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Method for preparing three-dimensional nanometer structure titanium dioxide

A titanium dioxide, three-dimensional nanotechnology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., to achieve the effect of simple method, large specific surface area and fine grain size

Inactive Publication Date: 2006-07-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, despite the wide range of applications of titanium dioxide, the "nanoflower" structure of titanium dioxide has not yet appeared

Method used

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  • Method for preparing three-dimensional nanometer structure titanium dioxide
  • Method for preparing three-dimensional nanometer structure titanium dioxide
  • Method for preparing three-dimensional nanometer structure titanium dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Step 1 Prepare pickling solution

[0022] Mix hydrofluoric acid with a concentration of 55% by mass, nitric acid with a concentration of 65% by mass, and deionized water in a volume ratio of 1:3:6 to obtain a pickling solution.

[0023] Step 2 Surface cleaning of metal titanium plate

[0024] The size is 5×5×0.01(cm 3 ) The surface of the metal titanium plate is pickled with the above-mentioned mixed acid at a temperature of 60° C., and then cleaned with deionized water in ultrasonic waves.

[0025] Step 3 Prepare the reaction solution

[0026] Add 1.0 ml of nitric acid with a concentration of 63% (mass percentage) and 100 mg of hexamethylene tetraazol (purity>99.5% by mass) to 50 ml of 30% (mass percent) hydrogen peroxide solution in sequence to obtain a reaction solution.

[0027] Step 4 Reaction

[0028] Submerge the cleaned metal titanium plate in 50ml of reaction solution, and react at 80°C for 72 hours.

[0029] Step 5 heat treatment

[0030] The reacted tit...

Embodiment 2

[0034] Step 1 Prepare pickling solution

[0035] With embodiment 1.

[0036] Step 2 Surface cleaning of metal titanium plate

[0037] With embodiment 1.

[0038] Step 3 Prepare the reaction solution

[0039] Add 4.0 ml of nitric acid with a concentration of 63% (mass percentage) and 100 mg of hexamethylene tetraazol (purity > 99.5% by mass) to 50 ml of a 30% (mass percent) hydrogen peroxide solution to obtain a reaction solution.

[0040] Step 4 Reaction

[0041] Submerge the cleaned metal titanium plate in 50ml of reaction solution, and react at 60°C for 60 hours.

[0042] Step 5 heat treatment

[0043] The reacted titanium sheet was gently rinsed with deionized water, dried and placed in a muffle furnace at 500° C. for 0.5 hours.

[0044] Response result

[0045] The surface of the titanium plate is uniformly generated as Figure 5 The shown "nanoflower" structure titanium dioxide, "nanoflower" diameter of about 500 nanometers. Titanium dioxide with "nanoflower" str...

Embodiment 3

[0047] Step 1 Prepare pickling solution

[0048] Mix hydrofluoric acid with a concentration of 50% by mass, nitric acid with a concentration of 68% by mass, and deionized water in a volume ratio of 1:4:7 to obtain a pickling solution.

[0049] Step 2 Surface cleaning of metal titanium plate

[0050] With embodiment 1.

[0051] Step 3 Prepare the reaction solution

[0052] Add 2.0 ml of nitric acid with a concentration of 63% (mass percentage) and 100 mg of hexamethylene tetraazol (purity > 99.5% by mass) to 50 ml of 30% (mass percent) hydrogen peroxide solution in sequence to obtain a reaction solution.

[0053] Step 4 Reaction

[0054] With embodiment 1.

[0055] Step 5 heat treatment

[0056] With embodiment 1.

[0057] Response result

[0058] The surface of the titanium plate is uniformly generated as Figure 7 The shown "nanoflower" structure titanium dioxide, "nanoflower" diameter of about 500 nanometers. Before the heat treatment, the "nano flower" structure ti...

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Abstract

The disclosed preparation method for TiO2 with three-dimension nano-flower structure comprises: preparing the acid pickling solution with HF, HNO3 and deionized water to clean the metal titanium plate surface; adding HNO3 and hexamethylenetetramine in H2O2 solution to obtain the reaction liquor to dip the plate and react for more than 48h at 60~80Deg; clearing the reacted titanium plate with deionized water, drying and holding for at least 10min at 300~500Deg. This product has well directed shape and crystallization, small size, and high specific surface area and purity. This invention is simple and practical and economical.

Description

technical field [0001] The invention relates to a method for preparing titanium dioxide with a three-dimensional nanoflower structure. Background technique [0002] Titanium dioxide film or powder with nanostructure, due to its fine grain size, high specific surface area, unique nano-size effect and other special properties, is widely used in high-tech applications such as photocatalysis, gas sensors, solar cells, biological materials and nano-devices. The field has a wide range of applications. At present, a variety of zero-dimensional and one-dimensional nanostructures of titanium dioxide have been developed and prepared, such as monodisperse spherical nanoparticles, nanowires, nanofibers, nanotubes, nanorods, etc. Three-dimensional nanostructure "nanoflowers" have been prepared in C, GaP, ZnO and some sulfides such as WS 2 、MoS 2 、 Bi 2 S 3 prepared in the system. These "nanoflower" structured materials show some unique and excellent physical and chemical properties...

Claims

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Application Information

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IPC IPC(8): C01G23/047
Inventor 吴进明
Owner ZHEJIANG UNIV
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