Method for preparing nanogold array with catalytic performance through rigid crosslinking

A catalytic performance, nano-gold technology, applied in the field of nano-gold arrays, can solve the problems of few application reports of two-dimensional nano-gold arrays, and achieve the effect of being beneficial to catalysis

Active Publication Date: 2019-09-20
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the interference of ligand entanglement factors, there are few reports on the application of two-dimensional gold nanoarrays in the field of catalysis.
Therefore, by designing the structure of the cross-linking agent and adjusting the assembly conditions, it is of great significance and challenges to effectively exert the catalytic function of the 2D gold nanoarrays.

Method used

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  • Method for preparing nanogold array with catalytic performance through rigid crosslinking
  • Method for preparing nanogold array with catalytic performance through rigid crosslinking
  • Method for preparing nanogold array with catalytic performance through rigid crosslinking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Preparation of nano-gold solution: add 10 mL of deionized water to a 50 mL volumetric flask, shake, then add 50 μL of tetrachloroauric acid solution with a concentration of 50 mmol / L and 200 μL of sodium borohydride solution with a concentration of 50 mmol / L, and shake , in a water bath for 5 minutes, add 10 g of acetone and shake well, then add 10 g of n-hexane and 0.1 μL of dodecanethiol, and let stand to react for 30 minutes.

[0035] (2) Self-assembly and thermal annealing of the gold nanoarray array: 100 μL of toluene was added dropwise on the Teflon tape, and the gold nanometer array solution mixed with toluene was uniformly dispersed on the droplet. After the hexane-toluene solution was evaporated in the atmosphere, an orderly and regularly stacked gold nano-array appeared. Nano-gold serial vacuum oven heating for 3 hours (70Pa pressure 80 ℃), cooling at room temperature.

[0036] (3) Reaction of nano-gold arrays with rigid cross-linking agent: Nitrogen gas ...

Embodiment 2

[0039] (1) Preparation of nano-gold solution: add 10 mL of deionized water to a 50 mL volumetric flask, shake, then add 50 μL of tetrachloroauric acid solution with a concentration of 50 mmol / L and 200 μL of sodium borohydride solution with a concentration of 50 mmol / L, and shake , water bath for 5 minutes, add 1 g of acetone and shake well, then add 1 g of n-hexane and 0.01 μL of dodecanethiol, and let stand for reaction for 30 minutes.

[0040] (2) Self-assembly and thermal annealing of the gold nanoarray array: 100 μL of toluene was added dropwise on the Teflon tape, and the gold nanometer array solution mixed with toluene was uniformly dispersed on the droplet. After the hexane-toluene solution was evaporated in the atmosphere, an orderly and regularly stacked gold nano-array appeared. Nano-gold serial vacuum oven heating for 3 hours (70Pa pressure 80 ℃), cooling at room temperature.

[0041] (3) Reaction of nano-gold arrays with rigid cross-linking agent: Nitrogen gas was ...

Embodiment 3

[0044] (1) Preparation of nano-gold solution: add 10 mL of deionized water to a 50 mL volumetric flask, shake, then add 50 μL of tetrachloroauric acid solution with a concentration of 50 mmol / L and 200 μL of sodium borohydride solution with a concentration of 50 mmol / L, and shake , in a water bath for 5 minutes, add 100 g of acetone and shake well, then add 100 g of n-hexane and 1 μL of dodecanethiol, and let stand to react for 30 minutes.

[0045] (2) Self-assembly and thermal annealing of the gold nanoarray array: 100 μL of toluene was added dropwise on the Teflon tape, and the gold nanometer array solution mixed with toluene was uniformly dispersed on the droplet. After the hexane-toluene solution was evaporated in the atmosphere, an orderly and regularly stacked gold nano-array appeared. Nano-gold serial vacuum oven heating for 3 hours (70Pa pressure 80 ℃), cooling at room temperature.

[0046] (3) Reaction of the nano-gold array with the rigid cross-linking agent: Nitrog...

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Abstract

The invention belongs to the technical field of organic material catalysis and in particular relates to a method for preparing a nanogold array with catalytic performance through rigid crosslinking. The method comprises the following steps: (1) preparing a nanogold solution, and carrying out liquid droplet evaporation; (2) carrying out self-assembling and thermal annealing of a nanogold array; (3) carrying out crosslinking on nanogold and a rigid ligand, and carrying out substrate transferring treatment; and (4) carrying out a cycloaddition reaction on carbon dioxide and an epoxy compound under catalysis of the nanogold array. By adopting the method provided by the invention, catalysis activity can be improved through a weak electron donor effect and steric hindrance of rigid groups, and a plurality of exposed gold catalysis sites can be provided by the rigid crosslinking nanogold array of a two-dimensional structure. The rigid crosslinking nanogold array can be a good catalyst for a carbon dioxide cycloaddition reaction at normal pressure, develops a new way for application of nanogold arrays, and also develops a new idea for designing of multi-phase catalysts.

Description

technical field [0001] The invention belongs to the technical field of organic material catalysis, and in particular relates to a method for preparing a nano-gold array with catalytic performance by adopting a rigid cross-linking-plasma cleaning method. Background technique [0002] Gold nanoarrays have attracted widespread attention due to their wide applications in optical devices, biosensors, chemical sensors, magnetic data storage, and so on. Gold nanoarrays also have potential applications in catalyzing certain oxidative hydrogenation reactions. [0003] To achieve the self-assembly of gold nanoarrays, various methods have been developed, including the Langmuir-Blodgett (LB) method, the layer-by-layer (LBL) method, the spin-coating method, and the droplet evaporation method. Wait. The self-assembly of nanoparticles into arrays is a delicate process, which usually requires ligands or crosslinkers to provide repulsion and spatial coherence, balance the attractive force ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/52B01J31/02B01J37/06B01J37/02B01J37/08B82Y40/00C07D317/36
CPCB01J23/52B01J31/0282B01J35/0013B01J37/0215B01J37/06B01J37/08B82Y40/00C07D317/36
Inventor 李雨浓徐启能常皓然
Owner NORTHEASTERN UNIV
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