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Preparation method of palladium-mesoporous silicon oxide hollow multi-core nanometer catalytic material

A technology of nano-catalytic materials and mesoporous silicon oxide, which can be applied to electrical components, battery electrodes, circuits, etc., and can solve problems such as synergistic template method and preparation of materials.

Active Publication Date: 2018-05-18
5ELEM HI TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, the palladium-coated mesoporous silica Pd@meso-SiO with hollow structure and multi-core 2 There are few reports on nanospheres, and none of them use the synergistic template method to prepare materials

Method used

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  • Preparation method of palladium-mesoporous silicon oxide hollow multi-core nanometer catalytic material
  • Preparation method of palladium-mesoporous silicon oxide hollow multi-core nanometer catalytic material
  • Preparation method of palladium-mesoporous silicon oxide hollow multi-core nanometer catalytic material

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Experimental program
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Effect test

Embodiment 1

[0021] (1) Weigh 0.05g CTAB and 0.125g F127, add a mixture of 10mL deionized water and 4mL absolute ethanol, stir at 30°C for 30 minutes, add 0.05mL 0.5M sodium hydroxide NaOH aqueous solution and continue stirring for 15 minutes;

[0022] (2) Add 0.10g resorcinol, stir for 30 minutes, add 0.15mL formaldehyde solution, stir the mixture at 30°C for 24 hours, then add 0.50mL0.1M sodium chloropalladate Na 2 PdCl 4 aqueous solution, and the solution was transferred to a polytetrafluoroethylene-lined stainless steel reactor, and reacted at 100°C for 24 hours;

[0023] (3) Centrifuge the product, wash it with water and ethanol, dry it overnight in an oven at 60°C, and grind it finely with an agate mortar to obtain Pd@RF nanospheres;

[0024] (4) Weigh 0.075g CTAB, add a mixture of 25mL deionized water and 10mL absolute ethanol, stir at 30°C for 15 minutes, add 1mL ethanol solution containing 0.05g Pd@RF beads, and ultrasonicate for 15 minutes to make Pd @RF beads are evenly disper...

Embodiment 2

[0029] (1) Weigh 0.025g CTAB and 0.50g F127, add a mixture of 10mL deionized water and 6mL absolute ethanol, stir at 50°C for 30 minutes, add 0.30mL 25wt% ammonia water and continue stirring for 30 minutes;

[0030] (2) Add 0.15g resorcinol, stir for 30 minutes, add 0.20mL formaldehyde solution, stir the mixture at 30°C for 24 hours, then add 0.75mL 0.1M palladium chloride PdCl 2 aqueous solution, and the solution was transferred to a polytetrafluoroethylene-lined stainless steel reactor, and reacted at 100°C for 24 hours;

[0031] (3) The product was centrifuged, washed with water and ethanol, dried overnight in an oven at 60°C, and ground with an agate mortar to obtain Pd@RF nanospheres. figure 2 It is the transmission electron microscope TEM picture of this nanomaterial;

[0032] (4) Weigh 0.125g CTAB, add a mixture of 25mL deionized water and 20mL absolute ethanol, stir at 50°C for 15 minutes, add 1mL ethanol solution containing 0.075g Pd@RF beads, and ultrasonicate for ...

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Abstract

The invention discloses a preparation method of a palladium-mesoporous silicon oxide hollow multi-core nanometer catalytic material. The preparation method comprises the steps of firstly, synthesizinga RF sphere in an alcohol-aqueous solution; secondly, preparing a multi-core palladium-coated resorcinol-formaldehyde resin (RdRF) nanometer sphere with a core-shell structure; thirdly, coating an upper mesoporous silicon oxide shell layer with the RdRF sphere to obtain a RdRF meso-SiO2 core-shell material with a dual-shell layer; and finally, removing the RF shell layer and a surfactant to obtain a multi-core Pdmeso-SiO2 nanometer sphere with a hollow structure. A synergic template method combining a hard template method and a flexible template method is employed, the palladium-mesoporous silicon oxide hollow multi-core nanometer catalytic material is obtained by an improved Stober method, a hydrothermal method, a sol-gel method and a roasting method, and the synthesis method also can beexpanded to prepare other previous metal and mesoporous silicon oxide hollow materials such as a composite material of Aumeso-SiO2 or Ptmeso-SiO2 having a hollow structure, and has important significance and value.

Description

technical field [0001] The invention belongs to the technical field of functional nano hollow materials, and in particular relates to a preparation method of a palladium-mesoporous silicon oxide hollow multi-core nano catalytic material. Background technique [0002] In recent years, a class of materials with a special "core@cavity@shell" structure, that is, hollow materials with cores, has attracted widespread attention due to the following advantages: (I) cores that can move freely in the middle Provides more exposed active sites, allowing them to react more efficiently with guest molecules, such as reactant molecules in catalytic reactions; (II) the outer shell prevents the agglomeration of adjacent cores; (III) between the core and the shell The cavity can provide a large space to load functional molecules, such as drug molecules. Due to the simultaneous presence of single or multiple freely movable cores, protective shells, and cavities between them, composite material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62
CPCH01M4/62Y02E60/10
Inventor 陈俊琛秦庆戊
Owner 5ELEM HI TECH CORP
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