氧化石墨烯热重分析法表征研究

Study on Graphene Oxide Thermogravimetric Method

本文涉及到一种氧化石墨烯热重分析方法研究,通过用两种不同的升温速率测试,寻求一种适合氧化石墨烯的热重分析法,研究发现,当采用常规热重测试方法中取恒定升温速率为15℃/min,会发生石墨烯溢出的现象,样品在190℃到200℃之间会急剧失重,造成结果失真,本实验采取分段改变升温速率的方法进行操作,从室温到300℃,升温速率为2℃/min,从300℃到1000℃升温速率为10℃/min,试验证明此方法不仅可以有效避免石墨烯溢出,让测试结果更准确,同时可以避免检测时间过长,易操作,低成本,结果准确。

This article involves the study of a thermogravimetric analysis method for graphene oxide. By test-ing with two different heating rates, a thermogravimetric analysis method suitable for graphene oxide is sought. If the constant heating rate is 15˚C/min, graphene overflow will occur. The sample will lose weight sharply between 190˚C and 200˚C, causing serious distortion of the results. This experiment uses a stepwise variable speed method to operate, from room temperature to 300˚C, the heating rate. It is 2˚C/min, and the heating rate from (300˚C to 1000˚C) is 10˚C/min. This can not only effectively avoid graphene overflow, make the test results more accurate, but also avoid ex-cessive detection time. This method is easy to operate and low cost. The result is accurate.