异质结
气凝胶
材料科学
纳米技术
范德瓦尔斯力
表面改性
催化作用
灵敏度(控制系统)
光电子学
分子
化学工程
化学
电子工程
生物化学
工程类
有机化学
作者
Seulgi Kim,Hamin Shin,Jae Woong Lee,Chungseong Park,Yunhee Ahn,Hee Jin Cho,Seoyeon Yuk,Jihan Kim,Dongju Lee,Il‐Doo Kim
出处
期刊:ACS Nano
[American Chemical Society]
日期:2023-09-25
卷期号:17 (19): 19387-19397
被引量:9
标识
DOI:10.1021/acsnano.3c07074
摘要
The concept of integrating diverse functional 2D materials into a heterostructure provides platforms for exploring physics that cannot be accessed in a single 2D material. Here, physically mixing two 2D materials, MXene and MoS2, followed by freeze-drying is utilized to successfully fabricate a 3D MoS2/MXene van der Waals heterostructure aerogel. The low-temperature synthetic approach effectively suppresses significant oxidation of the Ti3C2Tx MXene and results in a hierarchical and freestanding 3D heterostructure composed of high-quality MoS2 and MXene nanosheets. Functionalization of MXene with a MoS2 catalytic layer substantially improves sensitivity and long-term stability toward detection of NO2 gas, and computational studies are coupled with experimental results to elucidate that the mechanism behind enhancements in the gas-sensing properties is effective inhibition of HNO2 formation on the MXene surface, due to the presence of MoS2. Overall, this study has a great potential for expansion of applicability to other classes of two-dimensional materials as a general synthesis method, to be applied in future fields of catalysis and electronics.
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