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Graphene composite and preparation method thereof

A composite material and graphene technology, applied in the field of graphene, can solve the problems of high energy consumption and difficult process, and achieve the effects of low energy consumption, simple process and reduced production cost.

Inactive Publication Date: 2016-05-04
CHANGZHOU MOZHICUI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] For this reason, what the present invention is to solve is the problem that the preparation method of the existing nitrogen-doped reduced graphene oxide / nitrogen-doped titanium dioxide composite material is difficult in process and high in energy consumption, thereby providing a kind of simple process and low production energy consumption. Graphene composite material and preparation method thereof

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  • Graphene composite and preparation method thereof
  • Graphene composite and preparation method thereof
  • Graphene composite and preparation method thereof

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Embodiment 1

[0041] The present embodiment provides a kind of preparation method of graphene composite material, comprises the steps:

[0042] S1, preparing titanium dioxide nanowires;

[0043] Specifically:

[0044] S11. Configure 45ml of an aqueous solution of 15mol / L sodium hydroxide, add 480mg of titanium dioxide P25, and mix evenly to prepare a mixed solution A;

[0045] S12. Put the mixed solution A in a hydrothermal reactor with a volume of 100ml and a polytetrafluoroethylene liner, and react at 180°C for 48 hours to obtain the mixed solution B;

[0046] S13, centrifuging and washing the mixed solution B until the eluate is neutral to obtain a precipitate A;

[0047] S14. Perform hydrogen ion exchange on the precipitate A, centrifuge and wash until the eluate is neutral, and obtain precipitate B after drying; the hydrogen ion exchange step is: place the precipitate A at a concentration of 0.2 mol / L of nitric acid aqueous solution, stirred slowly for 12 hours, repeated 1-3 times....

Embodiment 2

[0053] The present embodiment provides a kind of preparation method of graphene composite material, comprises the steps:

[0054] S1, preparing titanium dioxide nanowires;

[0055] Specifically:

[0056] S11. Configure 45ml of an aqueous solution of 10mol / L sodium hydroxide, add 360mg of titanium dioxide P25, and mix evenly to prepare a mixed solution A;

[0057] S12. Put the mixed solution A in a polytetrafluoroethylene-lined hydrothermal reactor, and react at 150° C. for 72 hours to obtain the mixed solution B;

[0058] S13, centrifuging and washing the mixed solution B until the eluate is neutral to obtain a precipitate A;

[0059] S14. Perform hydrogen ion exchange on the precipitate A, centrifuge and wash until the eluate is neutral, and obtain precipitate B after drying; the hydrogen ion exchange step is: place the precipitate A at a concentration of 0.5 mol / L of nitric acid aqueous solution, stirred slowly for 12 hours, repeated 2 times.

[0060] S15. Calcining the p...

Embodiment 3

[0064] The present embodiment provides a kind of preparation method of graphene composite material, comprises the steps:

[0065] S1, preparing titanium dioxide nanowires;

[0066] Specifically:

[0067] S11. Configure 45ml of an aqueous solution of 10mol / L sodium hydroxide, add 3.6g of titanium dioxide P25, and mix evenly to prepare a mixed solution A;

[0068] S12. Put the mixed solution A in a polytetrafluoroethylene-lined hydrothermal reaction kettle, and react at 220° C. for 12 hours to obtain the mixed solution B;

[0069] S13, centrifuging and washing the mixed solution B until the eluate is neutral to obtain a precipitate A;

[0070] S14. Perform hydrogen ion exchange on the precipitate A, centrifuge and wash until the eluate is neutral, and obtain precipitate B after drying; the hydrogen ion exchange step is: place the precipitate A at a concentration of 0.1 mol / L of nitric acid aqueous solution, stirred slowly for 12 hours, repeated 3 times.

[0071] S15. Calcin...

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Abstract

The invention discloses a graphene composite comprising nitrogen-doped reduced graphene oxide and nitrogen-doped titanium dioxide nanowires, wherein the length-diameter ratio of the titanium dioxide nanowires is larger than 10. The one-dimensional titanium dioxide nanowires are selected as an active component, have better electronic transmission channels and are beneficial to acceleration of electronic transmission and increase of the reaction rate. Meanwhile, the one-dimensional titanium dioxide nanowires can better prevent stacking of graphene sheets, more effectively use the characteristic of large specific surface of graphene, enlarge the reaction contact area and increase the catalytic reaction rate. A preparation method of the graphene composite adopts a simple process, raw materials are easy to store, the reaction is mild, energy consumption is lower, and the method is suitable for industrial application. Meanwhile, the titanium dioxide nanowires with controllable morphology are prepared firstly, then the graphene composite is prepared, the product cost is reduced effectively, and product quality controllability can be realized.

Description

technical field [0001] The invention relates to the field of graphene, in particular to a graphene composite material with simple process and low production energy consumption and a preparation method thereof. Background technique [0002] Graphene is a carbon atom by sp 2 The carbon lattice is closely arranged to form a layered material similar to a honeycomb structure, which has good thermal conductivity, mechanical properties, chemical stability, and large specific surface area, which makes it widely used in nanoelectronics, sensors, nanocomposites, batteries, Many fields of technology, such as supercapacitors and hydrogen storage, hold great promise. [0003] In addition, the electron movement speed of graphene reaches 1 / 300 of the speed of light, which far exceeds the movement speed of electrons in general conductors. Many studies are looking forward to improving the electrical properties of materials by combining with graphene. [0004] Chinese patent document CN1044...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/06C02F1/30
CPCC02F1/30B01J27/24C02F2101/30C02F2305/10B01J35/58B01J35/40
Inventor 吉成胜
Owner CHANGZHOU MOZHICUI TECH CO LTD
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