Method for preparing hollow titanium dioxide nano-sphere

A technology of titanium dioxide and nanospheres, applied in the direction of titanium dioxide, nanostructure manufacturing, titanium oxide/hydroxide, etc., can solve the problems of adverse environmental effects, unfavorable large-scale production, inconvenience, etc., and achieve low cost, easy operation and simple equipment Effect

Inactive Publication Date: 2009-10-14
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But these prepared hollow TiO 2 The titanium source used in the method of nanomaterials is TiCl 4 or TiF 4 It is very unstable in the air, and it will undergo a violent hydrolysis reaction when it encounters humid air, and it is highly irritating, which brings inconvenience to the experimental operation and has adverse effects on the environment, which is not conducive to large-scale production
Therefore, using stable and inexpensive titanium-containing compounds as titanium sources to prepare hollow TiO 2 Nanomaterials still present great challenges

Method used

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  • Method for preparing hollow titanium dioxide nano-sphere
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  • Method for preparing hollow titanium dioxide nano-sphere

Examples

Experimental program
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Effect test

Embodiment 1

[0014] Dissolve 4mmol potassium fluoroborate in 80mL deionized water, add 8mmol titanium trichloride (16-18% solution) and 20mmol hydrogen peroxide (30% solution) under continuous stirring to obtain a clear solution Put it in a stainless steel reaction kettle with ethylene lining, seal it, put it in an oven at 180°C, keep it warm for 12 hours, cool to room temperature, wash the obtained precipitate repeatedly with deionized water and absolute ethanol, separate it by centrifugation, and dry it at 80°C for 24 hours , to obtain hollow titania nanospheres. figure 1 It is the X-ray diffraction pattern of the prepared hollow titanium dioxide nanosphere, which is consistent with the standard card JCPDS No.21-1272. It is a pure anatase phase, and the product has high crystallinity and purity. figure 2 (a) is a low-magnification field emission scanning electron microscope image of the prepared hollow titania nanospheres. It can be seen that the product is composed of a large number of...

Embodiment 2

[0016] Dissolve 4mmol of sodium fluoroborate in 80mL of deionized water, add 8mmol of titanium trichloride (16-18% solution) and 20mmol of hydrogen peroxide (30% solution) under continuous stirring to obtain a clear solution, and load it with polytetrafluoroethylene Put it in a stainless steel reaction kettle with ethylene lining, seal it, put it in an oven at 180°C, keep it warm for 12 hours, cool to room temperature, wash the obtained precipitate repeatedly with deionized water and absolute ethanol, separate it by centrifugation, and dry it at 80°C for 24 hours , to obtain hollow titania nanospheres. The structure and appearance of the product are the same as in Example 1.

Embodiment 3

[0018] Dissolve 5.3mmol potassium fluoroborate in 80mL deionized water, add 8mmol titanium trichloride (16-18% solution) and 16mmol hydrogen peroxide (30% solution) under continuous stirring to obtain a clear solution Put it in a stainless steel reaction kettle lined with vinyl fluoride, seal it, put it in an oven at 160°C, keep it warm for 16 hours, and cool it to room temperature. Hours, hollow titanium dioxide nanospheres were obtained. The structure and appearance of the product are the same as in Example 1.

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Abstract

The invention discloses a method for preparing a hollow titanium dioxide nano-sphere, which comprises the steps of dissolving fluoroborate in de-ionized water, adding titanium trichloride and hydrogen peroxide under continuous mixing to obtain clarified solution, putting the clarified solution in a stainless steel reaction kettle with a poly-tetrafluoroethylene internal lining, sealing the solution, putting the solution in a baking oven with the temperature of 160 DEG C to 200 DEG C to preserve temperature for 10 to 16 hours, cooling the solution to room temperature, repeatedly washing and centrifugation-separating the obtained precipitation and de-ionized water, and then obtaining the hollow titanium dioxide nano-sphere by drying for 12 to 24 hours at the temperature of 80 to 100 DEG C. The method has simple process, low cost and friendly environment and is suitable for mass production; the obtained product is expected to be used in files of catalysts, dye-sensitized solar cell materials, lithium-ion electrode materials and the like.

Description

technical field [0001] The invention relates to a preparation method of nanomaterials, in particular to a preparation method of hollow titanium dioxide nanospheres. Background technique [0002] Titanium dioxide (TiO 2 ) is an important semiconductor material. Due to its high photoelectric conversion efficiency, high photocatalytic activity, stable structure, and non-toxicity, TiO 2 It is widely used in photoelectric catalysis, solar energy utilization, pigments, sensors, lithium-ion batteries and other modern science and technology fields. Similar to other nanomaterials, TiO 2 The morphology, particle size, crystal phase composition, defects, impurities and other factors have an important impact on its photoelectric properties. Preparation of TiO with Unique Morphology 2 Nanomaterials are of great significance for further improving their optoelectronic properties. with common low-dimensional TiO 2 Different nanomaterials, three-dimensional hollow TiO 2 Nanomaterials...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82B3/00
Inventor 薛斌徐铸德刘润
Owner ZHEJIANG UNIV
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