Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of nitrogen-doped graphene/mno2 composite material and preparation method thereof

A nitrogen-doped graphene and composite material technology, applied in the field of nanomaterials, can solve the problems of poor catalytic performance, affecting application, and complicated process of composite material methods, and achieve the effect of enhancing catalytic activity.

Active Publication Date: 2019-04-12
NINGBO GRAPHENE INNOVATION CENT CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Nitrogen-doped graphene-supported composites are one of the many research fields of graphene, and have received great attention in recent years. The introduction of nitrogen-doped graphene into metal oxides can improve the catalytic performance of metal oxides. There are also many reports on the introduction of metal oxides into nitrogen-doped graphene, such as the MnOx and nitrogen-doped graphene composite materials disclosed in Applied Surface Science, 366 (2016), 552-560, and ACS Appl.Mater.Interfaces 2016, 8, 5251-5260 also disclosed MnO 2 and nitrogen-doped graphene composites; however, the currently disclosed nitrogen-doped graphene / MnO 2 The manganese dioxide in the composite material is in the form of particles or flakes, and its catalytic performance is relatively poor, which seriously affects its application, and the disclosed method for preparing the composite material is also cumbersome. Therefore, a nitrogen doped with good catalytic performance is provided. Graphene / MnO 2 Composite materials are of great importance

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
  • A kind of nitrogen-doped graphene/mno2 composite material and preparation method thereof
  • A kind of nitrogen-doped graphene/mno2 composite material and preparation method thereof
  • A kind of nitrogen-doped graphene/mno2 composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] The present invention also provides a nitrogen-doped graphene / MnO 2 A method for preparing a composite material, comprising:

[0023] 1) mixing the manganese source compound solution and the graphene oxide solution to obtain the first mixed solution,

[0024] The manganese source compound is manganese acetate hydrate;

[0025] 2) Add ammonium persulfate to the first mixed solution, and conduct a hydrothermal reaction at 80-200°C for 1-36 hours to obtain nitrogen-doped graphene / MnO 2 composite material.

[0026] According to the present invention, the present invention mixes the manganese source compound solution and the graphene oxide solution to obtain the first mixed solution; wherein, the manganese source compound is preferably manganese acetate tetrahydrate; the manganese source compound solution is preferably manganese source compound solution Aqueous solution; the concentration of the manganese source compound solution is preferably 5 to 100 g / L, more preferabl...

Embodiment 1

[0031] Select a graphene oxide aqueous solution with a concentration of 2.5g / L and a manganese acetate aqueous solution with a concentration of 50g / L, mix evenly according to the mass ratio of graphene oxide and manganese acetate of 1:15, and add according to the mass ratio of manganese acetate to ammonium persulfate of 1:3 100g / L ammonium persulfate solution, then the mixture was reacted at 120°C for 12 hours under hydrothermal conditions, and the obtained product was washed several times with deionized water until the pH of the clear liquid was neutral; finally, the washed product was cooled dry to obtain the final product, i.e. nitrogen-doped graphene / MnO 2 composite material.

Embodiment 2

[0034] Select a graphene oxide aqueous solution with a concentration of 2g / L and a manganese acetate aqueous solution with a concentration of 80g / L, mix evenly according to the mass ratio of graphene oxide and manganese acetate of 1:25, add 50g of manganese acetate and ammonium persulfate according to the mass ratio of 1:8 / L ammonium persulfate solution, then react the mixture under hydrothermal conditions at 140°C for 36 hours, wash the obtained product with deionized water several times until the pH of the clear liquid is neutral; finally dry the washed product The final product is obtained, that is, nitrogen-doped graphene / MnO 2 composite material.

[0035] The morphology of the obtained composite material is detected, and the MnO in the composite material 2The nanowires are intertwined and interlaced to form a porous structure similar to a leaf, and the diameter of the nanowires is 10-20nm. It can be seen from the disk electrode test that the composite obtained in Examp...

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
diameteraaaaaaaaaa
specific surface areaaaaaaaaaaa
electric potential / voltageaaaaaaaaaa
Login to View More

Abstract

The invention provides a nitrogen-doped graphene / MnO 2 Composite material and its preparation method. The method provided by the invention mixes a manganese source compound solution and a graphene oxide solution and then adds ammonium persulfate for heating reaction to obtain nitrogen-doped graphene / MnO. 2 Composite materials; this method can not only achieve the reduction of graphene oxide, nitrogen atom doping and MnO in one step 2 load, and the MnO in the obtained composite material 2 It is linear, thereby increasing its specific surface area in the composite material, so that the catalytic activity of the obtained composite material is greatly enhanced.

Description

technical field [0001] The technical field of nanomaterials of the present invention, in particular to a nitrogen-doped graphene / MnO 2 Composite materials and methods for their preparation. Background technique [0002] The basic structural unit of graphene is the six-membered ring with the most stable structure, and compared with fullerene and carbon nanotubes, it is not only cheap, easy to obtain raw materials, but also light in weight, ideal in large specific surface area, and good in thermal conductivity. It is currently an ideal two-dimensional nanomaterial, and it has broad application prospects in research fields such as microelectronics, functional materials, and chemical sensing. [0003] Nitrogen-doped graphene-supported composites are one of the many research fields of graphene, and have received great attention in recent years. The introduction of nitrogen-doped graphene into metal oxides can improve the catalytic performance of metal oxides. There are also man...

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 Patents(China)
IPC IPC(8): B01J27/24B01J35/10C01B32/184
CPCB01J27/24B01J35/615
Inventor 李世华苗鹤刘兆平薛业建孙珊珊王勤董正豪
Owner NINGBO GRAPHENE INNOVATION CENT CO LTD