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Process for preparing titanium dioxide of hollow sphere structure

A technology of titanium dioxide and hollow spheres, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of limited development, complex post-processing technology, poor crystallinity, etc., and achieve simple equipment and process, wide application prospects, and good crystallinity Effect

Inactive Publication Date: 2008-07-09
EAST CHINA UNIV OF SCI & TECH
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Problems solved by technology

However, since these methods require complex post-treatment processes and poor crystallinity, their development is greatly limited.

Method used

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  • Process for preparing titanium dioxide of hollow sphere structure
  • Process for preparing titanium dioxide of hollow sphere structure

Examples

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Embodiment 1

[0020] TiCl 4 and triton in absolute ethanol (TiCl 4 Mass fraction is 18%, triton 6g, feed rate is 10ml / min), magnetic stirring 100min, is loaded into evaporator by nitrogen, nitrogen flow rate is 1.8m 3 / h, the temperature of the evaporator is controlled at 270°C, and after vaporization, it enters the combustion reactor through the central tube of the burner. Second ring air (2.0m 3 / h) and tricyclic hydrogen (0.2m 3 / h) form an auxiliary combustion flame, the hydrolysis reaction of the precursor is carried out in the combustion chamber, control the temperature of the gas at the outlet of the burner within the range of 120 ° C, so that the precursor condenses to form atomized steam, enters the combustion chamber and burns to undergo a hydrolysis reaction, and on the surface Under the action of an active agent, self-assembly occurs to form a nano-titanium dioxide hollow sphere structure, and the reaction temperature is 1800°C. The average particle size of the prepared nano-...

Embodiment 2

[0022] TiCl 4 and triton in absolute ethanol (TiCl 4 Mass fraction is 18%, triton 12g, feed rate is 9ml / min), magnetic stirring 30min, is loaded into evaporator by N2, nitrogen flow rate is 0.7m 3 / h, the temperature of the evaporator is controlled at 250°C, and after vaporization, it enters the combustion reactor through the central tube of the burner. Second ring air (3.0m 3 / h) and tricyclic hydrogen (0.2m 3 / h) form an auxiliary combustion flame, the hydrolysis reaction of the precursor is carried out in the combustion chamber, and the temperature of the gas at the outlet of the burner is controlled within the range of 100°C, so that the precursor is condensed to form atomized steam, which enters the combustion chamber and burns to undergo a hydrolysis reaction, and on the surface Under the action of an active agent, self-assembly occurs to form a nano-titanium dioxide hollow sphere structure. The reaction temperature is 1500°C. The average size of the prepared nano-tit...

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Abstract

The invention discloses a process for preparing nanometer titanium dioxide of hollow ball structure. Titanic chloride, surface activator and ethanol are mixed uniformly, stirred by magnetic force and carried into an evaporator to evaporate by carrier gas, then, enter a combustion reactor through a center tube of a burner for hydrolysis reaction in a combustion chamber with the reaction temperature between 1000-2500 DEG C and are self-assembled by the reaction of the surface activator, and the nanometer titanium oxide of hollow ball structure is generated at last. The titanium dioxide with shell-balloon structure is discharged and accumulated from the top of the combustion reactor, and tail gas is evacuated though HC1 absorbing tower. Simultaneously, air enters the combustion reactor from bicyclic ring, and hydrogen gas enters the combustion reactor from tricyclic ring. The invention combines the surface activator technique of fluid phase with the burning technique of gas phase, and the surface activator which controls the particle size of the final product in the range of nanometer plays an important role in the forming process of particles. The process for preparing nanometer titanium dioxide of hollow ball structure of the invention is simple in preparative technique and is easy to be in commercial process.

Description

technical field [0001] The invention relates to a method for preparing nano-titanium dioxide with a hollow sphere structure assisted by a gas phase self-assembly of a surfactant. Background technique [0002] Since the 21st century, exploring new nanostructures has become one of the research hotspots in the fields of materials, physics, and chemistry. As a new nanostructure, nanohollow spheres have an obvious feature that they have a large internal space and a shell with a thickness of nanoscale. Compared with bulk materials, they have many characteristics such as large specific surface area and low density. Therefore, the scope of application of hollow nanospheres continues to expand, and can be used as catalysts and drug carriers, lightweight structural materials, heat insulation, sound insulation and electrical insulation materials, pigments, etc., and has extremely broad prospects in basic research and practical applications. With the rapid development of nanotechnology...

Claims

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Application Information

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IPC IPC(8): C01G23/08
Inventor 李春忠刘杰胡彦杰
Owner EAST CHINA UNIV OF SCI & TECH
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