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Method for preparation of unidimensional monocrystal titanium dioxide nano material

A technology of titanium dioxide and nanomaterials, applied in the field of nanomaterials, can solve the problems of complex experimental procedures, high costs, and high prices, and achieve the effects of simple preparation methods, high product yields, and low prices

Inactive Publication Date: 2005-11-23
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the former method obtains high-purity single-crystal titanium dioxide nanowires and nanotubes, the experimental process is complicated; the latter method has a relatively simple experimental process, but the prepared titanium dioxide nanowires are not pure enough, and anatase contains a considerable amount of Furthermore, the raw materials used in the former method are generally higher price metal alkoxides, the cost is higher, and the aspect ratio of the prepared titanium dioxide nanowires and nanotubes is not high
More importantly, neither method can realize the control of shape and shape through the regulation of experimental conditions and experimental parameters.

Method used

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  • Method for preparation of unidimensional monocrystal titanium dioxide nano material
  • Method for preparation of unidimensional monocrystal titanium dioxide nano material
  • Method for preparation of unidimensional monocrystal titanium dioxide nano material

Examples

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Effect test

Embodiment 1

[0039] Take 25 parts by weight of commercial P25 powder and add it to 75 parts by weight of butanol, stir vigorously to obtain a uniformly dispersed mixture; under rapid stirring, add 70 parts by weight of 50 parts by weight of sodium hydroxide solution to 30 parts by weight of the above mixture The solution generated in 50 parts by weight of deionized water was continuously stirred for several minutes, then transferred into a polytetrafluoroethylene-lined autoclave, kept at 110° C. for 8 hours, and cooled naturally to room temperature. The supernatant was decanted, the lower precipitate was washed several times with deionized water and dilute sulfuric acid, centrifuged, and dried in an oven at 60° C. for 12 hours to obtain one-dimensional single-crystal titanium dioxide nanowires.

Embodiment 2

[0041] Take 1 part by weight of anatase titanium dioxide powder and add it to 99 parts by weight of dodecylamine, stir vigorously to obtain a uniformly dispersed mixture; add 82 parts by weight of 15 parts by weight of hydrogen to 18 parts by weight of the above mixture under rapid stirring The solution formed by dissolving sodium oxide in 85 parts by weight of deionized water was continuously stirred for several minutes, then transferred into a polytetrafluoroethylene-lined autoclave, kept at a constant temperature of 150°C for 2 hours, and cooled naturally to room temperature. The supernatant was decanted, the lower precipitate was washed several times with deionized water and dilute acetic acid, centrifuged, and dried in an oven at 120° C. for two days to obtain one-dimensional single-crystal titanium dioxide nanorods.

Embodiment 3

[0043] Take 15 parts by weight of commercial P25 powder and add it to 85 parts by weight of ethanol, and stir vigorously to obtain a uniformly dispersed mixture; under rapid stirring, add 50 parts by weight of 25 parts by weight of sodium hydroxide dissolved in 75 parts by weight to 50 parts by weight of the above mixture The solution generated in parts by weight of deionized water was continuously stirred for several minutes, then transferred into a polytetrafluoroethylene-lined autoclave, kept at a constant temperature of 200° C. for 16 hours, and cooled naturally to room temperature. The supernatant was decanted, the lower precipitate was washed several times with deionized water and dilute nitric acid, centrifuged, and dried at room temperature for three days to obtain a one-dimensional single crystal titanium dioxide nanowire.

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Abstract

The present invention belongs to the field of nanometer material technology. The procedure is: 1) adding 1-30 parts of TiCl4 or TiO2 powder to 70-99 parts of organic solvent, obtaining evenly distributed mixture, 2) dissolving 10-60 parts of potassium hydroxide in 40-90 parts of deionization water, obtaining NaOH solution, 3) adding 20-80 parts NaOH solution of step 2)to 10-50 parts solution of step 1), stirring and moving to an autoclave, thermostatically heating at 50-300 degree C, 4) cooling down and pouring out the supernatant liquid, washing the bottom precipitation with deionization water and diluted acid solution, followed by centrifugal separating and drying at 10-200 degree C. The product obtained is one dimension single crystal nanometer material (nano-wire, nano-rod, and nano-tube) of TiO2 with diameter of 10-100 nm and length of micrometer order of magnitude. The product of the present invention is of high purity and high yield rate, and the form and pattern can be adjusted through selecting different solvents.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and mainly relates to a preparation method of one-dimensional single-crystal titanium dioxide nanomaterials (nanowires, nanorods, and nanotubes). Background technique [0002] One-dimensional nanomaterials have broad application prospects in the fields of optics, electronics, environment and medicine, and have become a hotspot in the field of materials research. Titanium dioxide, as an n-type semiconductor and a typical photocatalyst, is particularly attractive for its broad application prospects in photoelectric conversion, photovoltaic devices, photocatalytic degradation of pollutants, and photolysis of water to generate hydrogen. At present, some research work has been carried out in the preparation of one-dimensional single crystal titanium dioxide nanomaterials. There are two main preparation methods commonly used, one is the template method, and the o...

Claims

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Application Information

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IPC IPC(8): C30B7/10
Inventor 刘春艳温宝妹刘云
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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