Preparation method of graphene oxide with hydrogen peroxide catalyst system

A graphene and graphite technology, applied in the field of graphene oxide preparation, can solve the problems of cumbersome preparation process, serious pollution and high risk, and achieve the effect of simple equipment, low energy consumption and fast reaction speed

Inactive Publication Date: 2018-02-23
嘉兴烯成新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process is highly dangerous, seriously polluted, and costly, and the preparation process is cumbersome and inefficient

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Described a kind of method for preparing graphene oxide that adopts hydrogen peroxide catalytic system, the steps are as follows:

[0021] (1) Raw material pretreatment: After mixing 1 g of flake graphite and deionization evenly, adjust the system pH=4, raise the temperature to 85°C and react for 1 hour to obtain an acidic mixed material;

[0022] (2) Oxidation: Cool the acidic mixture to 60°C, add Fenton's reagent and deionized water, and react in a water bath for 2 h to obtain a graphite oxide solution. The Fenton's reagent: H 2 o 2 with FeSO 4 The mass difference is 8:1;

[0023] (3) Washing: Centrifuge and wash the graphite oxide solution to neutrality;

[0024] (4) Ultrasound: Dilute the solution obtained in step (3) to a concentration of 1 g / L, sonicate for 1.5 h, and freeze-dry to obtain a graphene oxide product.

Embodiment 2

[0026] Described a kind of method for preparing graphene oxide that adopts hydrogen peroxide catalytic system, the steps are as follows:

[0027] (1) Raw material pretreatment: After mixing 1 g of expanded graphite and deionized evenly, adjust the system pH=3, raise the temperature to 80°C and react for 1.5 h to obtain an acidic mixed material;

[0028] (2) Oxidation: Cool the acidic mixture to 70°C, add Fenton's reagent and deionized water, and react in a water bath for 1.5 h to obtain a graphite oxide solution. The Fenton's reagent: H 2 o 2 with FeSO 4 The quality difference is 8:1.5;

[0029] (3) Washing: Centrifuge and wash the graphite oxide solution to neutrality;

[0030] (4) Ultrasound: The solution obtained in step (3) was diluted to a concentration of 1.5 g / L, ultrasonicated for 3 h, and freeze-dried to obtain a graphene oxide product.

Embodiment 3

[0032] Described a kind of method for preparing graphene oxide that adopts hydrogen peroxide catalytic system, the steps are as follows:

[0033] (1) Raw material pretreatment: After mixing 1 g of pre-oxidized graphite and deionized evenly, adjust the system pH=5, raise the temperature to 90°C and react for 2 hours to obtain an acidic mixed material;

[0034] (2) Oxidation: Cool the acidic mixture to 50°C, add Fenton's reagent and deionized water, and react in a water bath for 24 hours to obtain a graphite oxide solution. The Fenton's reagent: H 2 o 2 with FeSO 4 The mass difference is 10:1;

[0035] (3) Washing: Centrifuge and wash the graphite oxide solution to neutrality;

[0036] (4) Ultrasound: Dilute the solution obtained in step (3) to a concentration of 0.5 g / L, sonicate for 2 h, and freeze-dry to obtain a graphene oxide product.

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Abstract

The invention belongs to the field of graphene technology, and particularly relates to a preparation method of graphene oxide. The preparation method particularly includes the steps: (1) raw materialpretreatment: uniformly mixing graphite and deionized water, adjusting the pH (potential of hydrogen) value of the system, and performing heating reaction to obtain acid mixed materials; (2) oxidization: cooling the acid mixed materials, and adding Fenton's reagents and deionized water to react mixture to obtain graphite oxide solution; (3) washing: centrifuging and washing the graphite oxide solution to reach neutral; (4) ultrasound: performing dilution, ultrasound and freeze drying on the solution acquired in the step (3) to obtain a graphene oxide product. The preparation method is simple to operate, mild in condition and free from pollution, and the prepared graphene oxide is high in monolayer rate.

Description

technical field [0001] The invention relates to the technical field of graphene, in particular to a method for preparing graphene oxide. technical background [0002] Graphene is made of carbon atoms with sp 2 A honeycomb planar film composed of a hybrid form, a quasi-two-dimensional material with only one atomic layer thickness, also known as monoatomic layer graphite. The structural characteristics of graphene make it have good strength, flexibility, electrical conductivity, thermal conductivity, optical and other properties, and it is widely used in various fields. Graphene oxide is the oxide of graphene, which has a high specific surface area and abundant functional groups on the surface. At present, the preparation methods of graphene oxide are mainly improved hummer method, etc. In the preparation of hummer and other methods, strong acids such as concentrated sulfuric acid, perchloric acid, concentrated nitric acid and strong oxidants such as potassium permanganate a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/198
Inventor 叶鹏倪华钢秦存琪
Owner 嘉兴烯成新材料有限公司
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