Ultrathin self-assembly Pd nanometer wafer and synthetic method thereof

A self-assembly, nanosheet technology, applied in transportation and packaging, metal processing equipment, etc., to achieve uniform morphology, small environmental impact, and uniform dispersion.

Active Publication Date: 2016-04-06
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the Pd nanoparticles obtained by these prior arts are three-dimensional polyhedral structures or one-dimensional nanowires, while two-dimensional Pd nanostructures are less, and the colloidal solution of the obtained nanoparticles is gray-black.

Method used

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  • Ultrathin self-assembly Pd nanometer wafer and synthetic method thereof
  • Ultrathin self-assembly Pd nanometer wafer and synthetic method thereof
  • Ultrathin self-assembly Pd nanometer wafer and synthetic method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of synthetic method of ultrathin self-assembled Pd nano disc, the steps are as follows:

[0034] A, Potassium iodide and anhydrous sodium acetate are dissolved in water, obtain 2ml aqueous solution, be recorded as solution A;

[0035] B. Palladium acetylacetonate (Pd(acac) 2 ), PVP-K30 and N,N-dimethylformamide (DMF) were mixed uniformly in a conical flask to obtain 10ml of DMF solution, which was recorded as solution B;

[0036] C. Mix solution A and solution B in an ice bath and stir evenly. When the solution turns into a clear and uniform yellow solution, transfer the yellow solution into a three-necked flask and connect CO gas. The CO flow rate is controlled at 0.3mL sec -1 , at room temperature, the air in the bottle was discharged by stirring while ventilating the gas;

[0037] Pd(acac) in yellow solution 2 The concentration is 8.2mmol·L -1 , Pd(acac) 2 :PVP-K30:KI:NaAc molar ratio is 1:9:4:4;

[0038] D. After the air is exhausted, put the three-neck...

Embodiment 2

[0043] A kind of synthetic method of ultrathin self-assembled Pd nano disc, the steps are as follows:

[0044] A, Potassium iodide and anhydrous sodium acetate are dissolved in water, obtain 2ml aqueous solution, be recorded as solution A;

[0045] B. Palladium acetylacetonate (Pd(acac) 2 ), PVP-K30 and N,N-dimethylformamide (DMF) were mixed uniformly in a conical flask to obtain 10ml of DMF solution, which was recorded as solution B;

[0046] C. Mix solution A and solution B in an ice bath and stir evenly. When the solution turns into a clear and uniform yellow solution, transfer the yellow solution into a three-necked flask and connect CO gas. The CO flow rate is controlled at 0.3mL sec -1 , at room temperature, the air in the bottle was discharged by stirring while ventilating the gas;

[0047] Pd(acac) in yellow solution 2 The concentration is 8.2mmol·L -1 , Pd(acac) 2 :PVP-K30:KI:NaAc molar ratio is 1:18:4:4, that is, the amount of PVP-K30 is doubled, and the influen...

Embodiment 3

[0052] A kind of synthetic method of ultrathin self-assembled Pd nano disc, the steps are as follows:

[0053] A, Potassium iodide and anhydrous sodium acetate are dissolved in water, obtain 2ml aqueous solution, be recorded as solution A;

[0054] B. Palladium acetylacetonate (Pd(acac) 2 ), PVP-K30 and N,N-dimethylformamide (DMF) were mixed uniformly in a conical flask to obtain 10ml of DMF solution, which was recorded as solution B;

[0055] C. Mix solution A and solution B in an ice bath and stir evenly. When the solution turns into a clear and uniform yellow solution, transfer the yellow solution into a three-necked flask and connect CO gas. The CO flow rate is controlled at 0.3mL sec -1 , at room temperature, the air in the bottle was discharged by stirring while ventilating the gas;

[0056] Pd(acac) in yellow solution 2 The concentration is 8.2mmol·L -1 , Pd(acac) 2 :PVP-K30:KI:NaAc molar ratio is 1:9:6:6, that is, increase the amount of additives KI and NaAc, and ...

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Abstract

The invention belongs to the preparation technology and the catalytic field of nanometer materials, and particularly discloses a synthetic method of an ultrathin self-assembly Pd nanometer wafer. Palladium acetylacetonate is adopted as a precursor, N, N-dimethylformamide and water are adopted as a solvent, polyvinylpyrrolidone is adopted as a stabilization agent, carbon monoxide gas is adopted as a reducing agent, potassium iodide and anhydrous sodium acetate are adopted as a shape control agent, and the ultrathin self-assembly Pd nanometer wafer is obtained in a synthetic manner through an oil bath heating method. In a reaction system, the concentration of palladium acetylacetonate is 8.2 mmol.L<-1>, the molar ratio of palladium acetylacetonate to polyvinylpyrrolidone to potassium iodide to anhydrous sodium acetate is 1:9:4:4, the flow speed of CO is 0.3 mL.sec<-1>, a reaction is carried out in an oil bath of 100 DEG C for 3 h, and the ultrathin self-assembly Pd nanometer wafer is obtained. The synthetic method is simple, pollution is little, the obtained ultrathin self-assembly Pd nanometer wafer is uniform in shape and size, and the prepared ultrathin self-assembly Pd nanometer wafer can be applied to the fields of biological sensing, light conduction, electrochemistry and the like.

Description

technical field [0001] The invention relates to the technical field of novel nanomaterials and their preparation, in particular to an ultrathin self-assembled Pd nanodisk and a synthesis method thereof. Background technique [0002] Materials synthesis is at the heart of developments in the field of nanoscience. Controlling the particle size and morphology of nanomaterials is of great interest. For noble metal nanomaterials, they tend to have a polyhedral solid structure. The common structures are octahedron, cuboctahedron, cube, etc., which are formed by some low-index crystal planes such as {111}, {100}, {110} and other crystal planes. Coated, these low-index crystal faces provide a good platform for electrochemical reactions, and their surface atomic arrangement will affect the catalytic performance of nanomaterials. At present, there are the following types of nanoparticle catalysts. The first is metal nanoparticle catalysts, mainly noble metals, such as Pt, Rh, Au, Ag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00
CPCB22F9/24B22F1/054
Inventor 黄涛王欢李玫李金林
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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