrystal nanowire arrays at normal pressure and low temperature
  • Method for manufacturing rutile-type titanium dioxide monocrystal nanowire arrays at normal pressure and low temperature

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) Measure 0.5mL of titanium trichloride (commercially available, the same below) and 40mL of nonanoic acid, mix them in a polytetrafluoroethylene container reaction device, stir with a magnetic stirrer for 20 minutes at room temperature, and set aside;

[0033] (2) Tighten the polytetrafluoroethylene container and put it into the incubator, set the reaction temperature to 150°C, and the reaction time to 12 hours, and naturally cool to room temperature after the reaction;

[0034] (3) After opening the polytetrafluoroethylene container of step polymer (2), take out the film, wash it several times with deionized water and absolute ethanol, and dry it in a constant temperature box at 60°C for 24 hours. The prepared titanium dioxide single The XRD pattern of the crystalline nanowire array is as follows figure 1 as shown in the figure 1 It can be seen that the marked crystal plane diffraction peaks correspond to titanium dioxide in the rutile crystal phase. figure 2 (a)...

Embodiment 2

[0036] (1) Measure 0.5mL of titanium trichloride and 40mL of nonanoic acid and mix them in a glass bottle container reaction device. The glass container is borosilicate glass, and stir with a magnetic stirrer for 20 minutes at room temperature for later use;

[0037] (2) Tighten the glass bottle and place it in an incubator, set the reaction temperature to 90°C, and the reaction time to 12 hours, and naturally cool to room temperature after the reaction;

[0038] (3) After opening the glass bottle of step polymer (2), take out the film and wash it several times with absolute ethanol and alcohol, and dry it in a constant temperature box at 60°C for 24 hours. The prepared titanium dioxide single crystal nanowire array XRD patterns such as Figure 4 as shown in the Figure 4 It can be seen that the marked crystal plane diffraction peaks correspond to titanium dioxide in the rutile crystal phase. Figure 5 As shown in the scanning electron microscope pictures, the prepared sampl...

Embodiment 3

[0040] (1) Measure 0.5mL of titanium trichloride and 40mL of nonanoic acid and mix them in a glass bottle container reaction device. The glass container is borosilicate glass, and stir with a magnetic stirrer for 20 minutes at room temperature for later use;

[0041] (2) Tighten the glass bottle and place it in an incubator, set the reaction temperature to 90°C, and the reaction time to 12 hours, and naturally cool to room temperature after the reaction;

[0042] (3) After opening the glass bottle of step polymer (2), take out the film and wash it several times with absolute ethanol and alcohol, and dry it in an incubator at 50°C for 36 hours. The prepared sample is composed of titanium dioxide nanowires The corresponding film thickness is 3.7 μm.

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Abstract

The invention discloses a method for manufacturing rutile-type titanium dioxide monocrystal nanowire arrays at a normal pressure and a low temperature. The method comprises the following steps: (1) titanium source and nonoic acid are used as raw materials, are mixed uniformly according to a certain stoichiometric proportion, and are placed into a glass bottle or a Teflon reaction vessel; (2) placing a normal pressure reaction vessel into a thermostat, setting the reaction temperature at 90-220 DEG C, and the reaction time at 1-100 h, after the reaction waiting for the vessel to cool to the room temperature; (3) taking the sample in the reaction vessel, washing, and drying, so that monocrystal rutile-type nanowire arrays. Compared with the conventional synthesis method of titanium dioxide nanowire arrays which utilizes vapor pressure generated from phase change solvent as hydrothermal / solvothermal, the method provided by the invention is an environmental-friendly, safe, synthesis method at the low temperature and the normal pressure.

Description

technical field [0001] The invention relates to a method for preparing a rutile titanium dioxide single crystal nanowire array at low temperature under normal pressure. Background technique [0002] Titanium dioxide is an important semiconductor material, which is widely used in solar cells, photocatalytic hydrogen production, photocatalytic degradation of organic matter, lithium batteries and gas phase sensors. The performance of titanium dioxide depends on its microscopic morphology, size and crystal form. Among the various nanostructures that have been reported, single crystal titania nanowires have become an important object of scientific research and industrial application due to their unique one-dimensional charge transport channel, which can quickly transport electrons and effectively suppress electron-hole recombination [Zhang et al. Q F, et al. Nanoscale, 2012, 4, 1436. Lin Y J, et al. Chemical Physics Letters 2011, 507, 209]. [0003] The reported methods for syn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B7/14C30B29/16B82Y40/00
Inventor 刘勇王晓悦周虞李宝军沈辉
Owner SUN YAT SEN UNIV
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