Athavale Swarnima, Micci-Barreca Stefano A, Arole Kailash, Kotasthane Vrushali, Lutkenhaus Jodie L, Radovic Miladin, Green Micah J
Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843, USA.
Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA.
Nanoscale. 2023 Aug 3;15(30):12567-12573. doi: 10.1039/d3nr02386a.
MXenes are 2D nanomaterials which have gained considerable attention from researchers since their discovery in 2011. However, the propensity of these 2D nanomaterials to degrade affects their shelf life. While many studies have focused on the external factors affecting the degradation of MXenes, the effect of internal factors such as terminal groups is not well understood. In this paper, we use -Br and -Cl terminations as model terminal groups to compare the degradation stability of MXenes. From our experiments we observe that -Br terminated ML-TiCT degrades faster than -Cl terminated ML-TiCT. Our study confirms that terminal groups do affect the degradation rate of TiCT. The results suggest that the differences in bond dissociation energy of the M-X bond are responsible for variations in the degradation stability of MXenes. This model study can be generalized to compare the effect of terminal groups on the degradation stability of MXenes.
MXenes是二维纳米材料，自2011年被发现以来，受到了研究人员的广泛关注。然而，这些二维纳米材料的降解倾向会影响其保质期。虽然许多研究集中在影响MXenes降解的外部因素上，但诸如端基等内部因素的影响尚未得到充分理解。在本文中，我们使用-Br和-Cl端基作为模型端基来比较MXenes的降解稳定性。从我们的实验中可以观察到，-Br端基化的ML-TiCT比-Cl端基化的ML-TiCT降解得更快。我们的研究证实，端基确实会影响TiCT的降解速率。结果表明，M-X键的键解离能差异是导致MXenes降解稳定性变化的原因。该模型研究可推广用于比较端基对MXenes降解稳定性的影响。
