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One-dimensional zinc oxide nanometer material and preparation method thereof

A technology of zinc oxide nanometer and sodium hydroxide, applied in nanostructure manufacturing, zinc oxide/zinc hydroxide, nanotechnology, etc., can solve the problems of cumbersome pretreatment, long reaction time, high reaction temperature, etc. Easy-to-obtain, easy-to-follow effects

Inactive Publication Date: 2009-12-02
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The one-dimensional crystals prepared by this method have relatively large length and diameter, but the pretreatment is more complicated, the reaction temperature is higher, and the reaction time is longer.

Method used

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  • One-dimensional zinc oxide nanometer material and preparation method thereof
  • One-dimensional zinc oxide nanometer material and preparation method thereof
  • One-dimensional zinc oxide nanometer material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A. ZnCl 2 Prepare a zinc salt solution with a concentration of 0.4 mol / L with deionized water, and take 20 ml and place it in a stirred reactor.

[0030] B. NaOH is prepared into a NaOH solution with a concentration of 2.0 mol / L with deionized water.

[0031] C. Under stirring, the NaOH solution is slowly added dropwise to the zinc salt solution until the molar ratio of zinc ions and hydroxide ions in the mixed solution is 1:7. After stirring for 15 minutes, add an appropriate amount of hexadecyltrimethylammonium bromide at a concentration of 3g per liter, stir and dissolve to obtain a reaction solution; seal the reactor, react at a temperature of 80°C for 5 hours, and cool to room temperature naturally. The product is filtered, washed with deionized water for 3 to 5 times, then washed with absolute ethanol for 3 to 5 times, and then dried naturally to obtain a one-dimensional zinc oxide nanometer material with good crystallinity.

[0032] The results of X-ray diffrac...

Embodiment 2

[0034] A. Adding Zn(NO 3 ) 2 Prepare a zinc salt solution with a concentration of 0.2 mol / L with deionized water, and take 20 ml and place it in a stirred reactor.

[0035] B. NaOH is prepared into a NaOH solution with a concentration of 1.0 mol / L with deionized water.

[0036] C. Under stirring, the NaOH solution is slowly added dropwise to the zinc salt solution until the molar ratio of zinc ions and hydroxide ions in the mixed solution is 1:6. After stirring for 20 minutes, add an appropriate amount of tetradecyltrimethylammonium bromide at a concentration of 2.4 g per liter, stir and dissolve to obtain a reaction solution; seal the reactor, react at a temperature of 90 ° C for 4 hours, and cool to room temperature naturally. The product is filtered, washed with deionized water for 3 to 5 times, then washed with absolute ethanol for 3 to 5 times, and then dried naturally to obtain a one-dimensional zinc oxide nanometer material with good crystallinity.

[0037] Scanning ...

Embodiment 3

[0039]A. ZnSO 4 Prepare a zinc salt solution with a concentration of 0.3 mol / L with deionized water, and take 20 ml and place it in a stirred reactor.

[0040] B. NaOH is prepared into a NaOH solution with a concentration of 2.4mol / L with deionized water.

[0041] C. Under stirring, the NaOH solution is slowly added dropwise to the zinc salt solution until the molar ratio of zinc ions and hydroxide ions in the mixed solution is 1:8. After stirring for 20 minutes, add an appropriate amount of cetyltrimethylammonium chloride (CTAC) at a concentration of 3.5 g per liter, stir and dissolve to obtain a reaction solution; seal the reactor, react at a temperature of 80 ° C for 6 hours, and cool naturally After reaching room temperature, the product is filtered, washed with deionized water for 3 to 5 times, and then washed with absolute ethanol for 3 to 5 times, and then dried naturally to obtain a one-dimensional zinc oxide nanomaterial with good crystallinity.

[0042] Scanning el...

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Abstract

The invention provides a one-dimensional zinc oxide nanometer material and a preparation method thereof. The method comprises the steps of: performing a hydro-thermal reaction of a zinc salt solution and a sodium hydroxide solution; and successfully obtaining the one-dimensional zinc oxide nanometer material with high crystallinity by adding a surfactant and controlling reaction conditions. The diameter of one-dimensional nanometer zinc oxide is between 100 and 300nm, and the length is between 1 and 6mu m. Compared with the prior method for preparing the one-dimensional nanometer zinc oxide, the method has the advantages of low cost, simple operation, low energy consumption, high crystallinity of products and the like. The nanometer zinc oxide material has excellent gas sensitivity on gas such as methane, carbon monoxide, nitrogen dioxide and the like, and is a good gas-sensitive material.

Description

[0001] Field [0002] The invention relates to a zinc oxide material and its preparation and application, in particular to a one-dimensional zinc oxide nanometer material and a preparation method thereof. The zinc oxide nanometer material has high gas-sensing performance and is a good gas-sensing material. Background technique [0003] As a semiconductor material with a band gap of 3.37eV and an electron excitation energy barrier of 60meV, zinc oxide is widely used in the production of gas-sensitive materials, photoelectric materials and catalytic materials. So far, most of the research results of nano-zinc oxide materials focus on the preparation and application of zero-dimensional and two-dimensional nano-zinc oxide. Like ordinary zinc oxide materials, nano-zinc oxide is applied to gas-sensing materials to change its resistance properties by absorbing target gases to meet the detection requirements. Zero-dimensional and two-dimensional zinc oxide materials exist in high tem...

Claims

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Application Information

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IPC IPC(8): C01G9/02B82B3/00
Inventor 李殿卿刘欣白守礼陈霭璠
Owner BEIJING UNIV OF CHEM TECH
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