Preparation method and application of 0D/1D/2D composite magnesium-aluminum bimetallic oxide nano catalytic 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 surface active sites of dimensional materials are easy to be covered and other problems, so as to achieve the effect of promoting the application of reduction performance, improving the catalytic ability of materials, and high catalytic efficiency.
Active Publication Date: 2020-11-10
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
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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 catalytic material, which comprises the following steps: proportionally dissolving MgCl2 and AlCl3 in water, adding a certain amount of urea, synthesizing a MgAl-LDH matrix by a solvothermal method, and carrying out high-temperature calcination on the material to obtain the MgAl-LDO material; putting the obtained MgAl-LDO into an ethanol solution of WCl6, and preparing a W-LDO multi-dimensional structure composite material by virtue of a solvothermal method and an alcoholysis method; taking a W-LDO sample as a carrier, adsorbing Pd2+ on the surface of the W-LDO sample, and obtaining the 0D/1D/2D composite structure Pd-W-LDO nano catalytic material with 0D Pd nano particles dispersed on the surface through a chemical reduction method. By regulating and controlling the surface characteristics of the multi-dimensional structure composite material, the small-size high-dispersion loading of the zero-dimensional nanoparticles is achieved, and the good environmental benefits and economic benefits are achieved.
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. ...
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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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