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Method for preparing hollow zinc oxide microspheres

A zinc oxide and hollow technology, applied in the direction of zinc oxide/zinc hydroxide, etc., can solve the problems of complex post-treatment process, long reaction cycle, high cost, etc., and achieve the effect of low price, mild conditions, simple and convenient operation

Inactive Publication Date: 2010-11-10
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The thermal evaporation method generally requires special equipment, high temperature (usually >500°C) and vacuum conditions, while the template method usually requires complex procedures, such as preparing templates, introducing surface functional groups, depositing target products, and removing templates. Leads to high cost, low yield, long reaction cycle and complex post-processing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 3mmol Zn(NO 3 ) 2 ·6H 2 O was placed in a 250mL round bottom flask, added 200mL of distilled water, stirred to dissolve, added 0.5mmol of sodium citrate, stirred thoroughly and then added 30mL of ammonia water, a white precipitate appeared in the solution and disappeared immediately, and the flask was placed in an oil bath and heated to 120 °C stirring and reflux for 12h. The resulting white precipitate was centrifuged, washed thoroughly with deionized water, and dried in air to obtain zinc oxide hollow microspheres.

Embodiment 2

[0024] Weigh 3mmol Zn(NO 3 ) 2 ·6H 2 Put O in a 250mL round bottom flask, add 200mL of distilled water, stir to dissolve, add 1mmol of sodium citrate, stir well and add 30mL of ammonia water, a white precipitate will appear in the solution and disappear immediately, put the flask in an oil bath and heat to 180°C Stir and reflux for 12h. The resulting white precipitate was centrifuged, washed thoroughly with deionized water, and dried in air to obtain zinc oxide hollow microspheres.

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Abstract

The invention discloses a method for preparing zinc oxide with a hollow structure. Sodium citrate is introduced into a preparation process, and nucleation and growth behaviors of zinc oxide crystals are regulated and controlled by using coordination or adsorption action between the sodium citrate and a polar surface of the zinc oxide so as to obtain single uniform hollow zinc oxide microspheres. The method has mild conditions and simple synthesis, does not need to add any template during preparation, and can realize large-scale preparation. The hollow zinc oxide microspheres prepared by the method are expected to be used in many fields of catalysts, sensors, flat displays, solar cells, luminous diodes and the like.

Description

technical field [0001] The invention belongs to the field of semiconductor inorganic materials, in particular to a method for preparing zinc oxide with a hollow structure. Background technique [0002] Zinc oxide (ZnO) has a band gap of 3.37eV at room temperature and is a typical direct wide bandgap semiconductor material. Due to the size effect, quantum confinement effect and surface effect, nano-zinc oxide has a series of excellent optical, electrical and magnetic properties. important application. In recent years, due to the discovery of nano-zinc oxide ultraviolet laser and its photoelectric, piezoelectric and other properties, its application range has been further broadened. Since the structure, shape and size of nanomaterials have important effects on the properties of materials and their applications, the research on the shape control of nano-zinc oxide has aroused great interest. So far, people have synthesized various ZnO nanostructures with different morphologi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02
Inventor 张俊彦岳珊珊
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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