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Three-dimensionally ordered macroporous-mesoporous structure cerium-zirconium-aluminum composite oxide supported metal catalyst and preparation method thereof

A composite oxide, mesoporous structure technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve cheap and easily available raw materials, controllable specific surface area, The effect of good application prospects

Inactive Publication Date: 2017-09-15
YULIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] After investigation, we found that there is no report on the 3DOMacro-meso Al 2 o 3 Doped with Ce, Zr elements, improving its surface acidity and alkalinity and redox performance, and used as a catalyst carrier for the oxidation of VOCs

Method used

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  • Three-dimensionally ordered macroporous-mesoporous structure cerium-zirconium-aluminum composite oxide supported metal catalyst and preparation method thereof
  • Three-dimensionally ordered macroporous-mesoporous structure cerium-zirconium-aluminum composite oxide supported metal catalyst and preparation method thereof
  • Three-dimensionally ordered macroporous-mesoporous structure cerium-zirconium-aluminum composite oxide supported metal catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Preparation of Au / 3DOMacro-meso Ce 0.75 Zr 0.25 o 2 -Al 2 o 3 :

[0046] (i) with HAuCl 4 Prepare a 0.01mol / L precious metal solution for the precious metal source;

[0047] (ii) Dilute a certain stoichiometric noble metal solution with deionized water to 2.0×10-4 mol / L concentration, add a certain amount of PVA to the above precious metal solution in an ice-water bath, the Au / PVA mass ratio is 1.0:1.5, and stir vigorously for 10 minutes;

[0048] (iii) Quickly inject 0.1mol / L NaBH 4 Aqueous solution, Au / NaBH 4 The molar ratio was 1.0:5.0, and the sol was obtained after continuous stirring for 20 min;

[0049] (iv) According to the theoretical Au loading of 0.5wt%, a certain amount of 3DOMacro-meso Ce 0.75 Zr 0.25 o 2 -Al 2 o 3 The composite oxide carrier was added to the sol, and the obtained suspension was treated with ultrasonic waves (60kHz) for 30s, and the N 2 The bubbling operation stirred the suspension system for 10 hours until the colloidal gold ...

Embodiment 2

[0052] Preparation of Pt / 3DOMacro-meso Ce 0.75 Zr 0.25 o 2 -Al 2 o 3 :

[0053] (i) with H 2 PtCl 6 Prepare a 0.01mol / L precious metal solution for the precious metal source;

[0054] (ii) Dilute a certain stoichiometric noble metal solution with deionized water to 2.0×10 -4 mol / L concentration, add a certain amount of PVA to the above precious metal solution in an ice-water bath, the mass ratio of Pt / PVA is 1.0:1.5, and stir vigorously for 10 minutes;

[0055] (iii) Quickly inject 0.1mol / L NaBH 4 Aqueous solution, Pt / NaBH 4 The molar ratio was 1.0:5.0, and the sol was obtained after continuous stirring for 20 min;

[0056] (iv) According to the theoretical Pt loading of 0.5wt%, a certain amount of 3DOMacro-meso Ce 0.75 Zr 0.25 o 2 -Al 2 o 3 The composite oxide carrier was added to the sol, and the obtained suspension was treated with ultrasonic waves (60kHz) for 30s, and the N 2 The bubbling operation stirred the suspension system for 10 hours until the colloi...

Embodiment 3

[0059] Preparation of AuPt 2 / 3DOMacro-meso Ce 0.75 Zr 0.25 o 2 -Al 2 o 3 :

[0060] (i) with HAuCl 4 、H 2 PtCl 6 Prepare a 0.01mol / L precious metal solution for the precious metal source;

[0061] (ii) Dilute a certain stoichiometric noble metal solution with deionized water to 2.0×10 -4 mol / L concentration, add a certain amount of PVA to the above precious metal solution in an ice-water bath, AuPt 2 / PVA mass ratio is 1.0:1.5, stir vigorously for 10min;

[0062] (iii) Quickly inject 0.1mol / L NaBH 4 Aqueous solution, AuPt 2 / NaBH 4 The molar ratio was 1.0:5.0, and the sol was obtained after continuous stirring for 20 min;

[0063] (iv) According to theory AuPt 2 The loading amount is 0.5wt%, and a certain amount of 3DOMacro-meso Ce 0.75 Zr 0.25 o 2 -Al 2 o 3 The composite oxide carrier was added to the sol, and the obtained suspension was treated with ultrasonic waves (60kHz) for 30s, and the N 2 The bubbling operation stirred the suspension system for 10...

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Abstract

The invention discloses a three-dimensionally ordered macroporous-mesoporous structure cerium-zirconium-aluminum composite oxide supported metal catalyst and a preparation method thereof; the three-dimensionally ordered macroporous-mesoporous structure cerium-zirconium-aluminum composite oxide supported metal catalyst comprises a Ce0.75Zr0.25O2-Al2O3 composite oxide support of three-dimensionally ordered macroporous-mesoporous structure, metal M nanoparticles are supported on the pore walls of the support, and noble metal M is one or any of Au, Pt and AuPt2. The three-dimensionally ordered macroporous-mesoporous structure cerium-zirconium-aluminum composite oxide supported metal catalyst is a multilevel-pore nano catalyst, having high activity, good stability, good anti-poisoning property and low price. The three-dimensionally ordered macroporous-mesoporous structure cerium-zirconium-aluminum composite oxide supported metal catalyst is applicable to catalytic oxidation of multi-component VOCs (volatile organic compounds).

Description

technical field [0001] The invention relates to a three-dimensional ordered macropore-mesopore (3DOMacro-meso) structure cerium-zirconium-aluminum composite oxide (Ce 0.75 Zr 0.25 o 2 -Al 2 o 3 ) loaded metal M (M = Au, Pt, AuPt 2 ), especially a three-dimensional ordered macroporous-mesoporous structure cerium-zirconium-aluminum composite oxide-supported metal catalyst and a preparation method thereof. Background technique [0002] Volatile organic compounds (VOCs) have adverse effects on the environment and human health. More and more countries have set strict emission standards for VOCs emissions. VOCs emission control technologies at home and abroad can be divided into physical and chemical methods. Among them, catalytic oxidation method is recognized as one of the most effective means to eliminate VOCs. VOCs, and high purification efficiency, no secondary pollution and low energy consumption, and high-efficiency catalysts are the key to the realization of this pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/66B01D53/86B01D53/44B01D53/72
CPCB01D53/8668B01D53/8687B01J23/002B01J23/66B01D2257/7027B01D2257/708B01J2523/00B01J35/393B01J2523/31B01J2523/3712B01J2523/48
Inventor 杨黄根陈渊朱立刚覃利琴陶萍芳
Owner YULIN NORMAL UNIVERSITY
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