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A kind of cleaning method of polyvinyl pyrrolidone on the surface of nanometer ptpd alloy material

A technology of polyvinyl pyrrolidone and alloy materials, which is applied in the cleaning field of polyvinyl pyrrolidone (hereinafter referred to as PVP), can solve the problems of reducing the catalytic activity of nano-PtPd alloy materials, and achieve a simple and easy cleaning method, Good effect and improved electrochemical activity

Inactive Publication Date: 2016-06-08
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Problems solved by technology

Under heat treatment conditions, nanomaterials may be sintered, and oxide films will be formed on the surface of materials under ultraviolet light conditions, thereby reducing the catalytic activity of nano-PtPd alloy materials.

Method used

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  • A kind of cleaning method of polyvinyl pyrrolidone on the surface of nanometer ptpd alloy material

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Embodiment 1

[0026] A cleaning method of surfactant PVP on the surface of a nanometer PtPd alloy material, specifically comprising the steps of:

[0027] (1), preliminary cleaning

[0028] Get 6mg nano-PtPd alloy material, the nano-PtPd alloy material is washed successively with a mixture of acetone and ethanol that is 9000 times the quality of the nano-PtPd alloy material, and centrifuged four times to remove the PVP on the surface of the nano-PtPd alloy material;

[0029] The mixed solution composed of acetone and ethanol is calculated by volume ratio, that is, ethanol: acetone is 1:3;

[0030] (2), the nano-PtPd alloy material that has been preliminarily cleaned in step (1), at room temperature and under stirring conditions, add a mixture of sodium borohydride and tert-butylamine that is 3,500 times the mass of the nano-PtPd alloy material, and then clean and centrifuge again. , to remove the remaining PVP adsorbed on the surface of the nano-PtPd alloy material;

[0031] The mixed sol...

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Abstract

The invention brings forward a cleaning method for PVP on the surface of a nanometer PtPd alloy material. The method comprises the following steps: subjecting the nanometer PtPd alloy material to preliminary cleaning with a mixed liquid composed of acetone and ethanol; then cleaning the nanometer PtPd alloy material with a mixed liquid composed of sodium borohydride and tert-butylamine at normal temperature under stirring; and cleaning the nanometer PtPd alloy material with pure ethanol so as to obtain the nanometer PtPd alloy material with a clean surface. According to the cleaning method, since combined action of sodium borohydride and tert-butylamine is employed, PVP on the surface of the nanometer PtPd alloy material is rapidly and better removed, and the cleaned nanometer PtPd alloy material has obviously improved electrochemical activity. The cleaning method has the advantages of easiness, practicability, short cleaning time, no need for complex and expensive equipment, mild conditions, good effects and suitability for large scale operation.

Description

technical field [0001] The present invention relates to a new technology for quickly cleaning surfactants adsorbed on the surface of nano precious metals, in particular to a cleaning method for polyvinylpyrrolidone (PVP) on the surface of nano PtPd alloy materials. Materials Electrochemical properties of PtPd alloys. Background technique [0002] Due to their outstanding catalytic, electrical, magnetic and optical properties, noble metal nanoparticles have become the most dynamic sub-discipline in the field of nanotechnology and one of the most promising research hotspots. Driven by basic research and application exploration, researchers have discovered and improved the preparation methods of various noble metal nanomaterials. Controlling the size and morphology of noble metal nanoparticles has an important impact on their optical and catalytic properties. Surfactants (such as PVP) play an important role in controlling the size and morphology of synthetic noble metal nanoma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G5/036B22F1/00
Inventor 姚伟峰罗木华洪元琛王佩福
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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