Preparation method of novel three-dimensional nitrogen doped graphene composite material system
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A nitrogen-doped graphene and graphene technology, applied in the field of material science, can solve the problems of difficult mass production, heavy pollution, and high cost
Active Publication Date: 2015-10-28
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
View PDF9 Cites 83 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
In the field of lithium-ion batteries, reduced graphene oxide is the most common substrate used as a composite material, but its weak conductivity limits its application as a conductive network, and the nitrogen atoms in nitrogen-doped graphene can provide more Electron cloud density to increase conductivity
[0003] At present, the methods for synthesizing nitrogen-doped materials are generally arc discharge or chemical vapor deposition. The preparation process of these methods is complex, high cost, and polluting, and it is difficult to prepare in large quantities.
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
preparation example Construction
[0020] The invention provides a preparation method of a novel three-dimensional nitrogen-doped graphene composite system, which includes: dispersing graphene oxide in a solvent, adding nitrogen-containing compounds and selected materials, and reacting after uniform mixing, the reaction temperature is 0-150 ℃, the reaction time is 0-8 h, and then washed and dried in sequence to obtain a three-dimensional nitrogen-doped graphene composite system.
[0021] Further, the mass ratio of the graphene oxide to the nitrogen-containing compound is 0.1-1:100.
[0022] Further, the solvent may be selected from, but not limited to, any one or a mixture of two or more of water, methanol, ethanol, ethylene glycol, and N,N-dimethylformamide. Preferably from polar solvents, especially preferably from water.
[0023] Further, the nitrogen-containing compound may be selected from but not limited to ammonia water, urea, pyridine, pyrrole, hydrazine, dimethylamine, methylethylamine, ethylenediammo...
Embodiment 1
[0040] Take 5 mL of 4 mg / mL graphene oxide aqueous dispersion, 6 g of urea and 12.5 mL of deionized water and mix together, ultrasonically mix well for 1 h, pour it into a polytetrafluoroethylene liner and put it into an autoclave, 150 The hydrothermal reaction was carried out at ℃ for 8 h, and it was naturally lowered to room temperature. After taking out the sample and immersing it in deionized water for 24 hours, the nitrogen-doped graphene product was obtained. The product can be further freeze-dried. For its structure, please refer to Figure 1a-Figure 1b , nitrogen doping amount is 10 wt.%.
Embodiment 2
[0042]Take 5 mL of 4 mg / mL graphene oxide aqueous dispersion, 6 g of urea, 12.5 mL of deionized water and 1 g of TiO 2 The powders were mixed together and mixed thoroughly by ultrasonication for 1 h, then poured into a polytetrafluoroethylene liner and placed in an autoclave for a hydrothermal reaction at 150 °C for 8 h, then cooled down to room temperature naturally, and the samples were taken out and soaked in deionized water for dialysis for 24 hours After that, the three-dimensional nitrogen-doped graphene-TiO 2 Composite material, number NGT-2, its structure please refer to Figure 2a-Figure 2b , nitrogen doping amount is 10 wt.%.
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
Login to view more
Abstract
The invention discloses a preparation method of a novel three-dimensional nitrogen doped graphene composite material system. The method comprises the following steps: 1, uniformly dispersing graphene oxide in a solvent at room temperature, adding a selected material and a nitrogen-containing compound, and uniformly mixing to form a mixed solution; 2, reacting the mixed solution at a temperature from room temperature to 150DEG C for 0-8h; and 3, cooling the above obtained product to room temperature, centrifuging, collecting the obtained product, washing, and drying to obtain the nitrogen doped graphene composite material. The three-dimensional nitrogen doped graphene composite material system with the nitrogen content of 8-19% can be efficiently and controllably prepared through the method, and the nitrogen content of the system can be controlled by changing the kind and the amount of the added nitrogen-containing compound, the reaction temperature and the reaction time; and the method is simple, is easy to enforce, allows the yield to be greater than 98.9%, and can be widely used in fields of water treatment, biomedicines, energy generation, conversion and storage devices, electrostatic prevention, heat management, heat conduction and dissipation, sensors, electromagnetic shielding, wave absorption and catalysis.
Description
technical field [0001] The invention relates to a preparation process of a graphene-based composite material system, in particular to a preparation method of a novel three-dimensional nitrogen-doped graphene composite material system, and belongs to the field of material science. Background technique [0002] At present, a lot of research has been done on the doping of graphene. Dopants include boron, nitrogen, gases, metals and organic molecules, etc., and the chemical activity and electrical properties of the doped graphene have been greatly improved. Among the many dopants, nitrogen-doped graphene has received the most attention. Compared with undoped graphene, nitrogen-doped graphene has more active areas, which is more conducive to the lithium intercalation / intercalation of its surface. delithiation occurs. In the field of lithium-ion batteries, reduced graphene oxide is the most common substrate used as a composite material, but its weak conductivity limits its appli...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04H01M4/139H01G11/30
CPCY02E60/10
Inventor 刘立伟陈明亮李伟伟李奇郭玉芳邱胜强廖书田刘朝军
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
Login to view more 
Login to view more