A preparation method and application of a 0d/1d/2d composite magnesium-aluminum double metal oxide nanocatalytic material

A technology of bimetallic oxides and nanocatalytic materials, which is applied in the preparation of metal/metal oxide/metal hydroxide catalysts, organic compounds, catalyst activation/preparation, etc. The active sites on the surface of dimensional materials are easily covered, so as to achieve the effect of improving the catalytic ability, low cost and high catalytic efficiency of the material.

Active Publication Date: 2021-06-22
FUZHOU UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a green and environment-friendly method for the preparation of 0D / 2D nano-composite materials, the lack of dispersion of zero-dimensional nanoparticles, and the easy coverage of active sites on the surface of two-dimensional materials. Strategies to prepare highly dispersed 0D / 2D nanocomposites Synthetic method

Method used

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  • A preparation method and application of a 0d/1d/2d composite magnesium-aluminum double metal oxide nanocatalytic material
  • A preparation method and application of a 0d/1d/2d composite magnesium-aluminum double metal oxide nanocatalytic material
  • A preparation method and application of a 0d/1d/2d composite magnesium-aluminum double metal oxide nanocatalytic material

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Embodiment 1

[0050] Preparation of Pd-W-LDO nanocatalytic materials:

[0051] (1) Add magnesium chloride hexahydrate (70 mmol) and aluminum chloride hexahydrate (35 mmol) with a molar ratio of Mg / Al=2:1 into 50 mL of deionized water, stir until completely dissolved to obtain magnesium-aluminum mixed salt solution. Then add urea (25 mmol) to the magnesium-aluminum mixed salt solution and stir until completely dissolved. Pour the obtained colorless and clear mixed solution into a polytetrafluoroethylene reactor liner with a capacity of 100 mL, then place the liner in the stainless steel shell of the reaction kettle to seal it, place it in an oven to keep warm, and set the temperature rise rate of the oven to be 5°C / min, the holding temperature was 120°C, the holding time was 24 h, then cooled to room temperature, the white precipitate at the bottom was taken out, collected by centrifugation, washed 4 times with deionized water, and placed in a freeze dryer at -53°C to freeze dry 12 h, obta...

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Abstract

The invention discloses a preparation method of a 0D / 1D / 2D composite magnesium-aluminum bimetallic oxide nano-catalyst material. Firstly, MgCl 2 , AlCl 3 Dissolve in water in proportion, then add a certain amount of urea, synthesize MgAl-LDH matrix by solvothermal method, and then calcinate the material at high temperature to obtain MgAl-LDO material. Place the resulting MgAl‑LDO in WCl 6 In the ethanol solution, the W-LDO multi-dimensional structure composite material was prepared by solvothermal alcoholysis again; the W-LDO sample was used as a carrier, and Pd was adsorbed on its surface 2+ A Pd-W-LDO nanocatalytic material with a 0D / 1D / 2D composite structure with 0D Pd nanoparticles dispersed on the surface was obtained by chemical reduction. The invention realizes the small size and highly dispersed loading of the zero-dimensional nano particles by regulating the surface characteristics of the multi-dimensional structure composite material, and has good environmental and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a preparation method and application of an 0D / 1D / 2D composite magnesium-aluminum double metal oxide nanocatalytic material. Background technique [0002] Two-dimensional materials have the characteristics of large specific surface area, many surface exposed atoms and easy surface modification, and have been widely studied in the field of catalysis. However, two-dimensional materials are easy to agglomerate during the synthesis or catalysis process, and the surface active sites are reduced, resulting in a decrease in material performance. At the same time, a single two-dimensional material has a single function and limited catalytic ability. Therefore, the construction of multidimensional nanocomposites, especially zero-dimensional / two-dimensional composite nanocatalytic materials is an important research direction of two-dimensional nanomaterials. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/652B01J37/03B01J37/32B01J37/08B01J37/10B01J37/16C07C213/02C07C215/76
CPCB01J23/002B01J23/6527B01J35/0013B01J35/006B01J35/0093B01J37/031B01J37/082B01J37/10B01J37/16B01J37/32B01J2523/00C07C213/02C07C215/76B01J2523/22B01J2523/31B01J2523/69
Inventor 于岩相军香庄赞勇
Owner FUZHOU UNIV
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