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Flower-shaped TiO2 nanometer material with (001) surface outer surfaces and preparation method thereof

A technology of nanomaterials and outer surfaces, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc.

Inactive Publication Date: 2010-11-10
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In these methods, the prepared products are all decahedral structures composed of two truncated pyramids upside down, and recent studies have found that nanomaterials with layered structures are unique in their structure. Developing new properties of materials offers important avenues, but flower-like TiO with (001) faces is currently 2 Nanomaterials have not been reported so far

Method used

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  • Flower-shaped TiO2 nanometer material with (001) surface outer surfaces and preparation method thereof
  • Flower-shaped TiO2 nanometer material with (001) surface outer surfaces and preparation method thereof
  • Flower-shaped TiO2 nanometer material with (001) surface outer surfaces and preparation method thereof

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Embodiment 1

[0019] Weigh 0.1 g of titanium powder, put it into 40 ml of deionized water and 0.25 ml of hydrofluoric acid solution with a mass fraction of 40%, stir for 10 minutes, and then react at 160°C in a polytetrafluoroethylene-lined hydrothermal reactor 10 hours; after the reaction, the reaction product was washed with deionized water several times until the pH value reached 7; finally, the reaction product was baked in an oven at 80°C for 10 hours to dry the reaction product.

[0020] The product obtained in this example is a flower-like TiO with a (001) outer surface 2 nanomaterials.

[0021] figure 1 Shown is the flower-like TiO with (001) outer surface prepared in this example 2 SEM images and X-ray diffraction images of nanomaterials; figure 1 It can be seen from the scanning electron microscope image in a that the prepared flower-like TiO 2 The diameter of nanomaterials is 100nm to 500nm, and the pyramidal TiO 2 Nanocrystalline composition; figure 1 From the X-ray diffra...

Embodiment 2

[0023] Weigh 0.01g of titanium powder, put it into 5ml of deionized water and 0.05ml of hydrofluoric acid solution with a mass fraction of 40%, stir for 10 minutes, and then react at 200°C in a polytetrafluoroethylene-lined hydrothermal reactor 1 hour; after the reaction, the reaction product was washed with deionized water several times until the pH value reached 7; finally, the reaction product was baked in an oven at 100° C. for 5 hours to dry the reaction product.

[0024] The product obtained in this example is a flower-like TiO with a (001) outer surface 2 nanomaterials.

Embodiment 3

[0026] Weigh 1 gram of titanium powder, put it into 80ml of deionized water, 10ml of hydrofluoric acid solution with a mass fraction of 40%, stir for 10 minutes, and then react in a polytetrafluoroethylene-lined hydrothermal reactor at 100°C for 40 hours; after the reaction, the reaction product was washed with deionized water for several times until the pH value reached 7; finally, the reaction product was placed in an oven at 50° C. for 24 hours, and the reaction product was dried.

[0027]The product obtained in this example is a flower-like TiO with a (001) outer surface 2 nanomaterials.

[0028] image 3 Shown is the flower-like TiO with (001) outer surface prepared in this example 2 Scanning electron micrograph of nanomaterials; it can be seen from the scanning electron micrograph that the prepared flower-shaped TiO 2 The diameter of nanomaterials is 100nm-500nm, and the pyramidal TiO with multiple top surfaces as (001) planes 2 composed of nanocrystals.

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Abstract

The invention relates to a flower-shaped TiO2 nanometer material with (001) surface outer surfaces and a preparation method thereof. The TiO2 nanometer material has the diameter between 100nm and 500nm, has a flower-shaped structure, and consists of a plurality of cross top angle pyramid-shaped TiO2 nanometer crystals with the top surfaces of (001) surfaces. The method for preparing the TiO2 nanometer material with the (001) surface outer surfaces comprises the following steps: using titanium powder as raw materials for carrying out hydro-thermal reaction with diluted hydrofluoric acid solution at 100 to 200 DEG C; washing the products until the pH reaches 7 after the reaction is completed; and then, baking the products in a baking oven.

Description

technical field [0001] The invention relates to a titanium dioxide material and a preparation method thereof, in particular to a flower-like TiO with a (001) outer surface 2 Nanomaterials and their preparation methods. Background technique [0002] Titanium dioxide is a safe, non-toxic, chemically stable, and low-cost semiconductor oxide, which has a wide range of applications in the fields of photocatalysis, sewage treatment, and solar cells. [0003] The application of titanium dioxide is closely related to its morphology, crystal structure and surface properties. The study found that the (001) plane of anatase titanium dioxide has good chemical activity, but the surface energy of the (001) plane is relatively high, which is 0.90J / m 2 , while the surface energy of the (101) plane with the lowest surface energy is only 0.44J / m 2 , so usually the prepared titanium dioxide shows the (101) crystal plane orientation, so that it is difficult to prepare titanium dioxide with a...

Claims

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Application Information

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IPC IPC(8): C01G23/047C01G23/053
Inventor 刘敏王文静
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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