升温速率对氧化石墨烯热重分析法表征研究的影响

The Impact of Heating Rate on the Characterization of Graphene Oxide by Thermogravimetric Analysis

本研究探讨了升温速率对氧化石墨烯热重分析(TGA)的影响。实验结果表明,在5℃/min和7℃/min的升温速率下,氧化石墨烯的TGA测试结果稳定,未发生样品溢出,且升温速率对测试结果的影响不显著。然而,当升温速率增至8℃/min时,出现了样品溢出现象。因此,建议在室温至300℃的区间内,采用2℃/min至7℃/min的升温速率,其中5℃/min为推荐值。在300℃以上,升温速率可以提高至10℃/min至15℃/min,直至1000℃。这种分段升温策略有效防止了样品溢出,确保了测试结果的准确性,并为氧化石墨烯的热稳定性评估提供了可靠的数据支持。This study aims to investigate the impact of heating rates on the thermogravimetric analysis (TGA) of graphene oxide (GO). The experiments indicated that when the heating rate was set to 5˚C/min and 7˚C /min, the TGA process of GO was stable, with no sample overflow observed, and the effect of different heating rates on the results was negligible. However, at a heating rate of 8˚C /min, sample overflow occurred. Therefore, it is recommended to use a constant heating rate of 2˚C/min to 7˚C/min for the phase from room temperature to 300˚C, with 5˚C/min being the preferred choice. Beyond 300˚C, the heating rate can be increased to 10˚C/min to 15˚C/min, up to 1000˚C. This segmented heating strategy effectively prevents sample overflow, ensures the accuracy of the test, and provides reliable data support for the assessment of the thermal stability of graphene oxide.