Pd-based composite nano particle and preparation method thereof

A composite nanoparticle and nanoparticle technology, applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of limited modification of electrode conductivity and limited electron transmission distance

Active Publication Date: 2015-01-21
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limited electron transport distance in these composite nanostructures, the modification o

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Pd-based composite nano particle and preparation method thereof
  • Pd-based composite nano particle and preparation method thereof
  • Pd-based composite nano particle and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] reference figure 1 , The preparation method of Pd-based composite nanoparticles in one embodiment includes the following steps:

[0026] S10. Prepare a mixed solution containing copper salt and stabilizer.

[0027] The concentration of the copper salt is 0.0005 mol / L to 0.005 mol / L, and the molar ratio of the stabilizer to the copper salt is 1:1-10.

[0028] Preferably, the concentration of the stabilizer is 0.0001 mol / L to 0.05 mol / L.

[0029] The stabilizer can be citric acid, cetyltrimethylammonium bromide or polyvinylpyrrolidone.

[0030] The copper salt may be copper chloride or copper sulfate.

[0031] S20. After the mixed solution obtained in S10 is uniformly stirred at room temperature for 5min to 10min, the reducing agent is added to the mixed solution according to the molar ratio of the reducing agent to the copper ion of 1-100:1, and the palladium salt and the copper salt are followed The palladium salt solution is added to the palladium salt solution at a molar ratio ...

Example Embodiment

[0042] Example 1

[0043] 50mL of 0.0005mol / L copper chloride solution was added to a 100mL single-necked flask, and then polyvinylpyrrolidone was added. The concentration of polyvinylpyrrolidone in the solution was 0.001mol / L. After stirring for 5 minutes at room temperature, 0.02 mL wt 85% hydrazine hydrate was quickly poured into it. After the reaction for 10 minutes, the copper ions are fully reduced, and after the hydrazine hydrate is fully decomposed, 0.5mL 0.01mol / L palladium chloride solution is quickly injected into the synthesis solution; after keeping stirring for 10 minutes, the synthesis solution in the flask is deionized Water and ethanol are centrifuged, washed and vacuum dried to obtain Pd-based composite nanoparticles.

[0044] Such as figure 2 As shown, the Pd-based composite nanoparticles prepared in Example 1 have mesoporous nanostructures and rough surface nanostructures, and have uniform size, good monodispersity, and an average particle diameter of about 90...

Example Embodiment

[0050] Example 2

[0051] 50mL 0.001mol / L copper sulfate solution was added to a 100mL single-necked flask, and then polyvinylpyrrolidone was added. The concentration of polyvinylpyrrolidone in the solution was 0.004mol / L. After stirring for 5 minutes at room temperature, 0.05 mL of 85 wt% hydrazine hydrate was quickly poured into it. After the reaction for 10 minutes, the copper ions are fully reduced, and after the hydrazine hydrate is fully decomposed, 0.5mL 0.01mol / L palladium chloride solution is quickly injected into the synthesis solution; after keeping stirring for 10 minutes, the synthesis solution in the flask is deionized Water and ethanol are centrifuged, washed and dried in vacuum to obtain Pd modified Cu 2 O Nanoparticles.

[0052] Observation by electron microscope shows that the Pd-based composite nanoparticles prepared in Example 2 have mesoporous nanostructures and rough surface nanostructures, and have uniform size and good monodispersity, with an average partic...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Concentrationaaaaaaaaaa
Particle sizeaaaaaaaaaa
The average particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a Pd-based composite nano particle and a preparation method thereof. The preparation method comprises the following steps that a mixed solution containing copper salt and a stabilizing agent is prepared; after the mixed solution is stirred for five to ten minutes at an indoor temperature, a reducing agent is added according to the fact that the molar ratio of the reducing agent and copper ions is 1-100:1, after complete reaction, a palladium chloride solution is added according to the fact that the molar ratio of palladium chloride and the copper salt is 1:5-50, and stirring continues at the indoor temperature until complete reaction is achieved; the reaction solution is filtered, then filter slag is kept, and a Cu2O nano particle modified by Pd is obtained after the filter slag is washed and dried. According to the Cu2O nano particle modified by the Pd, the Pd is deposited on the surface of the Cu2O nano particle with a mesoporous structure, so that the electron and mass transmission of the Cu2O nano particle modified by the Pd is improved, the reactivity site of electrocatalysis is improved, and the Cu2O nano particle modified by the Pd has higher electrocatalysis performance compared with simple metallic oxide nano materials.

Description

technical field [0001] The invention relates to the field of nanometer materials, in particular to a Pd-based composite nanoparticle and a preparation method thereof. Background technique [0002] Diabetes is one of the major medical problems affecting the health of 150 million people worldwide. Therefore, sophisticated glucose sensors play a vital role in the early detection and cure of diabetes. Usually enzyme-based glucose sensors utilize the biocatalysts glucose dehydrogenase (GDH) and glucose oxidase (GO x ) for enzymatic electrochemical oxidation of glucose. Although this enzyme-based glucose sensor has high sensitivity, it also has some unavoidable shortcomings. Due to the inherent characteristics of biological enzymes, the long-term stability of the sensor is not enough. At the same time, biological enzymes have strict requirements on the environment and are easily affected by environmental factors, such as temperature, humidity and pH value. In addition, biolog...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B22F9/24B01J23/89B82Y40/00B82Y30/00
CPCB01J23/89B22F9/24
Inventor 符显珠郭瑛孙蓉
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap