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Method for preparing zinc oxide hollow spheres

A hollow sphere, zinc oxide technology, applied in the direction of zinc oxide/zinc hydroxide, can solve the problems of energy consumption, little research on the application of hollow spheres, time-consuming synthesis, etc. Effect

Inactive Publication Date: 2010-09-01
SUN YAT SEN UNIV
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Problems solved by technology

[0002] The preparation methods of zinc oxide hollow spheres mainly include hydrothermal method, template method (hard template agent or soft template agent), high-temperature vapor deposition method, etc., but its synthesis is time-consuming and energy-consuming, and there are few applications of hollow spheres.

Method used

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  • Method for preparing zinc oxide hollow spheres
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  • Method for preparing zinc oxide hollow spheres

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Embodiment

[0026] Zinc acetate, dimethyl sulfoxide and water were used as raw materials to synthesize graded zinc oxide hollow spheres by ultrasonic irradiation. Weigh 1.098g of zinc acetate into a 100ml beaker, add 47.5ml of dimethyl sulfoxide, and then add 2.5ml of water, put the probe of the ultrasonic cell disruptor into the beaker, and adjust its power to 300W, set the ultrasonic The mode is 8s, and the time is 1h. After the ultrasound is finished, the white precipitate is collected by centrifugation, and washed with water and alcohol for 3 times each. Dry at 60°C.

[0027] White powder after drying is directly used for XRD test, judges its crystalline form, the result finds that prepared zinc oxide is a wurtzite structure (see figure 1 ), observe its morphology with a scanning electron microscope, and measure its morphology and crystal structure with a transmission electron microscope ( figure 2 ), found that submicron-sized hierarchical ZnO hollow spheres were composed of nanop...

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Abstract

The invention discloses a method for preparing zinc oxide hollow spheres. The method of the invention is an ultrasonic method and comprises the following steps of: (1) dissolving a zinc salt in a mixed solvent of an organic solvent and water to perform an ultrasonic reaction; and (2) centrifugally separating the product of the reaction, washing the product by water and alcohol in turn and drying the product to obtain the zinc oxide hollow spheres. The method of the invention is simple, convenient, quick, high in repeatability; and the prepared zinc oxide hollow spheres can be widely used in fields of catalysis, chemical reaction carriers, medicament transport, cosmetics, paints, solar cells and the like. Dye-sensitized solar cells prepared by using the zinc oxide hollow spheres have the advantages of low cost, rich raw materials, toxicity and pollution elimination, partial material recovery and the like, have a great significance for environmental protection, and enjoy immerse advantages in large-scale industrial production.

Description

technical field [0001] The invention relates to the field of zinc oxide nanoparticles, in particular to a preparation method of zinc oxide hollow spheres. Background technique [0002] The preparation methods of zinc oxide hollow spheres mainly include hydrothermal method, template method (hard template agent or soft template agent), high-temperature vapor deposition method, etc., but its synthesis is time-consuming and energy-consuming, and there are few applications of hollow spheres. . [0003] As an efficient and convenient synthesis method, sonochemistry has been widely used to prepare nanomaterials with various morphologies. The "acoustic cavitation" effect produced by ultrasonic irradiation will produce an instantaneous high temperature of 5000K and high pressure (20MPa) and a cooling rate exceeding 1010K / S in a very short time and in a very small space around the cavitation bubble. Accompanied by strong shock waves, jets and photoelectric effects, this instantaneou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02
Inventor 匡代彬何春秀雷炳新苏成勇
Owner SUN YAT SEN UNIV
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