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Method for preparing graphene oxide modification column

A technology of graphene and graphene, which is applied in the field of preparation of graphene oxide modified columns, can solve the problems of poor separation reproducibility and low detection sensitivity, and achieve the effect of improving separation ability

Inactive Publication Date: 2016-04-20
QINGDAO UNIV
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Problems solved by technology

However, CE technology has disadvantages such as low detection sensitivity and poor separation reproducibility.

Method used

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  • Method for preparing graphene oxide modification column
  • Method for preparing graphene oxide modification column
  • Method for preparing graphene oxide modification column

Examples

Experimental program
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Embodiment Construction

[0028] Preparation of graphene oxide:

[0029] (1) Add graphite:concentrated sulfuric acid to a three-necked flask at a mass ratio of 1:50, place in an ice-water bath to cool down to 0°C, and continue to stir for 1.5h with ultrasound;

[0030] (2) Slowly add 35 parts of potassium permanganate under the condition of ultrasonic treatment, control the temperature not to exceed 25°C, and continue to stir for 3 hours;

[0031] (3) Add 120 parts of deionized water into the three-necked flask, raise the temperature to 100°C, stir ultrasonically for 1 hour, and turn off the ultrasonic;

[0032] (4) Add 30 parts of deionized water and hydrogen peroxide to the reaction system and let it stand for reduction for 20 hours;

[0033] (5) Finally, wash with 4% potassium hydroxide solution until neutral, and wash with deionized water several times.

[0034] The ultrasonic condition is 1000W.

[0035] Pour the washed colloid into a clean watch glass, dry it at 70°C, grind it, and keep it sea...

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Abstract

The invention relates to a method for preparing a graphene oxide modification column. The method specifically comprises the steps of preparation of a graphene oxide solution, pretreatment of a silica capillary column and modification of graphene oxide. The method disclosed by the invention has the advantages that the inner wall of the silica capillary column is modified by utilization of covalent interaction of the graphene oxide, so that not only can a capillary inner wall be modified as a stationary phase, but also an action site can be provided for separation of an analyte, and the separation capability of the capillary column can be improved.

Description

technical field [0001] The invention relates to the technical field of graphene, in particular to a preparation method of a graphene oxide modified column. Background technique [0002] Graphene oxide (GO) is generally obtained by oxidation of graphite with strong acid, and the preparation methods are mainly Brodie method, Staudenmaier method and Hummers method. CN102225754A discloses a method for preparing graphene oxide, which is obtained by mixing graphite, concentrated acid and strong oxidant, and reacting in a closed environment of 80°C to 130°C, which reduces the control of reaction conditions and is an optimized Hummers method. CN103332670A discloses a method for preparing graphene oxide without the addition of strong acid and strong oxidant. CN104591175A discloses a preparation method using potassium chlorate as an oxidizing agent and performing an oxidation reaction in an ultrasonic state. Graphene oxide not only has a graphene single-layer sheet structure and rel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D15/22B01J20/286
CPCB01D15/22B01J20/286B01J2220/80
Inventor 杨淑静杨超丛海林于冰
Owner QINGDAO UNIV
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