A kind of cerium-zirconium solid solution prepared by using biological template and its preparation method
A technology of cerium-zirconium solid solution and plant tissue, which is applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problem that cerium-zirconium solid solution methods have never been reported, affect cigarette smoking quality, and blending ratio Low-level problems, to achieve good economic and social benefits, high ignition activity, and stable performance
Active Publication Date: 2018-06-22
CHINA TOBACCO YUNNAN IND
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Problems solved by technology
In the articles published by Li Jian and others (Guangxi Light Industry, 2009, (2): 46-47), the cell wall substances in tobacco stems, including cellulose, hemicellulose, lignin and pectin, etc. More low-level aldehydes, catechols, alkyl catechols, and methanol are produced, which seriously affect the smoking quality of cigarettes, resulting in a relatively low blending ratio of cut stems in cigarette formula in China, resulting in idle cigarettes Large waste of stems
[0007] The method of preparing cerium-zirconium solid solution with biological template has never been reported
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Embodiment 1
[0036] A method for preparing a cerium-zirconium solid solution using a biological template, comprising the following steps:
[0037] (1) Cut the tobacco plant stalks after just baking into shredded stems, get 10g and soak them in 5% HCl for 2 days, then dehydrate through dehydrated ethanol gradient, use 15g precursor solution (wherein the molar ratio Ce(NO) in a beaker 3 ) 3 :ZrO(NO 3 ) 2 :ammonia water=0.5:0.5:4, just dissolved in water) mixed and soaked for 3 days.
[0038] (2) Filtration to obtain cut stems doped with cerium-zirconium solid solution, and drying in an oven at 90° C. for one day to obtain the initial solid product.
[0039] (3) The obtained solid product is put into a muffle furnace and calcined at a high temperature of 500° C. to obtain a cerium-zirconium solid solution.
[0040] The prepared cerium-zirconium solid solution has a porous structure with a specific surface area of 11.05 m 2 / g, the pore volume is 0.007cm 3 / g, the pore diameter is 4.86...
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Abstract
The present invention relates to a cerium-zirconium solid solution prepared by using a biological template, the microstructure of which is reproduced in morphology from the microstructure of plant tissues. The invention also relates to a method for preparing the cerium-zirconium solid solution, which comprises the following steps: (1) immersing plant tissue with hydrochloric acid, filtering and dehydrating to obtain a biological template; (2) preparing the biological body prepared in the step (1) The template is immersed in a precursor liquid, wherein the precursor liquid is an aqueous solution or an ethanol solution containing a cerium source, a zirconium source, and a precipitating agent; (3) filtering the mixture in the step (2), retaining the solid and drying it to obtain an initial solid product. (4) The solid product obtained in the step (3) is calcined at a high temperature to obtain a cerium-zirconium solid solution. The cerium-zirconium solid solution prepared by the invention is a green pollution-free, recyclable and recyclable, stable performance at high temperature, and has good economic and social benefits.
Description
technical field [0001] The invention belongs to the technical field of cerium-zirconium solid solution and preparation method thereof, and in particular relates to a high-activity cerium-zirconium solid solution catalyst prepared by using tobacco plants as biological templates and a preparation method thereof. Background technique [0002] A solid solution refers to a solid crystal in which atoms (compounds) of one (or several) components dissolve into the lattice of another component while still maintaining the lattice type of the other component. [0003] Cerium-zirconium solid solution plays an important role in the field of catalytic purification due to its good oxygen storage and release properties and thermal stability. The redox properties of cerium-zirconium solid solutions are closely related to the oxygen vacancy concentration, mobility of oxygen vacancies, surface area, and the formation of anion defects in cerium-zirconium solid solutions. In order to further im...
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IPC IPC(8): B01J23/10B01J35/02B01J35/00
Inventor 朱东来韩熠张伟巩效伟张霞李寿波王家强王伟和佼
Owner CHINA TOBACCO YUNNAN IND