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Method for preparing high-specific surface area tin dioxide catalyst by using mesoporous silicon dioxide as hard template

A technology of mesoporous silica and high specific surface, applied in the field of environmental protection and air pollution control, can solve the problems of complex and cumbersome preparation process, cumbersome preparation process steps, waste of copper oxide resources, etc., and achieve wide source of materials and simple steps Easy to do, low cost effect

Active Publication Date: 2017-09-08
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent CN103978201 discloses a method for nano-silver modification of tin dioxide nanorods assisted by microwaves, but the tin dioxide nanorods involved are not prepared by microwave method
Chinese patent CN106058231 discloses a preparation method of tin dioxide nanocrystals embedded in three-dimensional hollow carbon spheres, but the preparation process is cumbersome and belongs to the technical field of secondary battery electrode materials
Chinese patent CN106219597 discloses a preparation method of mesoporous tin dioxide material, but its preparation process is complex and cumbersome, and it will cause waste of copper oxide resources and cause secondary pollution

Method used

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  • Method for preparing high-specific surface area tin dioxide catalyst by using mesoporous silicon dioxide as hard template
  • Method for preparing high-specific surface area tin dioxide catalyst by using mesoporous silicon dioxide as hard template
  • Method for preparing high-specific surface area tin dioxide catalyst by using mesoporous silicon dioxide as hard template

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Experimental program
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Effect test

Embodiment 1

[0025] 20 g SnCl 4 ·5H 2 O was dissolved in 400 mL deionized water and stirred for 30 minutes. Then 0.5 g of KCC-1 mesoporous silica was added and stirring was continued for 30 minutes. The above mixed solution was transferred to a quartz flask, and reacted for 30 minutes under the conditions of microwave power 800 W and stirring speed 600 r / min. The precipitate was washed by centrifugation with deionized water until the eluate TDS 2 - KCC-1-Stir catalyst. The specific surface area of ​​the catalyst was measured to be 352 m 2 / g.

Embodiment 2

[0027] 20 g SnCl 4 ·5H 2 O was dissolved in 400 mL deionized water and stirred for 30 minutes. Subsequently, 0.5 g of KCC-1 mesoporous silica was added and sonicated for 30 min. The above mixed solution was transferred to a quartz flask, and reacted for 30 minutes under the conditions of microwave power 800 W and ultrasonic power 500 W. The precipitate was washed by centrifugation with deionized water until the eluate TDS 2 - KCC-1-Ultra catalyst. The specific surface area of ​​the catalyst was measured to be 135 m 2 / g.

Embodiment 3

[0029] Take 1 g of Catalyst 1 and add it into an appropriate amount of 10 mol / L NaOH solution, and place it in a water bath at 70°C for 5 h under the condition of continuous magnetic stirring. The precipitate was washed by centrifugation with deionized water until the eluate TDS 2 - KCC-1-Stir-OH catalyst. The specific surface area of ​​the catalyst was measured to be 146 m 2 / g.

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Abstract

The invention discloses a method for preparing a high-specific surface area tin dioxide catalyst by using mesoporous silicon dioxide as a hard template. By a microwave method, the high-specific surface area tin dioxide catalyst is synthesized by using KCC-1 mesoporous silicon dioxide as the hard template. Under the conditions that the pressure is atmospheric pressure, reaction gas comprises methylbenzene with the concentration of 500-1000ppm, O2 (with the concentration of 20-40%) and N2 balance gas and the air speed is 20, 000mL / (gh), the esoporous silicon dioxide is used as the hard template and the catalyst is synthesized by the microwave method; the initial temperature of methylbenzene conversion is greatly reduced, and the SnO2-KCC-1-Ultra-OH catalyst can enable the methylbenzene conversion rate to reach 98% at 340 DEG C. By the microwave method for synthesizing the catalyst, steps are less, operation is simple and the synthesis time is greatly shortened, and a variety of used raw materials and a used solvent are environment-friendly, so that the method has a practical value.

Description

technical field [0001] The invention belongs to the fields of environmental protection and air pollution control, and relates to a catalyst for eliminating volatile organic compounds (VOCs). [0002] technical background [0003] VOC pollution mainly includes indoor and outdoor sources. The outdoor sources are mainly the exhaust gas emitted by vehicles, ships, and airplanes that are fueled by petroleum products, and the industrial processes that use coal, oil, and natural gas as fuels or raw materials; the indoor sources are mainly paints, additives or adhesives used for interior decoration. agent etc. Excessive concentration or variety of volatile organic compounds indoors can cause acute and chronic poisoning and seriously affect health; while outdoor volatile organic compounds can lead to the greenhouse effect and participate in the formation of smog and photochemical smog under light; most volatile organic compounds are flammable, Explosive, and halogenated volatile org...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/14B01J35/10B01J37/34B01J37/08B01J37/03B01D53/88B01D53/90B01D53/72
CPCB01D53/8668B01D53/885B01D53/90B01J23/002B01J23/14B01J37/031B01J37/08B01J37/343B01J37/346B01D2257/7027B01D2255/2094B01J35/393B01J35/23B01J35/613B01J35/615
Inventor 王翔刘雅倩刘洋徐香兰彭洪根
Owner NANCHANG UNIV
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