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Preparation method of Co-Pt / Fe-Pt nanoparticle with adjustable composition

A nanoparticle, co-pt technology, applied in the field of preparation of Co-Pt/Fe-Pt nanoparticles, can solve problems such as difficulty in uniform deposition, and achieve the effects of simple process, excellent three-dimensional adhesion, and simple film thickness control.

Active Publication Date: 2019-09-27
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, a variety of methods have been used to prepare Fe-Pt / Co-Pt nanoparticles, including liquid phase reduction method, physical vapor deposition, electrochemical method, etc. There are greater difficulties in achieving uniform deposition on the surface

Method used

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  • Preparation method of Co-Pt / Fe-Pt nanoparticle with adjustable composition
  • Preparation method of Co-Pt / Fe-Pt nanoparticle with adjustable composition
  • Preparation method of Co-Pt / Fe-Pt nanoparticle with adjustable composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing Co-Pt nanoparticles with adjustable composition, comprising the following steps:

[0026] (1) ALD deposition of cobalt oxide film: using surface growth of 300 nm SiO 2 The silicon wafer was used as the substrate, and cobalt oxide was grown for 100, 200, and 300 cycles respectively, and the growth parameters were as follows:

[0027] Reaction chamber temperature: 250 o C;

[0028] Reaction source: cobaltocene (Co(Cp) 2 ) as the metal source, the source temperature is 85 o C, ozone as an oxygen source;

[0029] Pulse and cleaning time: metal source pulse is 1 s, high-purity nitrogen gas cleaning is 5 s; ozone pulse is 1.5 s; followed by high-purity nitrogen gas cleaning for 10 s to wash away reaction by-products and residual reaction sources;

[0030] (2) ALD deposition of metal platinum: continue ALD deposition of metal platinum on the substrate obtained in step (1) with cobalt oxide, and grow 50, 100, 150, 200 cycles of metal platinum. The AL...

Embodiment 2

[0039] A method for preparing Co-Pt nanoparticles with adjustable composition, comprising the following steps:

[0040] (1) ALD deposition of cobalt oxide thin film: use cleaned carbon fiber paper as the substrate, and grow cobalt oxide for 100 cycles. The growth parameters are as follows:

[0041] Reaction chamber temperature: 250 o C;

[0042] Reaction source: cobaltocene (Co(Cp) 2 ) as the metal source, the source temperature is 85 o C, ozone as an oxygen source;

[0043] Pulse and cleaning time: metal source pulse is 5 s, high-purity nitrogen gas cleaning is 20 s; ozone pulse is 5 s; followed by high-purity nitrogen gas cleaning for 20 s to wash away reaction by-products and residual reaction sources.

[0044] (2) ALD deposition of metal platinum: continue ALD deposition of metal platinum on the substrate obtained in step (1) with cobalt oxide, and grow 100 cycles of metal platinum. The ALD growth parameters of platinum are as follows:

[0045] Reaction chamber temper...

Embodiment 3

[0052] A method for preparing Co-Pt nanoparticles with adjustable composition, comprising the following steps:

[0053] (1) ALD deposition of cobalt oxide film: use the cleaned AAO template as the substrate, and grow cobalt oxide for 50 cycles. The growth parameters are as follows:

[0054] Reaction chamber temperature: 400 o C;

[0055] Reaction source: cobaltocene (Co(Cp) 2 ) as the metal source, the source temperature is 85 o C, ozone as an oxygen source;

[0056] Pulse and cleaning time: metal source pulse is 3 s, high-purity nitrogen cleaning is 15 s; ozone pulse is 3 s; followed by high-purity nitrogen cleaning for 15 s, flushing away reaction by-products and residual reaction sources.

[0057] (2) ALD deposition of metal platinum: continue ALD deposition of metal platinum on the substrate obtained in step (1) with cobalt oxide, and grow 50 cycles of metal platinum. The ALD growth parameters of platinum are as follows:

[0058] Reaction chamber temperature: 400 o C...

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Abstract

The invention discloses a preparation method of a Co-Pt / Fe-Pt nanoparticle with adjustable composition, and belongs to the field of preparation of nano materials. The composition of a material can be accurately regulated and controlled by utilizing a film thickness control method which is simple in atomic layer deposition technology and changing the cycle number of ALD deposited cobalt oxide or ferric oxide and Pt; and the three-dimensional fitting property of the ALD is combined, so that uniform coating can be realized on a three-dimensional structural matrix; and the preparation method is simple in process and accurate and controllable in composition; and the obtained Co-Pt / Fe-Pt nanoparticle can be applied to the fields of high-density magnetic storage, electrocatalysis and the like. According to the preparation method of the Co-Pt / Fe-Pt nanoparticle with the adjustable composition, the cobalt oxide or the ferric oxide is firstly deposited on a substrate; then ALD deposition of platinum is carried out; zirconium oxide or the ferric oxide and the platinum are repeatedly deposited to obtain cobalt oxide or ferric oxide / platinum nano-laminated layer; and finally annealing treatment is carried out to obtain the Fe-Pt / Co-Pt nanoparticle with the adjustable composition.

Description

technical field [0001] The invention belongs to the field of nano material preparation, in particular to a method for preparing Co-Pt / Fe-Pt nano particles with adjustable composition. Background technique [0002] The material formed by the composite of two metals can often show better physical or chemical properties than the corresponding single metal material. This is because the composite of the two metal materials can make the original metal have certain changes in composition, structure and properties. changes, which can produce many properties different from that of any component metal. At the same time, the interaction between various component metals can produce some new properties. For example, the mechanical properties of the material can be improved through lattice distortion between bimetals, specific magnetic properties can be produced, and catalytic properties can be improved. Obtaining makes bimetallic alloy materials have broad application prospects in the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C16/455C23C16/40C23C16/18C23C16/56B82Y30/00B82Y40/00
CPCC23C16/45525C23C16/406C23C16/18C23C16/56B82Y30/00B82Y40/00
Inventor 曹燕强李爱东吴迪
Owner NANJING UNIV
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