Method of preparing titanium dioxide nanotube with assistance of cationic surface active agent

A surfactant and titanium dioxide technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, nanotechnology, etc., to achieve high tube forming efficiency, increased tube length, and favorable application effects

Inactive Publication Date: 2013-09-11
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, surfactants have been used as soft templates to prepare nanomaterials such as nanorods and nanotubes, but it has not been reported that surfactants can help efficiently prepare titanium dioxide nanotubes.

Method used

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  • Method of preparing titanium dioxide nanotube with assistance of cationic surface active agent
  • Method of preparing titanium dioxide nanotube with assistance of cationic surface active agent
  • Method of preparing titanium dioxide nanotube with assistance of cationic surface active agent

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0022] Step 1: Prepare 10-50 mL of NaOH solution with a concentration of 8-15 mol / L and add it to the lining of the polytetrafluoroethylene reactor.

[0023] Step 2, weighing 0.1-10g of cetyltrimethylammonium bromide, 0.1-3g of titanium dioxide nanopowder with a particle size of 10-100nm and a crystal form of anatase phase, rutile phase or a mixture of the two, and adding Ultrasonic vibration in a good concentrated alkali solution to mix it evenly.

[0024] Step 3: Put the stainless steel reaction kettle into an oven for hydrothermal reaction at 100-200°C for 15-30h.

[0025] Step 4: After the hydrothermal reaction is completed, the supernatant is poured out, and the obtained solid powder is washed with water until neutral.

[0026] Step five, adding 0.1-1 mol / L nitric acid or hydrochloric acid to the obtained powder, and ultrasonicating at 50-100° C. for 1-3 hours.

[0027] In step six, the acid-treated sample is washed with water until it is nearly neutral.

[0028] Step ...

specific Embodiment approach 2

[0031] Configure 20mL NaOH solution with a concentration of 10mol / L and add it to the lining of the polytetrafluoroethylene reactor.

[0032] Weigh 0.5g of cetyltrimethylammonium bromide and 1g of anatase phase titanium dioxide powder with a particle size of 20nm, add it into the prepared concentrated alkali solution and ultrasonically oscillate to make them evenly mixed, and react in hydrothermal reaction at 120°C for 30h .

[0033] After the hydrothermal reaction is completed, the supernatant is poured out, and the obtained solid powder is washed with water until neutral.

[0034] Add 0.1 mol / L nitric acid to the obtained powder, and ultrasonicate at 60°C for 2h.

[0035] Wash the acid-treated powder with water until it is close to neutral, filter and fully dry.

[0036] The dried powder was ground and calcined at 400°C for 2h.

[0037] The titanium dioxide nanotubes can be efficiently prepared by using the above method.

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Abstract

The invention discloses a method of preparing a titanium dioxide nanotube with assistance of a cationic surface active agent. The method comprises: adding titanium dioxide powder and hexadecyl trimethyl ammonium bromide into a polytetrafluoroethylene hydrothermal reaction kettle filled with a strong base solution according to a weight ratio of 1:1-1:5, uniformly mixing the ingredients, reacting at 100-200 DEG C for 15-30hours, performing acid treatment, washing, filtering, drying and burning the ingredients to obtain the titanium dioxide nanotube. The titanium dioxide nanotube is efficiently prepared by a soft template combining with a hydrothermal method. The length of the prepared titanium dioxide nanotube is hundreds of nanometers, the outside diameter is about 10nm, the inside diameter is about 5nm, the titanium dioxide nanotube contains 2-5 layers of tube walls and two open ends. Compared with the titanium dioxide nanotube prepared by a common hydrothermal method under the same condition, the tube length is obviously increased, the tube diameter is more uniform, the draw ratio is large, the tube forming efficiency is high and the aggregation condition is alleviated, thereby being very beneficial for application of the titanium dioxide nanotube in various fields.

Description

technical field [0001] The invention relates to a method for preparing nanometer materials, in particular to a method for preparing titanium dioxide nanotubes. Background technique [0002] Titanium dioxide nanopowder is an important inorganic functional material, which has excellent characteristics such as non-toxic and harmless, high chemical stability, gas sensitivity, photoelectric conversion effect, and good catalytic activity. It is currently widely used in coatings, semiconductor components, catalysis, and solar energy. Batteries, gas sensors and other fields. [0003] Titanium dioxide nanotubes are another form of titanium dioxide. Due to their large specific surface area, higher adsorption capacity and significant size effect, they can further improve the photoelectric performance and catalytic activity of titanium dioxide, and have higher application value. [0004] There are three main methods for preparing titanium dioxide nanotubes: (1) anodic oxidation method,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/047B82Y40/00
Inventor 董国君孙逍寒李茹民
Owner HARBIN ENG UNIV
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