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Preparation of sheet zinc oxide

A zinc oxide, flake technology, applied in the direction of zinc oxide/zinc hydroxide, can solve the problems of less ZnO and less attention to properties, and achieve the effects of low synthesis temperature, low price and high yield

Inactive Publication Date: 2009-02-25
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There have been many reports on the synthesis of ZnO nanomaterials and their application in gas sensors, but there are relatively few flaky ZnO. For example, An Daizong and Yin Qingrui reported a preparation method for synthesizing single-chip ZnO (seeing the Chinese patents whose publication numbers are CN1526857 and CN176327), and Zhan Jinhua et al. (seeing the Chinese patents whose publication number is CN101177296) have reported a preparation method of ZnO nanopowders with flaky porous structure, but graded flaky or porous Flake ZnO is still difficult to be directly synthesized by solution method and gas phase method, and its properties have received relatively little attention.

Method used

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  • Preparation of sheet zinc oxide
  • Preparation of sheet zinc oxide
  • Preparation of sheet zinc oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Weigh 1.84g of anhydrous zinc acetate and 50ml of glycerin, mix well, then heat at 300°C for 30min, take out, and cool naturally to room temperature.

[0024] 2) washing with distilled water, centrifuging several times, and drying to obtain a flaky glycerol zinc precursor.

[0025] 3) The above products were respectively placed in a muffle furnace, and heated at 400, 500, and 600° C. for 1 hour to obtain flaky ZnO products.

[0026] Perform XRD, SEM, TG, PL and other characterizations on the precursors and final products, and perform thermogravimetric analysis on the precursors (such as figure 1 ) found that at 370°C, the precursor began to decompose. XRD and SEM analysis (such as figure 2 and 3 ) It can be seen that the precursor is a flaky structure, and the XRD pattern of the sample is completely consistent with the XRD pattern of the standard zinc glycerol, indicating that the precursor is zinc glycerol. In the sample XRD, it can also be seen that the diffra...

Embodiment 2

[0031] 1) Weigh 0.37g of anhydrous zinc acetate and 10ml of glycerin, mix well, then heat at 350°C for 1h, take out, and cool naturally to room temperature.

[0032] 2) washing with distilled water, centrifuging several times, and drying to obtain a flaky glycerol zinc precursor.

[0033] 3) Take the above products and place them in a muffle furnace, and heat them at 400, 500, and 600° C. for 1 hour, and the flaky ZnO products can also be obtained.

Embodiment 3

[0035] 1) Weigh 1g of anhydrous zinc acetate and 10ml of glycerin, mix well, then heat at 350°C for 1 hour, take it out, and let it cool down to room temperature naturally.

[0036] 2) washing with distilled water, centrifuging several times, and drying to obtain a flaky glycerol zinc precursor.

[0037] 3) Take the above products and place them in a muffle furnace, and heat them at 400, 500, and 600° C. for 1 hour, and the flaky ZnO products can also be obtained.

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Abstract

A method for preparing a sheet zinc oxide relates to a zinc oxide, in particular to a method for preparing a sheet zinc oxide nano material with a hierarchical structure. The sheet structure has higher sensitivity to ethanol gas. The method for preparing the sheet zinc oxide with high gas sensitivity is provided. Acetic anhydride is dispersed into glycerol, and then put in a long quartz tube, wherein, the ratio of the mass of the acetic anhydride to the volume of the glycerin is less than 1 / 10; the long quartz tube is put in a tubular furnace for heating and then taken out for cooling to room temperature, then the quartz tube is washed with water, centrifuged and dried to obtain a sheet zinc glycerol precursor which is heated to obtain the sheet zinc oxide. The method has the advantages of wide raw material resources and low price, simple synthesis, simple and convenient operations without any expensive equipment, low-temperature synthesis, low energy consumption and high yield, no use of organic solvents which seriously affect the environment, and no toxic gas during the synthetic process and the method is suitable for large-scale production.

Description

technical field [0001] The invention relates to a zinc oxide, in particular to a preparation method of a sheet-like zinc oxide nanometer material with a hierarchical structure, and the sheet-like structure has higher sensitivity to ethanol gas. Background technique [0002] Gas sensor is an important part of sensor technology, it can convert external non-electrical signals into electrical signals, so as to achieve the purpose of automatic control. It is widely used to detect toxic, harmful, flammable and explosive gases, and is of great significance to production, life and environmental protection. [0003] ZnO is a wide bandgap oxide semiconductor, which can be used as a material for resistive gas sensors and has been widely used in gas sensors. ZnO material has a wide range of sources and is easy to prepare. Its melting point is 1973°C. Compared with other oxides, it has a higher melting point and better thermal stability in air, so it has better thermal stability and low...

Claims

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Application Information

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IPC IPC(8): C01G9/02
Inventor 谢兆雄何辉忠韩锡光匡勤郑兰荪
Owner XIAMEN UNIV
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