Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Graphene/bismuth composite material and modifying method of screen printed electrode

A technology of screen printing electrodes and composite materials, applied in the direction of electrochemical variables of materials, etc., can solve the problems of poor repeatability of electrochemical sensor measurements, and achieve the effects of large-scale production, convenient synthesis, and rapid response.

Inactive Publication Date: 2015-04-01
FUPAIT ENVIRONMENT TECH SUZHOU
View PDF11 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, during the use of the mercury film or the bismuth film, due to the continuous change of the electrode area, the measurement repeatability of the electrochemical sensor applied to it becomes poor.

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
  • Graphene/bismuth composite material and modifying method of screen printed electrode
  • Graphene/bismuth composite material and modifying method of screen printed electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] First, bismuth nitrate, graphene oxide and sodium borohydride were dissolved in water by ultrasonic wave at 300W to obtain a mixed solution with a concentration of 5mmol / L bismuth nitrate, 100mg / L graphene oxide and 5mmol / L sodium borohydride. Next, the above mixed liquid was transferred to a microwave flask, and a uniform mixed solution was formed by ultrasonic waves, and reacted under 500W microwave heating for 10 minutes to obtain a graphene / bismuth composite material. The above-mentioned graphene / bismuth composite material and 0.2mL 0.5% w / w Dupont D520Nafion solution were mixed evenly and coated on the working area of ​​the working electrode of the screen-printed electrode, and dried at 60°C to form a film to obtain a modified screen-printed electrode. The electrodes were activated by soaking with 20 wt% hydrazine hydrate for 8 min before use. In this example, a graphene / bismuth composite material containing bismuth nanospheres of 50-100 nm is attached to the upper...

Embodiment 2

[0029] First, bismuth nitrate, graphene oxide and sodium borohydride were dissolved in water by ultrasonic wave at 500W to obtain a mixed solution with a concentration of 1mmol / L bismuth nitrate, 100mg / L graphene oxide and 2mmol / L sodium borohydride. Next, the above mixed liquid was transferred to a microwave flask, and a uniform mixed solution was formed by ultrasonic waves, and reacted under 800W microwave heating for 10 minutes to obtain a graphene / bismuth composite material. The above-mentioned graphene / bismuth composite material and 0.2mL 0.5% w / w Dupont D520Nafion solution were mixed evenly and coated on the working area of ​​the working electrode of the screen-printed electrode, and dried at 60°C to form a film to obtain a modified screen-printed electrode. The electrodes were activated by soaking with 25 wt% hydrazine hydrate for 5 min before use. In this example, a graphene / bismuth composite material containing 20-50 nm bismuth nanospheres is attached to the upper sur...

Embodiment 3

[0031] First, bismuth nitrate, graphene oxide and sodium borohydride were dissolved in water by ultrasonic wave at 50W to obtain a mixed solution with a concentration of 1mmol / L bismuth nitrate, 100mg / L graphene oxide and 5mmol / L sodium borohydride. Next, the above mixed liquid was transferred to a microwave flask, and a uniform mixed solution was formed by ultrasonic waves, and reacted under 800W microwave heating for 5 minutes to obtain a graphene / bismuth composite material. The above-mentioned graphene / bismuth composite material and 0.2mL 0.5% w / w Dupont D520Nafion solution were mixed evenly and coated on the working area of ​​the working electrode of the screen-printed electrode, and dried at 60°C to form a film to obtain a modified screen-printed electrode. The electrodes were activated by soaking with 5 wt% hydrazine hydrate for 15 min before use. In this example, a graphene / bismuth composite material containing 10-30 nm bismuth nanospheres is attached to the upper surfa...

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
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a graphene / bismuth composite material and a modifying method of a screen printed electrode. A preparation method of the graphene / bismuth composite material includes dissolving and mixing to form a mixture containing 1-25mmol / L of water-soluble bismuth salt, 10-100mg / L of graphene oxide and 1-25mmol / L of reductant; heating to enable the mixture for reaction to obtain the graphene / bismuth composite material. The modifying methodincludes mixing the graphene / bismuth composite material at a mass ratio of 20-200:1 with Nafion liquid; coating a mixture on the screen printed electrode; drying to obtain a modified screen printed electrode with high heavy-metal ion detection repeatability. In addition, the preparation method is easy in raw material getting, convenient in synthesis, quick in reaction and free of pollution in the process of production, and large-scale production can be realized quickly.

Description

technical field [0001] The invention relates to the technical field of electrode materials, in particular to a graphene / bismuth composite material and a method for modifying screen-printed electrodes. Background technique [0002] Heavy metals cause long-term irreversible harm to organisms due to their accumulation in organisms, which has aroused widespread concern. The detection of trace heavy metals is very important in the fields of food, industry and environmental monitoring. Among many detection methods, electrochemical sensors have been widely used in food analysis, industrial analysis, and environmental detection due to their good selectivity, easy miniaturization, easy operation, low power consumption, and low cost. Compared with ordinary glassy carbon electrodes commonly used in electrochemical sensors, screen-printed electrodes have many advantages in application. Modification at will, and save for a long time, etc. [0003] Bismuth is an electrode material that...

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
Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24G01N27/30
Inventor 汪孙力查娟夏思苑黎雨轩
Owner FUPAIT ENVIRONMENT TECH SUZHOU
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com