Method for preparing Cu2O or CuO hollow submicrospheres with particle diameter controllable by water phase soft template method

A soft template method, hollow technology, applied in the direction of copper oxide/copper hydroxide, etc., can solve the problems of poor structure controllability, limited aggregate shape change mode, etc., and achieve low cost, easy operation and repeatability, and small particle size Effect

Inactive Publication Date: 2008-12-31
JIANGNAN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

However, a single surfactant system or a macromolecular system only acts as a stabilizer and dispersant in the reaction process, and has defects such as limited aggregate morphology change modes and poor structure controllability.

Method used

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  • Method for preparing Cu2O or CuO hollow submicrospheres with particle diameter controllable by water phase soft template method
  • Method for preparing Cu2O or CuO hollow submicrospheres with particle diameter controllable by water phase soft template method
  • Method for preparing Cu2O or CuO hollow submicrospheres with particle diameter controllable by water phase soft template method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Add a certain amount of sodium lauryl sulfate and polyvinylpyrrolidone to deionized water, heat to 40°C to fully dissolve and self-assemble into soft clusters, and mix with copper sulfate aqueous solution after the solution is cooled to room temperature, The final concentration ranges of each component in the solution are: copper sulfate 20mmol / L, SDS 45mmol / L, PVP 10g / L;

[0021] 2) The pH value of the mixed solution obtained in step 1) is adjusted to 12 with 2.5mol / L sodium hydroxide solution;

[0022] 3) Add the hydrazine hydrate aqueous solution with a mass concentration of 50% into the mixed solution obtained in step 2) under stirring conditions, so that the final molar ratio of copper ions and hydrazine hydrate is 1:20, and mix them uniformly at a constant temperature of 50 ° C. React in a water bath for 55 minutes to obtain orange-yellow Cu 2 O colloidal solution, after centrifugation to obtain a precipitate, the precipitate was washed with deionized water an...

Embodiment 2

[0026] 1) Add a certain amount of sodium lauryl sulfate and polyvinylpyrrolidone to deionized water, heat to 45°C to fully dissolve and self-assemble into soft clusters, and mix with copper nitrate aqueous solution after the solution is cooled to room temperature, The final concentration ranges of each component in the solution are: copper nitrate 15mmol / L, SDS 25mmol / L, PVP 10g / L;

[0027] 2) The pH value of the mixed solution obtained in step 1) is adjusted to 11 with 2.5mol / L sodium hydroxide solution;

[0028] 3) Add the hydrazine hydrate aqueous solution with a mass concentration of 50% into the mixed solution obtained in step 2) under stirring conditions, so that the final molar ratio of copper ions and hydrazine hydrate is 1:15, and mix it uniformly at a constant temperature of 50 ° C. React in a water bath for 55 minutes to obtain orange-yellow Cu 2 O colloidal solution, after centrifugation to obtain a precipitate, the precipitate was washed with deionized water and ...

Embodiment 3

[0031] 1) Add a certain amount of sodium lauryl sulfate and polyvinylpyrrolidone to deionized water, heat to 55°C to fully dissolve and self-assemble into soft clusters, and mix with copper acetate aqueous solution after the solution is cooled to room temperature, The final concentration ranges of each component in the solution are: copper acetate 15mmol / L, SDS 9mmol / L, PVP 8g / L;

[0032] 2) The pH value of the mixed solution obtained in step 1) is adjusted to 11 with 2.5mol / L sodium hydroxide solution;

[0033]3) Add the hydrazine hydrate aqueous solution with a mass concentration of 50% into the mixed solution obtained in step 2) under stirring conditions, so that the final molar ratio of copper ions and hydrazine hydrate is 1:15, and mix it uniformly at a constant temperature of 40 ° C. React in a water bath for 65 minutes to obtain orange-yellow Cu 2 O colloidal solution, after centrifugation to obtain a precipitate, the precipitate was washed with deionized water and abs...

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Abstract

The invention relates to a method for preparing Cu2O or CuO hollow submicron particles with controllable particle sizes by a water phase soft-template method, belonging to the technical field of the preparation of inorganic functional materials. In the invention, necklace-shaped soft matter clusters formed by sodium dodecyl sulfate and polyvinylpyrrolidone are taken as templates, cupric salt solution is added in soft clusters solution, after the pH value of the mixed solution is adjusted, hydrazine hydrate is taken as a reducing agent to quickly reduce copper ions by a one-pot method and assemble the copper ions into the Cu2O hollow submicron particles with controllable grain diameters and narrow particle size distribution; or further temperature programmed baking is carried out to oxidize the Cu2O hollow submicron particles to obtain CuO hollow submicron particles, the particle size and particle size distribution of which are similar to that of the Cu2O hollow submicron particles. The method of the invention has the advantages that: the products, Cu2O or CuO hollow submicron particles, have small particle sizes, narrow particle size distribution and good controllable property, the preparing technique is simple, the reaction at normal temperature and normal pressure is mild, the one-pot synthesis is easy to operate and repeat, and the method has low cost and is suitable for industrial production.

Description

technical field [0001] The invention relates to a kind of Cu with controllable particle size and narrow particle size distribution prepared by aqueous phase soft template method. 2 The invention relates to O hollow submicrospheres, or a method for preparing CuO hollow submicrospheres by further roasting them through temperature programming, and belongs to the technical field of preparation of inorganic functional materials. Background technique [0002] Cuprous oxide (Cu 2 O) is a P-type semiconductor with a bandgap of only 2.2eV. It has special optical, photoelectric and catalytic properties. It is widely used in the fields of sensors, catalysts, electronic components, antifouling coatings, electrode materials and colorants. Applications. As an important inorganic material, CuO has been widely used in catalysis, superconductivity, ceramics and other fields. It can be used as a catalyst or catalyst carrier and electrode active material, and also as a burn rate catalyst fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/02
Inventor 方云胡瑾任月萍夏咏梅
Owner JIANGNAN UNIV
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