Thermo gravimetric analysis method for graphene oxide

A thermogravimetric analysis and graphene technology, which is applied in the field of chemical testing and analysis, can solve problems such as inaccurate test results, and achieve the effects of fast testing process, simple process and easy operation.

Active Publication Date: 2016-08-03
QINGDAO HUAGAO GRAPHENE CORP LTD
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Problems solved by technology

Utilizing thermogravimetric analysis to measure and analyze the properties of graphene oxide is a conventional technology choice in this field, but in the prior art, when graphene oxide is subjected to thermogravimetric analysis and testing, graphene oxide will be reduced to Graphene and the reaction is violent, so that graphene overflows the test crucible, and even overflows the thermogravimetr

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  • Thermo gravimetric analysis method for graphene oxide
  • Thermo gravimetric analysis method for graphene oxide

Examples

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Embodiment 1

[0015] The thermogravimetric analysis method for graphene oxide that the present embodiment relates to comprises the following steps:

[0016] (1) Pass the graphene oxide powder through a 100-300 mesh sieve, and dry it under vacuum conditions at 50-100°C for 1-6h to constant weight, and put it in a desiccator as a sample for subsequent use;

[0017] (2) Accurately weigh 0.1-50.0 mg of the above-mentioned sample with an electronic balance and put it into a crucible, and then accurately weigh 1.0-100.0 mg of the above-mentioned sample with an electronic balance Or add the powder material formed by doping with quartz into the crucible where the sample is placed and stir and mix evenly; the other crucible is an empty crucible, and then put the two crucibles into the thermogravimetric analyzer at the same time;

[0018] (3) Start the thermal analysis software for thermogravimetric analysis, set the heating range to 25-800°C, the heating rate to 5-200°C / min, preferably 10°C / min or 2...

Embodiment 2

[0020] In this embodiment, the sample without powder material is used as a reference example, and the same thermogravimetric analysis method as in Example 1 is used for analysis and testing, the difference is that only 0.1-50.0 mg of the sample is put into a crucible. In the same way, the other crucible is an empty crucible, and then the two crucibles are placed on the two trays of the sample holder in the thermogravimetric analyzer respectively and the insulation cover is covered to carry out the subsequent steps. The obtained graphene oxide thermogravimetric curve is as follows figure 1 shown.

[0021] Comparing the test results in Example 1 and Example 2, it can be seen that: after the powder material is added in Example 1, the graphene oxide density in the test crucible is reduced, thereby effectively reducing the friction between the graphene oxide powders. Contact, so that when it reaches the reduction temperature, the severity of the reaction is slowed down, and the ove...

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Abstract

The invention belongs to the technical field of chemical testing and analyzing, and relates to a thermo gravimetric analysis method for graphene oxide .The thermo gravimetric analysis method includes the steps that 1, graphene oxide powder is sieved to be dried to be at the constant weight under the vacuum condition to serve as a sample ready for use; 2, the sample and a powder material are respectively put into a crucible, stirred and mixed, the powder material is formed in the mode that sodium chloride, alumina, quartz, strontium carbonate graphite and/or zirconium dioxide are doped, the mass ratio of the sample to the powder material is 1:0.1-1:100, and after the mixture is stirred to be even, the crucible and another empty crucible are put into a thermo-gravimetry analyzer at the same time; 3, thermo analysis software is started to conduct thermo gravimetric analysis, the heating rate is set to be 5 DEG C/min to 200 DEG C/min, the heating range is set to be at 25 DEG C to 800 DEG C, inert gas or air atmosphere is led to start testing, and therefore thermo gravimetric analysis of the graphene oxide is achieved .The thermo gravimetric analysis method is low in cost, simple in process, scientific in theory, easy to operate, small in required sample number, quick and accurate in testing process and free of pollution and waste.

Description

Technical field: [0001] The invention belongs to the technical field of chemical testing and analysis, and relates to a thermogravimetric analysis method for graphene oxide, which avoids the phenomenon of graphene overflowing during the thermogravimetric analysis of graphene oxide in the prior art. Background technique: [0002] Thermogravimetric Analysis (TG or TGA) refers to a thermal analysis technique that measures the relationship between the mass of the sample to be tested and the temperature or time change under the program-controlled temperature. It is generally used to study the thermal stability and composition of materials. In the prior art, TGA is a commonly used detection method in research and development and quality control, and it is often used in conjunction with other analysis methods for comprehensive thermal analysis in actual material analysis, so as to achieve the purpose of comprehensive and accurate material analysis. Graphene oxide is the product of ...

Claims

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Application Information

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IPC IPC(8): G01N5/00
CPCG01N5/00
Inventor 钟成张丽东魏万林
Owner QINGDAO HUAGAO GRAPHENE CORP LTD
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