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Method for preparing Zn-doped SnO2 micropore nanophase materials

A nanomaterial and microporous technology, applied in tin oxide and other directions, can solve problems such as unfavorable industrial production, excessive synthesis time, and increase cost, and achieve the effects of easy large-scale industrial production, low cost, and short heating reaction.

Inactive Publication Date: 2009-01-07
CHINESE ACAD OF INSPECTION & QUARANTINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these current methods have a common shortcoming: the synthesis time is too long
This long heating time greatly improves the SnO 2 The cost of industrial production of nanomaterials is not conducive to large-scale industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Weigh tin tetrachloride, zinc chloride, hexadecyltrimethylammonium bromide, ethanolamine, and distilled water in a weight ratio of 6:2:20:100:500, mix them to form a colorless and transparent solution by magnetic stirring, and then This solution is transferred to the Teflon container, airtight, microwave heating to 160 ℃ for 10 minutes, after the product is washed with water and ethanol, centrifuged, dried, the product is subjected to powder X-ray diffraction (XRD), transmission electron microscope ( TEM) characterized as highly crystalline Zn-doped SnO 2 Microporous material, which is highly sensitive to ethanol, as measured by gas sensing properties.

Embodiment 2

[0038] Weigh tin (IV) sulfate, zinc acetate, hexadecyltrimethylammonium bromide, ethanolamine, and distilled water in a weight ratio of 10:3:40:200:600, mix them to become a colorless and transparent solution by magnetic stirring, and then This solution is transferred to the Teflon container, airtight, microwave heating to 200 ℃ for 15 minutes, after the product is washed with water and ethanol, centrifuged, dried, the product is subjected to powder X-ray diffraction (XRD), transmission electron microscope ( TEM) characterized as highly crystalline Zn-doped SnO 2 Microporous material, which is highly sensitive to ethanol, as measured by gas sensing properties.

Embodiment 3

[0040] Weigh tin (IV) nitrate, zinc chloride, hexadecyltrimethylammonium bromide, ethanolamine, and distilled water in a weight ratio of 15:3:30:150:600, and mix them to form a colorless and transparent solution by magnetic stirring. Then the solution was transferred to a Teflon container, airtight, microwave heated to 180°C for 15 minutes, the product was washed with water and ethanol, centrifuged and dried, and the product was subjected to powder X-ray diffraction (XRD) and transmission electron microscopy (TEM) characterized as highly crystalline Zn-doped SnO 2 Microporous material, which is highly sensitive to ethanol, as measured by gas sensing properties.

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Abstract

The invention belongs to the chemical technical field, and provides a method for preparing a Zn-intermingled with SnO2 micro-pore nanometer material. The method comprises the steps of (a) blending uniformly 6-16 parts by weight of quadrivalence pink salt, 1-3 parts by weight of Zinc salt, 20-40 parts by weight of hexadecyl trimethyl ammonium bromide, 100-200 parts by weight of neovaricaine, and 500-600 parts by weight of distilled water; (b) placing a solution obtained through the step (a) into a high pressure-resistant teflon container; closing the container hemitically; heating with microwave to 160 to 200 DEG C; and reacting for 10-15 minutes; (c) washing a product obtained through the step (b); centrifuging; drying and obtaining the Zn-intermingled with SnO2 micro-pore nanometer material. The surface of the Zn-intermingled with SnO2 micro-pore nanometer material obtained through the method can reach 120m<2> / g, and the pore size thereof is 1.1nm. The method has the characteristics of short reaction time and easy large-scale industrialized production.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, in particular to a kind of Zn-doped SnO 2 Preparation methods of microporous nanomaterials. Background technique [0002] SnO 2 It is a very important wide-bandgap n-type semiconductor material (electronic bandgap is 3.6 eV), and has important application value in the preparation of high-performance optoelectronic devices, gas sensors, transparent semiconductor electrodes, catalysts and other fields. Studies in recent years have found that when SnO 2 The particle size was reduced to nanometers (10 -9 Many of its physical and chemical properties change accordingly. For example, nano-SnO 2 The gas sensitivity of the particle will increase by 100 times compared with its macroscopic material form, which greatly improves the detection sensitivity of various flammable, explosive and other dangerous gases. This qualitative change occurs due to the large increase in surface area of ​​the ...

Claims

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Application Information

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IPC IPC(8): C01G19/02
Inventor 席广成王星王超
Owner CHINESE ACAD OF INSPECTION & QUARANTINE
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