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

Method for preparing modified polyaniline grafted functionalized graphene composite cadmium sulfide quantum dots

A graphene composite and polyaniline technology, which is applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc., can solve the limitation of polyaniline conductivity, high-efficiency conversion of solar energy, Problems such as large interfacial distance and photocorrosion can achieve the effects of ensuring catalytic efficiency and recyclability, strengthening force, and accelerating separation

Inactive Publication Date: 2017-05-31
EAST CHINA JIAOTONG UNIVERSITY
View PDF3 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the two-component composite materials prepared by these methods have a large interfacial distance due to weak force between different components, poor separation of electrons and holes, and the product has low purity and poor photocorrosion resistance.
In order to promote the rapid movement of electrons between materials and at the same time improve the defects of cadmium sulfide, which is prone to photocorrosion under visible light, a common improvement method is to form a core-shell structure of cadmium sulfide and polyaniline, and wrap cadmium sulfide quantum dots in organic Conductive polyaniline is used as a protective layer, but this method also limits the high-efficiency conversion of solar energy due to the lack of conductivity of polyaniline

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
  • Method for preparing modified polyaniline grafted functionalized graphene composite cadmium sulfide quantum dots
  • Method for preparing modified polyaniline grafted functionalized graphene composite cadmium sulfide quantum dots
  • Method for preparing modified polyaniline grafted functionalized graphene composite cadmium sulfide quantum dots

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] This example will illustrate that the method of the present invention reacts with GO and aniline at a mass ratio of 1:10 to obtain RGO, which is then generated in an in-situ polymerization system with a mass ratio of RGO to NAN of 1:10 and a molar ratio of NAN to cadmium source of 1:2. The cadmium-containing precursor is finally placed in an ice-water bath, with the molar ratio of cadmium source and sodium sulfide nonahydrate in the cadmium-containing precursor being 1:1, and the reaction time is 2h to form a composite material, which is realized according to the three-step synthesis reaction path.

[0049] Weigh 160 mg of GO prepared by improving Hummers, disperse it in 160 ml of water and sonicate to a homogeneous solution, add 1.6 g of aniline and 0.96 ml of concentrated ammonia water to it, heat up to 95 °C and react for 6 h. After the reaction is completed, centrifuge, Washing with absolute ethanol and drying to obtain RGO; then take 0.0756g RGO, 0.756gNAN, 2.66g ca...

Embodiment 2

[0053] This example will illustrate that the method of the present invention reacts with GO and aniline at a mass ratio of 1:10 to obtain RGO, which is then generated in an in-situ polymerization system with a mass ratio of RGO to NAN of 1:6 and a molar ratio of NAN to cadmium source of 1:2. The cadmium-containing precursor is finally placed in an ice-water bath, with the molar ratio of cadmium source and sodium sulfide nonahydrate in the cadmium-containing precursor being 1:1, and the reaction time is 2h to form a composite material, which is realized according to the three-step synthesis reaction path.

[0054] Weigh 160 mg of GO prepared by improving Hummers, disperse it in 160 ml of water and sonicate to a homogeneous solution, add 1.6 g of aniline and 0.96 ml of concentrated ammonia water to it, heat up to 95 °C and react for 6 h. After the reaction is completed, centrifuge, RGO was obtained by post-processing such as washing with absolute ethanol and drying; then take 0.0...

Embodiment 3

[0057] This example will illustrate that the method of the present invention reacts with GO and aniline at a mass ratio of 1:10 to obtain RGO, which is then generated in an in-situ polymerization system with a mass ratio of RGO to NAN of 1:10 and a molar ratio of NAN to cadmium source of 1:0.5. The cadmium-containing precursor is finally placed in an ice-water bath, with the molar ratio of cadmium source and sodium sulfide nonahydrate in the cadmium-containing precursor being 1:1, and the reaction time is 2h to form a composite material, which is realized according to the three-step synthesis reaction path.

[0058] Weigh 160 mg of GO prepared by improving Hummers, disperse it in 160 ml of water and sonicate to a homogeneous solution, add 1.6 g of aniline and 0.96 ml of concentrated ammonia water to it, heat up to 95 °C and react for 6 h. After the reaction is completed, centrifuge, RGO was obtained after post-treatment such as washing with absolute ethanol and drying; then tak...

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 sizeaaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing modified polyaniline grafted functionalized graphene composite cadmium sulfide quantum dots. The method comprises the steps of preparing graphene oxide (GO), carrying out ultrasonic dispersion to obtain a uniform solution, putting a certain volume of stronger ammonia water and aniline into the GO solution, carrying out a reaction at a certain temperature so as to obtain functionalized reduced graphene oxide (RGO), uniformly mixing a certain amount of RGO, N-phenylglycine and a cadmium source in an in-situ polymerization system with a weakly acidic atmosphere, adding a certain amount of ammonium persulfate into the mixture as an oxidant, carrying out a reaction so as to prepare a cadmium-containing composite material precursor, and finally, introducing a sulfur source under ice water bath conditions, thereby preparing an N-substituted polyaniline carboxylate grafted graphene cadmium sulfide quantum dot photoelectric material by using a mechanism of nucleation between sulfur and cadmium. According to the composite photoelectric material prepared by the method provided by the invention, the agglomeration of cadmium sulfide and graphene is inhibited through covalent grafting, the light corrosion resistance of cadmium sulfide is improved, the transfer speed of electrons is accelerated, and the efficiency of photoelectric conversion under visible light is increased.

Description

technical field [0001] The invention relates to a preparation method of modified polyaniline grafted functionalized graphene composite cadmium sulfide quantum dots, belonging to the technical field of conductive polymer materials. Background technique [0002] Since the 21st century, with the rapid development of science and technology, the global industrialization process has been further accelerated, and the human demand for energy has increased to a higher level. At present, the use of energy is still dominated by traditional coal, oil, and natural gas, but this type of fossil energy is a non-renewable energy, and a large amount of organic pollutants will be generated during the use of energy, which will have a negative impact on the water environment, soil quality, biological The living environment has a serious impact and cannot be used sustainably. Therefore, it is imminent to find a new energy source that can be used sustainably and is not destructive to the environm...

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): C08G73/02B01J31/06
CPCC08G73/0266B01J31/069B01J35/39
Inventor 章家立郑珊杨标叶小爱曾以仁邓祥福蒋乾
Owner EAST CHINA JIAOTONG UNIVERSITY
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