2D Materials Decorated with Ultra-Thin and Porous Graphene Oxide for High Stability and Selective Surface Activity
2D Materials Decorated with Ultra-Thin and Porous Graphene Oxide for High Stability and Selective Surface Activity
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DOI：
10.1002/adma.202002723
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发表时间：
2020-07-23
影响因子：
29.4
通讯作者：
Kim, Il-Doo
中科院分区：
文献类型：
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作者：
Jang, Ji-Soo;Jung, Hong Ju;Kim, Il-Doo
2D黑磷（BP）和MXenes引发了人们对催化、储能和化学传感的巨大研究兴趣。不幸的是，这些材料在实际操作条件下的低稳定性仍然是一个关键的瓶颈，特别是因为它们在潮湿的情况下易于氧化。在这项工作中，设计和应用获得的稳定的二维异质结构装饰BP和MXene（Ti3C2Tx）与少层多孔氧化石墨烯（FHGO）膜。在所得的异质结构系统中，FHGO用作多功能钝化层，其屏蔽BP或MXene免受氧化降解，同时允许目标气体分子通过其微孔并朝向下面的2D材料选择性扩散。通过对稀NO（2）传感的案例研究，证明了这些异质结构在潮湿条件下显示出大大增强的传感性能，其中一致地观察到快速的传感速度和响应，这些结果证实了用多孔FHGO膜进行材料装饰的功效，并表明这是一种可推广的策略用于2D材料的可靠高性能应用。
2D black phosphorous (BP) and MXenes have triggered enormous research interest in catalysis, energy storage, and chemical sensing. Unfortunately, the low stability of these materials under practical operating conditions remains a critical bottleneck, particularly as they are prone to oxidization under moisture. In this work, the design and application of stable 2D heterostructures obtained from decorating BP and MXene (Ti3C2Tx) with few-layer holey graphene oxide (FHGO) membranes are presented. In the resulting heterostructured systems, FHGO serves as a multifunctional passivation layer that shields BP or MXene from oxidative degradation, while allowing the selective diffusion of target gas molecules through its micropores and toward the underlying 2D material. Through a case study of dilute NO(2)sensing, it is demonstrated that these heterostructures show a greatly enhanced sensing performance under humid conditions, where fast sensing speed and response are consistently observed, and high stability is impressively retained upon repetitive sensing cycles for 1000 min. These results corroborate the efficacy of material decoration with porous FHGO membranes and suggest that this is a generalizable strategy for reliable high-performance applications of 2D materials.