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Anatase type titanium dioxide nanocrystalline as well as preparation method and application thereof

An anatase type, titanium dioxide technology, applied in titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of limiting titanium dioxide nanocrystals, low reaction rate, etc., and achieves low band gap energy and simple operation. , easy-to-control effects

Active Publication Date: 2020-11-17
CHINA BUILDING MATERIALS ACAD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the relatively low reaction rate of non-hydrolytic reactions limits the diversity of possible morphologies of TiO nanocrystals to some extent.

Method used

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  • Anatase type titanium dioxide nanocrystalline as well as preparation method and application thereof
  • Anatase type titanium dioxide nanocrystalline as well as preparation method and application thereof
  • Anatase type titanium dioxide nanocrystalline as well as preparation method and application thereof

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preparation example Construction

[0050] The present invention proposes a kind of preparation method of anatase titanium dioxide nanocrystal, it comprises the following steps:

[0051] 1) adding a morphology control agent and a titanium source to the solvent, stirring evenly to obtain a precursor solution; the solvent includes at least acetic acid; the morphology control agent is selected from hexadecyltrimethylammonium bromide and at least one of hydrofluoric acid;

[0052] 2) The precursor solution is subjected to solvothermal reaction at 150° C. to 220° C. for 12 to 72 hours, centrifuged, washed, dried, and ground to obtain anatase titanium dioxide nanocrystals.

[0053] The technical scheme of the present invention uses hydrofluoric acid and / or hexadecyltrimethylammonium bromide as the morphology control agent, uses acetic acid as the solvent or contains acetic acid in the solvent, prepares the precursor solution together with the titanium source, and makes the precursor The solution undergoes solvotherma...

Embodiment 1

[0088] In this embodiment, an anatase titanium dioxide nanocrystal with a cube shape is prepared, and the steps are as follows:

[0089] 1) Disperse 0.24g of cetyltrimethylammonium bromide (CTAB) into 100mL of acetic acid under constant stirring, and stir for 30min;

[0090] 2) Add 4mL tetrabutyl titanate (TBT) dropwise, add 0.24g hydrofluoric acid (HF), stir for 60min, put it into a 200mL stainless steel reactor lined with polytetrafluoroethylene for solvothermal reaction, and the reaction temperature is 180 ℃, reaction time 24h;

[0091] 3) After the solvothermal reaction, the obtained precipitate was centrifuged, washed, dried, and ground to obtain anatase-type TiO with a cube shape. 2 Nanocrystalline.

[0092] Titanium dioxide nanocrystals prepared in this embodiment are scanned by electron microscope, and the results are as attached figure 1 shown by the attached figure 1 It can be seen from the SEM image that the TiO of this embodiment 2 Nanocrystals are generally i...

Embodiment 2

[0094] In this embodiment, an anatase titanium dioxide nanocrystal with a cube shape is prepared, and the steps are as follows:

[0095] 1) Disperse 0.24g of cetyltrimethylammonium bromide (CTAB) into 100mL of acetic acid under constant stirring, and stir for 30min;

[0096] 2) Add 4mL tetrabutyl titanate (TBT) dropwise, add 0.48g hydrofluoric acid (HF), stir for 60min, put it into a 200mL stainless steel reactor lined with polytetrafluoroethylene for solvothermal reaction, and the reaction temperature is 180 ℃, reaction time 24h;

[0097] (3) After the solvothermal reaction, the obtained precipitate is centrifuged, washed, dried, and ground to obtain anatase-type TiO with a cube shape. 2 Nanocrystalline.

[0098] Titanium dioxide nanocrystals prepared in this embodiment are scanned by electron microscope, and the results are as attached figure 2 shown by the attached figure 2 It can be seen from the SEM image that the TiO of this embodiment 2 Nanocrystals are generally...

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Abstract

The invention mainly aims to provide anatase type titanium dioxide nanocrystalline as well as a preparation method and application thereof. The preparation method comprises the following steps: 1) adding a morphology control agent and a titanium source into a solvent, and uniformly stirring to obtain a precursor solution, wherein the solvent at least comprises acetic acid, and the morphology control agent is selected from at least one of hexadecyl trimethyl ammonium bromide and hydrofluoric acid; 2) carrying out solvothermal reaction on the precursor solution at 150-220 DEG C for 12-72 hours,and performing centrifuging, washing, drying and grinding treatment to obtain the anatase titanium dioxide nanocrystal. The technical problem to be solved is how to generate a crystalline phase only through solvothermal reaction without high-temperature calcination, so that the hydrolysis process of the reaction is controlled, and titanium dioxide nanocrystals with various microstructures and sizes are obtained. The method is simple to operate, low in cost and high in yield, industrial popularization is very easy to realize, and meanwhile, the application range of the titanium dioxide nanocrystal is widened, so that the method is more practical.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to an anatase titanium dioxide nanocrystal and its preparation method and application. Background technique [0002] Semiconductor photocatalysts have attracted great attention due to the advantages of completely eliminating organic pollutants, and titanium dioxide nanocrystals are generally considered to be the best choice for energy and environmental purification materials because of their excellent photocatalytic activity, thermal stability, The advantages of chemical stability, environmental friendliness and low cost. These advantages of titanium dioxide originate from its unique physical and chemical properties, which are not only related to its crystal phase and particle size, but also closely related to its morphology. The size effect, surface effect, volume effect and other characteristics of the microscopic morphology of titanium dioxide nanoma...

Claims

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Application Information

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IPC IPC(8): C01G23/053H01L31/0352H01L31/032H01M4/48H01M10/0525B01J21/06B82Y40/00C30B29/16C30B29/68C30B7/14
CPCC01G23/053H01L31/032H01L31/0352H01M4/48H01M10/0525B82Y40/00B01J21/063C30B29/16C30B29/68C30B7/14C01P2004/03C01P2002/72C01P2004/32C01P2004/64C01P2004/38C01P2004/16B01J35/23B01J35/39Y02E60/10
Inventor 刘蕊蕊冀志江王静
Owner CHINA BUILDING MATERIALS ACAD
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