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A kind of preparation method of cezrk/rgo nano solid solution catalyst

A technology of solid solution and catalyst, which is applied in the field of preparation of CeZrK/rGO nano solid solution catalyst, which can solve the problems of danger, insufficient energy saving and environmental protection, and inability to handle graphene, etc., and achieve the effects of environmental friendliness, reduced difficulty and danger, and easy operation

Active Publication Date: 2021-02-26
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, graphene cannot be processed by this method, so it is difficult to prepare a cerium-zirconium nano-solid solution catalyst with graphene as a carrier.

Method used

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  • A kind of preparation method of cezrk/rgo nano solid solution catalyst
  • A kind of preparation method of cezrk/rgo nano solid solution catalyst
  • A kind of preparation method of cezrk/rgo nano solid solution catalyst

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Effect test

Embodiment 1

[0062] Such as figure 1 Shown, the preparation method of a kind of CeZrK / rGO nano solid solution catalyst of the present invention, concrete steps are as follows:

[0063] a. The hydrate of cerium nitrate, the hydrate of zirconyl nitrate and potassium nitrate (KNO 3 ) dissolved in deionized water to generate cerium-containing (Ce 4+ ) metal ions, zirconium (Zr 4+ ) metal ions and potassium (K + ) salt solutions of metal ions,

[0064] Cerium nitrate: potassium nitrate: zirconium nitrate=5:1:1=0.6mmol: 0.12mmol: 0.12mmol;

[0065] b. Then prepare graphene oxide, the mass ratio of graphene oxide to cerium ions is 5:1, then mix graphene oxide (GO) and deionized water, and generate graphene oxide (GO) after ultrasonic treatment for 0.5h ) solution;

[0066] c. Mix the two solutions prepared in steps a and b, and then sonicate for 0.5h;

[0067] d. Heating the mixed solution in step c for 1 h in a water bath; wherein, the heating temperature of the water bath is 80° C.;

[...

Embodiment 2

[0080] Such as figure 1 Shown, the preparation method of a kind of CeZrK / rGO nano solid solution catalyst of the present invention, concrete steps are as follows:

[0081] a. The hydrate of cerium nitrate, the hydrate of zirconyl nitrate and potassium nitrate (KNO 3 ) dissolved in deionized water to generate cerium-containing (Ce 4+ ) metal ions, zirconium (Zr 4+ ) metal ions and potassium (K + ) Salt solution of metal ions; cerium nitrate: potassium nitrate: zirconium nitrate=5:2:2=0.6mmol: 0.24mmol: 0.24mmol;

[0082] b. Then prepare graphene oxide, the mass ratio of graphene oxide to cerium ions is 5:1, then mix graphene oxide (GO) and deionized water, and generate graphene oxide (GO) after ultrasonic treatment for 0.5h ) solution;

[0083] c. Mix the two solutions prepared in steps a and b, and then sonicate for 0.5h;

[0084] d. Heating the mixed solution in step c for 1 h in a water bath; wherein, the heating temperature of the water bath is 75° C.;

[0085] e. ad...

Embodiment 3

[0095] Such as figure 1 Shown, the preparation method of a kind of CeZrK / rGO nano solid solution catalyst of the present invention, concrete steps are as follows:

[0096] a. The hydrate of cerium nitrate, the hydrate of zirconyl nitrate and potassium nitrate (KNO 3 ) dissolved in deionized water to generate cerium-containing (Ce 4+ ) metal ions, zirconium (Zr 4+ ) metal ions and potassium (K + ) Salt solution of metal ions, cerium nitrate: potassium nitrate: zirconium nitrate=5:3:3=0.6mmol: 0.36mmol: 0.36mmol;

[0097] b. Then prepare graphene oxide, the mass ratio of graphene oxide to cerium ions is 5:1, mix graphene oxide (GO) and deionized water, and generate graphene oxide (GO) after ultrasonic treatment for 0.5h solution;

[0098] c. Mix the two solutions prepared in steps a and b, and then sonicate for 0.5h;

[0099] d. Heat the mixed solution in step c in a water bath for 1 hour; wherein, the heating temperature of the water bath is 85°C

[0100] e. adding ammon...

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Abstract

The invention provides a method for preparing a CeZrK / rGO nanometer solid solution catalyst. The steps are to dissolve cerium nitrate, zirconyl nitrate and potassium nitrate in deionized water, then mix graphene oxide and deionized water, and then perform ultrasonic treatment; The prepared two solutions were mixed and then ultrasonically treated; the treated mixed solution was heated in a water bath; ammonium hydroxide was added to the heated solution until the solution reached pH 10±0.1; the obtained solution was subjected to hydrothermal treatment; Repeatedly centrifuging and washing the obtained solution with water until the pH value of the obtained solution is adjusted to neutral; freeze-drying the obtained solution to obtain a precursor; calcining the precursor obtained in step h in a tube furnace for 2 hours. The process of the invention is simple, easy to control and convenient for industrial production, and the final product CeZrK / rGO nano solid solution catalyst can simultaneously have the advantages of high oxygen content, large specific surface area and good thermal stability.

Description

technical field [0001] The invention specifically relates to a preparation method of a CeZrK / rGO nanometer solid solution catalyst. Background technique [0002] Diesel engines have been widely used in transportation and various non-road construction machinery, but their exhaust gas will cause serious environmental pollution. With the increasingly stringent emission regulations, the soot emission control technology of diesel engines has become the focus of governments and scholars in various countries. hot spot. [0003] Therefore, it is a good solution to use catalysts to reduce the oxidation reaction temperature of soot. Diesel engine catalytic particulate filter does not require additional heat source and complex control system, thus greatly reducing fuel consumption and engine loss. Due to the catalytic oxidation of soot is O 2 , the reaction between the soot and the catalyst, the contact area between the catalyst and the soot and the intrinsic catalytic activity of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/10B01J35/10B01J37/34B01J37/10B01J37/32B01D53/94
CPCB01J23/10B01J23/002B01J37/343B01J37/10B01J37/32B01D53/94B01J2523/00B01D2258/012B01J35/393B01J35/399B01J35/23B01J35/615B01J35/647B01J2523/13B01J2523/3712B01J2523/48
Inventor 李玉强吴钢
Owner CENT SOUTH UNIV
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