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A kind of preparation method of metal oxide catalyst

A technology of oxides and catalysts, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve problems such as limited catalytic oxidation effect of VOCs

Active Publication Date: 2022-07-15
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The catalytic active sites of a catalyst are directly related to its specific surface area, and a high specific surface area can provide more catalytic active sites. However, the metal oxides prepared by conventional synthesis methods are limited by their specific surface area, and their catalytic oxidation effect on VOCs is limited. , therefore, it is necessary to study a metal oxide catalyst with high specific surface area

Method used

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  • A kind of preparation method of metal oxide catalyst
  • A kind of preparation method of metal oxide catalyst
  • A kind of preparation method of metal oxide catalyst

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preparation example Construction

[0022] The preparation method of the metal oxide catalyst of the present application is described in further detail below. It does not limit the protection scope of this application, and its protection scope is defined by the claims. Certain disclosed specific details provide a thorough understanding of the various disclosed embodiments. However, one skilled in the relevant art will recognize that embodiments may be practiced without one or more of these specific details, but with other materials and the like.

[0023] Unless the context requires otherwise, in the description and claims, the terms "including" and "comprising" should be understood as an open-ended, inclusive meaning, that is, "including, but not limited to".

[0024] In the present specification, the numerical range represented by "numerical value A to numerical value B" means the range including the numerical values ​​A and B at the endpoints.

[0025] In this specification, the numerical range expressed usi...

Embodiment 1

[0075] Preparation of Hydrophobic Mesoporous Silica-Based Molecular Sieves with Large Specific Surface Area : Add 39.4g of absolute ethanol to 120g of deionized water and mix well, add 2.6g of cetyltrimethylammonium bromide (CTAB) and stir vigorously, then add 13.8g of concentrated ammonia (25% by mass), and finally 3.4 g of a mixture of phenyltriethoxysilane (PTES) and ethyl orthosilicate (TEOS) in a certain ratio (molar ratio, PTES:TEOS=1:5) was added dropwise, and vigorously stirred at 40°C for 2 hours Then it was transferred into the reaction kettle, crystallized at 100°C for 48h, washed and dried, and then calcined at 550°C for 6h. The resulting product is presented as figure 1 The XRD pattern of the typical MCM-48 molecular sieve has a three-dimensional ordered structure, and the low-temperature nitrogen adsorption-desorption isotherm is as follows figure 2 , showing a type IV isotherm with an H3 hysteresis loop, indicating that the synthesized sample is a highly ord...

Embodiment 2

[0077] The raw material ratio and technological process of this example are the same as those of Example 1, except that the silicon source is replaced with a mixture of TEOS and phenyltrimethylsilane and phenyltriethoxysilane, wherein the amount of TEOS added is 2.4g, 0.5g each of phenyltrimethylsilane and phenyltriethoxysilane. The final product powder appears similar to figure 1 The X-ray diffraction pattern of , the specific surface is 1528.3m 2 / g.

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Abstract

A metal oxide catalyst, comprising: mixing a metal salt solution, a mesoporous silicon-based MCM-48 molecular sieve, and anhydrous ethanol to obtain a mixed solution A; the mixed solution A is dried to obtain a solid substance A; the solid substance A, the metal salt solution , mixed with absolute ethanol to obtain a mixed solution B; the mixed solution B is dried to obtain a solid substance B; the solid substance B is washed with an alkaline solution and dried to obtain a metal oxide catalyst. The obtained catalyst has a high specific surface area transition metal oxide catalyst with la3d pore structure, and realizes the catalytic oxidation of volatile organic pollutants at a lower temperature.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method of a metal oxide catalyst with a high specific surface. It belongs to the field of environmental functional materials. Background technique [0002] Volatile organic compounds (VOCs), mainly including aliphatic hydrocarbons, aromatic hydrocarbons, aldehydes and ketones, alcohols, esters and halogenated hydrocarbons, etc., mainly from fine chemicals, petrochemicals, pharmaceuticals, auto maintenance, catering fume, printing and other industries . Most VOCs are toxic and cause great harm to human health and ecological environment. In addition, various industry standards and local standards have been promulgated one after another, and the increasingly stringent emission requirements have made the research and development of efficient VOCs treatment technology urgent. Commonly used VOCs treatment methods can be divided into two categories: destruction meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/03B01D53/86B01D53/44B01D53/72
CPCB01J29/0333B01J29/0341B01D53/864B01D53/8687B01J2229/186B01D2257/708B01D2257/7027
Inventor 唐晓龙庄瑞杰易红宏于庆君赵顺征高凤雨周远松刘俊高巍
Owner UNIV OF SCI & TECH BEIJING