Process for producing TiO2-Al2O3composite nano-powder body material
A tio2-al2o3, nano-powder technology, used in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problem of inhomogeneous particle size distribution, difficult particle size control, and expensive raw materials. problem, to achieve the effect of not easy to collapse, narrow pore size distribution, high specific surface area
Inactive Publication Date: 2010-06-09
SOUTHEAST UNIV
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Problems solved by technology
Solve the defects that the particle size of composite nanopowders at home and abroad is not easy to control, and the particle size distribution is not uniform enough. At the same time, it solves the difficulties of complicated experimental methods, expensive raw materials, and harsh reaction conditions.
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[0023] Preparation of TiO 2 -Al 2 o 3 Composite nano oxide powder:
[0024] First prepare a 0.3 mol / L dodecylamine hydrochloride aqueous solution, and adjust the pH value to 4, 4.6 or 5 at room temperature. Put isopropyl titanate, aluminum 2-isobutoxide, and acetylacetone in a molar ratio of 1:x:1, where x=1, 0.5, 0.25, 0.125, 0.0625, into a round bottom flask at 23, 25 or 26°C Constant temperature water bath, after magnetic stirring for 1 hour, 50 minutes or 70 minutes, add the prepared aqueous solution of dodecylamine hydrochloride into the round bottom flask and adjust the equimolarity of dodecylamine hydrochloride and titanate Add in a certain amount, 38 ℃, 40 ℃ or 42 ℃ constant temperature water bath, magnetic stirring for 20, 22 or 28 hours. Finally, the product was transferred to a hydrothermal tank for hydrothermal reaction at 75°C, 85°C or 80°C for 6, 7 or 8 days. Wash with isopropanol, centrifuge, and dry to obtain a powder product, which is TiO 2 -Al 2 o 3 C...
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Abstract
The invention relates to a preparation method for TiO2-Al2O3 composite nanometer powder materials, which comprises the following steps: preparing 0.1 to 0.5mol / L saline solution of dodecyl amine hydrochloric acid; adjusting the pH value to 4 to 5 ambient temperature; fully mixing two alkoxides of titanate and 2-isobutanol aluminum according to molar ratio of 1:1 to 1: 0.0625; adding acetyl acetonewith the same molar weight as the titanate; stirring and keeping the temperature at 23 to 26 DEG C for 50 to 70 minutes; adding the prepared saline solution of dodecyl amine hydrochloric acid with the same molar weight as the titanate; stirring and keeping the temperature at 38 to 42 DEG C for 20 to 28 hours; keeping the temperature at 75 to 85 DEG C for hydrothermal reaction for 6 to 8 days; washing with isopropanol; separating by means of centrifugal effect; drying to obtain TiO2-Al2O3 composite nanometer powder product. The powder particles prepared using the invention has the advantages of high specific surface area and narrow distribution of bore diameter and large bore size.
Description
technical field [0001] The present invention is a TiO 2 -Al 2 o 3 The preparation method of composite nanopowder material, especially using laurylamine hydrochloride (Laurylamine hydrochloride) as the structure directing agent in the sol-gel method to obtain composite nanoparticle with high specific surface area, narrow pore size distribution and large pore volume oxide powder. The invention belongs to the technical field of preparing nanometer oxides by chemical method. Background technique [0002] Composite nano-oxides based on nano-titanium dioxide are a very important class of functional materials, and have a wide range of applications in the fields of catalysis and photoelectric conversion materials. [0003] In terms of indoor decoration pollution treatment, in August 2003, the Department of Physics of the University of Science and Technology of China developed a composite nano-catalytic purification device based on nano-titanium dioxide. The use of composite nano...
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IPC IPC(8): B01J21/06B01J21/04
Inventor 孙岳明奚俊婷宋铂
Owner SOUTHEAST UNIV