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Preparation of fusiform anatase TiO2 nanocrystalline material

A nanocrystalline material and anatase technology, applied in the nanomaterials and nano fields, can solve the problem of few researches on special-shaped nanocrystalline materials, and achieve the effects of low cost, high controllability and high catalytic activity.

Inactive Publication Date: 2008-10-08
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still few studies on the synthesis of heteromorphic nanocrystalline materials using more abundant technical means.

Method used

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  • Preparation of fusiform anatase TiO2 nanocrystalline material
  • Preparation of fusiform anatase TiO2 nanocrystalline material
  • Preparation of fusiform anatase TiO2 nanocrystalline material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A spindle-shaped anatase TiO 2 The preparation method of nanocrystalline material, it comprises the steps:

[0023] 1) 3.33g of commercial TiO 2 The powder was placed in a sodium hydroxide solution with a volume of 100ml and a molar concentration of 10M and vigorously stirred for 36h to obtain a suspension solution A;

[0024] 2) The suspension solution A is hydrothermally reacted at a temperature of 180° C. for 48 hours by a hydrothermal method;

[0025] 3) Then dropwise add HCl solution with a concentration of 0.1M to adjust the pH value to 7.0, filter and dry at 80°C for 24 hours to obtain 3.91g of one-dimensional titanic acid (H 2 Ti 5 o 11 ·3H 2 O) nanotube material; {gained one-dimensional titanic acid (H 2 Ti 5 o 11 ·3H 2 O) The XRD pattern of the nanotube material is shown in figure 1 ; TEM photo, HRTEM photo of microstructure characterization, see Figure 2a , Figure 2b}

[0026] 4) 3.91g of the one-dimensional titanate nanotube material generated...

Embodiment 2

[0034] A spindle-shaped anatase TiO 2 The preparation method of nanocrystalline material, it comprises the steps:

[0035] 1) 3.33g of commercial TiO 2 The powder was placed in a sodium hydroxide solution with a volume of 100ml and a molar concentration of 2.01M and vigorously stirred for 30h to obtain a suspension solution A;

[0036] 2) The suspension solution A is hydrothermally reacted at a temperature of 160° C. for 48 hours by a hydrothermal method;

[0037] 3) Then dropwise add HCl solution with a concentration of 0.1M to adjust the pH value to 7.0, filter and dry at 80°C for 12 hours to obtain 3.91g of one-dimensional titanic acid (H 2 Ti 5 o 11 ·3H 2 O) nanotube material;

[0038] 4) 3.91g of the one-dimensional titanate nanotube material generated by the above reaction and distilled water were prepared into 100ml suspension solution B;

[0039] 5) The suspension solution B was hydrothermally reacted at a temperature of 160° C. for 48 hours by a hydrothermal me...

Embodiment 3

[0042] A spindle-shaped anatase TiO 2 The preparation method of nanocrystalline material, it comprises the steps:

[0043] 1) 3.33g of commercial TiO 2 The powder was placed in a sodium hydroxide solution with a volume of 100ml and a molar concentration of 19.09M and vigorously stirred for 50h to obtain a suspension solution A;

[0044] 2) The suspension solution A was hydrothermally reacted at a temperature of 220° C. for 7 days by a hydrothermal method;

[0045] 3) Then dropwise add HCl solution with a concentration of 0.1M to adjust the pH value to 7.0, filter and dry at 80°C for 24 hours to obtain 3.91g of one-dimensional titanic acid (H 2 Ti 5 o 11 ·3H 2 O) nanotube material;

[0046] 4) 3.91g of the one-dimensional titanate nanotube material generated by the above reaction and 100ml of distilled water were prepared into suspension solution B;

[0047] 5) The suspension solution B was hydrothermally reacted at a temperature of 220° C. for 7 days by a hydrothermal m...

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Abstract

The invention relates to a method for the production of an anatase fusiform TiO2 nano-crystalline material. The method for the production of the fusiform anatase TiO2 nano-crystalline material is characterized in that the method includes the following steps: 1) a TiO2 powder is positioned in a sodium hydroxide solution with the molar concentration ranging from larger than 2M to smaller than 20M and is agitated strongly for thirty to fifty hours to get a suspended solution A; 2) the suspended solution A experiences the hydrothermal reaction for more than forty eight hours at a temperature of between 160 to 220 DEG C by adopting a hydrothermal method; 3) then an HCl solution with the concentration of 0.1M is added thereto for adjusting the pH value to 7.0, and a single-crystalline titan acid nano-tube material is obtained after filtration and then being dried for twelve to twenty four hours at a temperature of 80 DEG C; 4) the single-crystalline titan acid nano-tube material generated by the above reaction is mixed with distilled water to prepare a suspended solution B; 5) the suspended solution B undertakes the hydrothermal reaction for more than forty eight hours at a temperature of between 160 and 220 DEG C by adopting the hydrothermal method; and 6) the fusiform anatase TiO2 nano-crystalline material is obtained after the filtration by deionized water and then being dried for twelve to twenty four hours at a temperature of 80 DEG C. The method has advantages of simple process, high degree of controllability and low cost.

Description

technical field [0001] The invention belongs to the field of nanomaterials and nanotechnology, in particular to an anatase spindle-shaped TiO 2 Preparation methods of nanocrystalline materials. Background technique [0002] In recent decades, nano-TiO 2 Particles have attracted much attention due to their wide application prospects in the fields of catalysis, photoelectric conversion, and functional ceramics. The morphology, structure, dimension, size and other factors of nanomaterials have a direct impact on their properties. Nano-TiO 2 The photoelectric and catalytic properties of particles are not only related to their size, but also affected by their morphology. Synthesis and control of the structure and morphology of micro- and nanoscale inorganic materials is an important research field in materials chemistry, which is very important and practical for a deep understanding of the basic properties of one-dimensional nanomaterials and exploration of potential applicat...

Claims

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Application Information

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IPC IPC(8): C01G23/047
Inventor 刘曰利陈文钟蕾舒威付帆李洪全周静
Owner WUHAN UNIV OF TECH
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