New method for preparing LaCoO3/SBA-16 and LaMnO3/SBA-16 catalyst

A technology of SBA-16 and catalyst, applied in the field of preparing LaCoO3/SBA-16 and LaMnO3/SBA-16 catalysts

Inactive Publication Date: 2012-01-04
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, no literature and patents have reported the preparation of loaded ABO described in this patent. 3 catalyst approach

Method used

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  • New method for preparing LaCoO3/SBA-16 and LaMnO3/SBA-16 catalyst
  • New method for preparing LaCoO3/SBA-16 and LaMnO3/SBA-16 catalyst
  • New method for preparing LaCoO3/SBA-16 and LaMnO3/SBA-16 catalyst

Examples

Experimental program
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Embodiment 1

[0015] Example 1: The specific preparation method of polyhedral ordered mesoporous SBA-16 (refer to patent ZL200710118755.1) is: at room temperature, add 1.2288gEO to 168mL hydrochloric acid (0.4mol / L) solution 106 PO 70 EO 106 and 0.0266g of hexadecyltrimethylammonium bromide, under strong stirring, add 4g of ethyl orthosilicate to the above solution and stir, transfer to an autoclave and heat at 95°C for 5 days, filter, After washing with deionized water, it was dried at 60 °C for 12 hours, then programmed in a muffle furnace to 550 °C at a rate of 1 °C / min and fired at 550 °C for 3 hours to obtain polyhedral ordered mesoporous SBA- 16, its specific surface area is 1010m 2 / g.

[0016] The carbonization treatment method of SBA-16 is: Weigh 1g of SBA-16, 1.2475g of sucrose and 5.9910mL of water in a beaker, stir and evaporate to dryness, then place in an oven and dry at 80°C and 180°C for 6h respectively. Dissolve 1.2475g of sucrose in 5.9910mL of water and add it to the ...

Embodiment 2

[0018] Embodiment 2: take by weighing 12.99g La(NO 3 ) 3 ·6H 2 O and 6.97mL g Mn(NO 3 ) 2 (50%) solution and 1.5507 g of citric acid were placed in a beaker, 8 mL of methanol was added, and after magnetic stirring for 2 h, a certain amount of deionized water was added to make the volume to 25 mL. The above mixture was poured into a beaker containing 0.3 g of the carbon-containing mesoporous SBA-16 of Example 1. Under ultrasonic radiation, the mixed solution was impregnated with carbon-containing mesoporous SBA-16 for about 5 hours and filtered, and the sample obtained was dried at room temperature for 12 hours, and then the sample was loaded into a magnetic boat in a tube furnace, N 2 Rise from room temperature to 700°C at a rate of 1°C / min in the atmosphere, and keep at 700°C for 4 hours, then drop to 50°C, change to air atmosphere, and rise from 50°C to 750°C at a rate of 1°C / min, And keep it at 750℃ for 4h to get LaMnO with mesoporous structure 3 / SBA-16 catalyst, whe...

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Abstract

The invention discloses a new method for preparing LaCoO3 / SBA-16 and LaMnO3 / SBA-16 catalyst, comprising the following steps: comprising the following steps: preparing carbon-containing mesoporous SBA-16; dissolving lanthanum nitrate and cobalt nitrate into ethylene glycol; adding the mixed liquor of methyl alcohol and the ethylene glycol to obtain lanthanum cobaltate precursor solution; or addingthe methyl alcohol and deionized water to lanthanum nitrate solution, manganous nitrate solution and citric acid solution to obtain the lanthanum manganate precursor solution; dipping the carbon-containing mesoporous SBA-16 by utilizing the above precursor solution at the ultrasound wave; drying and heating to 700 DEG C at the speed of 1 DEG C / min in nitrogen; keeping for 4h; cooling to 50 DEG C;switching into the air; and heating to 750 DEG C at the speed of 1 DEG C / min and keeping for 4h to obtain the LaCoO3 / SBA-16 and LaMnO3 / SBA-16 catalyst with a mesoporous structure. The new method of the invention has active components, is in a highly dispersed state and in a porous structure, and has excellent catalytic performance.

Description

technical field [0001] The invention relates to a method for preparing LaCoO 3 / SBA-16 and LaMnO 3 / A new method for SBA-16 catalysts, specifically a preparation of three-dimensional ordered mesoporous SBA-16 (silica) supported LaCoO 3 and LaMnO 3 A new approach to catalysts. Background technique [0002] Perovskite oxide (ABO 3 ) has attracted much attention as an oxidation catalyst and its application in thin film technology. certain ABOs 3 The activity for the oxidation reaction of volatile organic compounds is higher than that of platinum-containing catalysts. However, the bulk ABO prepared by traditional technology 3 The specific surface area is only a few m 2 / g, which greatly limits its wide application. Preparation of ABO with high specific surface area 3 Template method can be used. For example: Wang et al. used ordered mesoporous silica as a hard template to prepare LaCoO with ordered mesoporous structure. 3 , the specific surface area is 97m 2 / g, it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/03B01J35/10
Inventor 戴洪兴袁静刘雨溪吉科猛石凤娟
Owner BEIJING UNIV OF TECH
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