Check patentability & draft patents in minutes with Patsnap Eureka AI!

Nano composite selenide and preparation method thereof

A nano-composite, selenide technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of large-scale industrial production of electrocatalysts, harmful to human health, and reaction time to increase manufacturing costs And other issues

Inactive Publication Date: 2018-02-16
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF10 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to the strong toxicity of the raw materials used in this method, which is harmful to human health, and the preparation process of organometallic ZIF-67 takes a long time, the phases of cobalt selenide obtained by calcining at different temperatures are also different, resulting in electrolytic The performance of the catalyst is unstable; in addition, higher calcination temperature and longer reaction time will undoubtedly increase the manufacturing cost, which in turn limits the industrial production of electrocatalysts
To sum up, the current production of electrocatalysts requires high temperature and long reaction time (hours to days), and some preparation methods also need to use complex processes to synthesize organometallic frameworks, and these defects are not conducive to the development of electrocatalysts. Large-scale industrial production of electrocatalysts

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
  • Nano composite selenide and preparation method thereof
  • Nano composite selenide and preparation method thereof
  • Nano composite selenide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A preparation method of nanocomposite selenide, specifically comprising the following steps:

[0040] (1). Dissolve the graphene oxide powder in pure water, and after ultrasonic dispersion, make 70ml of graphene oxide dispersion with a concentration of 0.5mg / ml;

[0041] (2). Cobalt chloride is added in the above-mentioned graphene dispersion and fully stirred, then sodium citrate is added, after stirring, the ethanol solution of tin tetrachloride is added in the above-mentioned mixed solution, fully stirred;

[0042] (3). Add 14ml of sodium hydroxide solution with a concentration of 2M into the solution obtained in step (2), and carry out centrifugal washing after stirring for 1 hour;

[0043] (4). Dissolve the product obtained in step (3) in pure water and stir evenly to obtain a solution with a concentration of 6mg / ml in 80ml, then add 40ml of a concentration of 8M sodium hydroxide solution in the above solution, and stir after 15 minutes Perform centrifugal washing...

Embodiment 2

[0049] A preparation method of nanocomposite selenide, specifically comprising the following steps:

[0050] (1). Dissolve the graphene oxide powder in pure water, and ultrasonically disperse it to form a 70ml graphene oxide dispersion with a concentration of 2mg / ml;

[0051] (2). Cobalt chloride is added in the above-mentioned graphene dispersion and fully stirred, then sodium citrate is added, after stirring, the ethanol solution of tin tetrachloride is added in the above-mentioned mixed solution, fully stirred;

[0052] (3). Add 10ml of sodium hydroxide solution with a concentration of 3M into the solution obtained in step (2), and carry out centrifugal washing after stirring for 1 hour;

[0053] (4). Dissolve the product obtained in step (3) in pure water and stir evenly to obtain a solution with a concentration of 80ml of 8mg / ml, then add 40ml of a concentration of sodium hydroxide solution that is 8M in the above solution, and stir after 15 minutes Perform centrifugal w...

Embodiment 3

[0058] A preparation method of nanocomposite selenide, specifically comprising the following steps:

[0059] (1). Dissolve the graphene oxide powder in pure water, and ultrasonically disperse it to form a 70ml graphene oxide dispersion with a concentration of 1mg / ml;

[0060] (2). Cobalt chloride is added in the above-mentioned graphene dispersion and fully stirred, then sodium citrate is added, after stirring, the ethanol solution of tin tetrachloride is added in the above-mentioned mixed solution, fully stirred;

[0061] (3). Add 12ml of sodium hydroxide solution with a concentration of 4M into the solution obtained in step (2), and carry out centrifugal washing after stirring for 1 hour;

[0062] (4). Dissolve the product obtained in step (3) in pure water and stir evenly to obtain a solution with a concentration of 80ml of 8mg / ml, then add 40ml of a concentration of sodium hydroxide solution that is 8M in the above solution, and stir after 20 minutes Perform centrifugal w...

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
Charge transfer resistanceaaaaaaaaaa
Login to View More

Abstract

The invention discloses a nano composite selenide and a preparation method thereof, and belongs to the technical field of chemical catalysts. The nano composite selenide disclosed by the invention iscompounded by cobalt diselenide and tin diselenide for forming a hollow nano structure with a porous outer wall, a plurality of hollow nano structures are agglomerated, and the outer layer is coated with graphene layers for forming pomegranate-shaped particles. A soluble cobalt salt, sodium citrate and a soluble tin salt are added into graphene oxide, reaction with hydroxide is performed for forming a precursor, and then etching treatment, drying treatment and in-situ selenization are performed for obtaining the hollow nano composite selenide which is coated with the graphene and has a porousouter wall. The nano composite selenide provided by the invention has a high specific surface area, more reaction sites and a unique conductive network; the preparation method has the advantages of easily available raw materials, simple process, low cost and high yield; remarkable achievements in the field of electrocatalysis are expected to be obtained, and after pilot scale up, the nano composite selenide is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of chemical catalysts, in particular to a graphene-coated nanocomposite selenide with a porous outer wall and a hollow structure and a preparation method thereof. Background technique [0002] Energy issues and environmental issues have become the most important issues facing human development. Fossil energy such as oil and natural gas not only pollutes the environment seriously, but also belongs to non-renewable energy. Therefore, it is very important to find a renewable and environmentally friendly energy source. Hydrogen is a renewable and clean energy, and water electrolysis is currently the most effective method for large-scale production of hydrogen in industry. To improve the efficiency of water electrolysis, it is crucial to develop catalysts with excellent performance. At present, the precious metal platinum is the best known catalyst for electrolysis of water, but its large-scale application in i...

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): B01J27/057B01J35/10C25B1/04C25B11/06
CPCC25B1/04B01J27/057C25B11/091B01J35/50B01J35/60Y02E60/36
Inventor 陈远富侯文强于博郑斌杰王新强张万里李言荣
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com