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Cerium-copper binary composite oxide catalyst and preparation method thereof

A binary composite and oxide technology, applied in the field of catalysis, can solve the problems of anti-sintering to be improved, and achieve the effects of low price, high content of active components and large specific surface area

Active Publication Date: 2016-09-21
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the stability of composite metal oxides and the ability to resist sintering still need to be improved

Method used

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  • Cerium-copper binary composite oxide catalyst and preparation method thereof
  • Cerium-copper binary composite oxide catalyst and preparation method thereof

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preparation example Construction

[0025] The preparation method of cerium-copper binary composite oxide catalyst, concrete steps are as follows:

[0026] (1) Determine the general formula Ce of the cerium-copper binary composite oxide catalyst x Cu 1-x o 1+x The value of x in the middle, and the value range of x is 0.2~0.8, then weigh Ce(NO 3 ) 3 ·6H 2 O and Cu(NO 3 ) 2 ·3H 2 0, add deionized water to dissolve and obtain metal ion solution;

[0027] (2) According to the molar ratio Ce x Cu 1-x o 1+x :C 6 h 8 o 7 ·H 2 O: C 2 h 6 o 2 For the ratio of 5:10:1, weigh citric acid monohydrate C 6 h 8 o 7 ·H 2 O and glycol C 2 h 6 o 2 Add to the metal ion solution that step (1) makes, and stir and dissolve to obtain the solution, Ce in the solution x Cu 1-x o 1+x The molar concentration range of 0.05~0.2mol / L, the molar concentration range of citric acid monohydrate is 0.1~0.4mol / L, the concentration range of ethylene glycol is 0.01~0.04mol / L, and then the obtained solution is in the range o...

Embodiment 1

[0032] Weigh an appropriate amount of Ce(NO 3 ) 3 ·6H 2 O was dissolved in deionized water, and then according to the molar ratio Ce(NO 3 ) 3 ·6H 2 O: C 6 h 8 o 7 ·H 2 O: C 2 h 6 o 2 Add citric acid monohydrate C to the solution in a ratio of 5:10:1 6 h 8 o 7 ·H 2O and glycol C 2 h 6 o 2 , in the resulting solution Ce(NO 3 ) 3 ·6H 2 The molar concentration of O is 0.05mol / L, the molar concentration of citric acid is 0.1mol / L, and the molar concentration of ethylene glycol is 0.01mol / L. Heat and stir in a water bath at 70°C until evaporated, dry at 110°C for 12 hours, grind the mixture into a fine powder of about 200 mesh, heat to 300°C at a heating rate of 5°C / min, and pre-calcine in an air atmosphere After 1 hour, the furnace was cooled to room temperature; then the temperature was raised to 900° C. at a rate of 5° C. / min, calcined for 3 hours, and the furnace was cooled to room temperature to prepare a metal oxide catalyst.

Embodiment 2

[0034] Weigh an appropriate amount of Cu(NO 3 ) 2 ·3H 2 O was dissolved in deionized water, and then according to the molar ratio Cu(NO 3 ) 2 ·3H 2 O: C 6 h 8 o 7 ·H 2 O: C 2 h 6 o 2 Add citric acid monohydrate C to the solution in a ratio of 5:10:1 6 h 8 o 7 ·H 2 O and glycol C 2 h 6 o 2 , Cu(NO 3 ) 2 ·3H 2 The molar concentration of O is 0.05mol / L, the molar concentration of citric acid is 0.1mol / L, and the molar concentration of ethylene glycol is 0.01mol / L. Heat and stir in a water bath at 70°C until evaporated, dry at 110°C for 12 hours, grind the mixture into a fine powder of about 200 mesh, heat to 300°C at a heating rate of 5°C / min, and pre-calcine in an air atmosphere After 1 hour, the furnace was cooled to room temperature; then the temperature was raised to 900° C. at a rate of 5° C. / min, calcined for 3 hours, and the furnace was cooled to room temperature to prepare a metal oxide catalyst.

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Abstract

The invention relates to the technical field of catalysis and aims to provide a cerium-copper binary composite oxide catalyst and a preparation method thereof. The general formula of the cerium-copper binary composite oxide catalyst is: Ce x Cu 1‑x o 1+x , wherein, the value range of x is 0.2~0.8; the preparation method comprises the steps of: determining Ce x Cu 1‑x o 1 + x The value of x in, weigh Ce(NO 3 ) 3 ·6H 2 O, Cu(NO 3 ) 2 ·3H 2 O, C 6 h 8 o 7 ·H 2 O and C 2 h 6 o 2 , add deionized water to dissolve to obtain a solution, heat it in a water bath until it is evaporated to dryness to form a gel, dry the gel and grind it into a powder, heat up the powder and pre-fire it and then cool it in the furnace, then heat up the roasting furnace to cool it, and the cerium copper is prepared Binary composite oxide catalyst. The cerium-copper binary composite oxide catalyst in the invention has high content of active components, wide sources, low price, and strong deactivation resistance due to the interaction of cerium-copper oxides.

Description

technical field [0001] The invention relates to the technical field of catalysis, in particular to a cerium-copper binary composite oxide catalyst and a preparation method thereof. Background technique [0002] Oxygen is the most widely distributed in nature. It is not only used to supply humans, animals and plants for respiration, but also has very important applications in many aspects such as rocket propellants, aerospace and diving. With the development of science and technology, chemical oxygen sources are widely used by people, especially in propellant and diving. [0003] At present, most of the chemical oxygen sources used by people are sodium chlorate as a raw material, because the decomposition temperature of sodium chlorate is low, and it has advantages such as safety in use. Compared with perchlorate with higher oxygen content, such as lithium perchlorate There are fewer applications in this area, because the decomposition temperature of perchlorate is relativel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83C01B13/02C01D15/04
Inventor 张彦威周俊虎岑可法王智化刘建忠周志军黄镇宇杨卫娟程军
Owner ZHEJIANG UNIV
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