Preparation method and application of lanthanum ion-doped zinc oxide porous hollow sphere

A technology of lanthanum ions and zinc oxide, which is applied in the field of preparation of lanthanum ion-doped zinc oxide porous hollow spheres, can solve the problems that the material properties have not been fully exerted, and achieve the effects of low cost, simple process and large specific surface area.

Inactive Publication Date: 2012-01-18
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Claims
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Problems solved by technology

Currently commonly used methods for preparing zinc oxide, such as template method, sol-gel method, microemulsion method, etc., usually only use the outer surface of the material, and have not yet fully utilized the performance of the material. The zinc oxide porous hollow sphere proposed in this patent It is said that the inner and outer surfaces of the material can be fully utilized, and it is possible to improve the above-mentioned application performance of the material

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  • Preparation method and application of lanthanum ion-doped zinc oxide porous hollow sphere

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Embodiment

[0021] A kind of preparation method of lanthanum ion doped zinc oxide porous hollow sphere, with lanthanum nitrate La(NO 3 ) 3 , Hexamethylenetetramine (CH 2 ) 6 N 4 and zinc nitrate Zn(NO 3 ) 2 As a raw material, sodium citrate is used as a surfactant, prepared by co-precipitation reaction in water, and the steps are as follows:

[0022] 1) Dissolve 0.7g of hexamethylenetetramine in 200ml of deionized water, ultrasonically dissolve it completely, add 1.49g of zinc nitrate, and then weigh 0.065g of La(NO 3 ) 3 Add to the above solution, ultrasonic vibration for a period of time to make La(NO 3 ) 3 Completely dissolve, finally weigh 0.24g of sodium citrate and add to the above solution, until it dissolves completely;

[0023] 2) Put the mixed solution in a water bath at 95°C, react for 5 hours, and filter to obtain a white precipitate, then wash the precipitate with deionized water and absolute ethanol, filter, and dry in an oven at 60°C to obtain the mixed solution. ...

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Abstract

A preparation method of lanthanum ion-doped zinc oxide porous hollow spheres uses lanthanum nitrate, hexamethylene tetramine and zinc nitrate as raw materials, uses sodium citrate as a surfactant, and performs a coprecipitation reaction in water for preparation; the lanthanum ion-doped zinc oxide porous hollow spheres are used to prepare side-heating gas-sensitive elements, and the method for preparing a side-heating gas-sensitive element comprises the following steps: mixing and uniformly blending lanthanum ion-doped zinc oxide powder and terpineol to prepare slurry, coating the slurry on a ceramic tube surface, performing high-temperature sintering and aging. The advantages and positive effects of the invention are that: 1) compared with other methods, the preparation method of liquid doped La3+ nanometer ZnO porous hollow spheres is simple in process, and low in cost; 2) the method can obtain uniformly-distributed ZnO nanometer porous hollow spheres with large specific surface area; 3) when the material is used to prepare side-heating gas-sensitive elements, the porous structure allows gas to contact fully, and the material is widely applicable to gas monitoring of ethanol, formaldehyde, ammonia, hydrogen.

Description

technical field [0001] The invention belongs to the preparation of gas-sensitive materials, in particular to a preparation method and application of lanthanum ion-doped zinc oxide porous hollow spheres. Background technique [0002] Zinc oxide is an important wide-bandgap compound semiconductor, which has important application value in the fields of chemical sensors, piezoelectricity, photocatalysis, photoelectric conversion, blue-green light-emitting diodes and lasers. In the application process of chemical sensors, piezoelectricity, photocatalysis, and photoelectric conversion, increasing the specific surface area of ​​zinc oxide has always been an effective way to improve its performance. Currently commonly used methods for preparing zinc oxide, such as template method, sol-gel method, microemulsion method, etc., usually only use the outer surface of the material, and have not yet fully utilized the performance of the material. The zinc oxide porous hollow sphere proposed...

Claims

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Application Information

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IPC IPC(8): C01G9/02B82Y30/00B82Y40/00
Inventor 尹静别利剑孟帆何建群
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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