气候变化领域集成服务门户(CCPortal): Suppression of Sn2+ and Lewis acidity in SnS2/black phosphorus heterostructure for ppb-level room temperature NO2 gas sensor

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DOI	10.1016/j.scib.2021.07.007
	Suppression of Sn2+ and Lewis acidity in SnS2/black phosphorus heterostructure for ppb-level room temperature NO2 gas sensor
	Liang T.; Dai Z.; Liu Y.; Zhang X.; Zeng H.
发表日期	2021
ISSN	20959273
英文摘要	The selective detection of harmful gases is of great significance to human health and air quality, triggering the need for special customizations of sensing material structure. In this study, we prepared a novel SnS2/black phosphorus (BP) two-dimensional (2D)-2D heterostructure via the in situ hydrothermal growth of SnS2 nanosheets on exfoliated BP lamellae for NO2 sensing applications. In the SnS2/BP composite, the holes with high oxidizability in p-type BP could oxidize Sn2+ into Sn4+, thus inhibiting the formation of Lewis acidic S vacancies. This Sn2+/Lewis acidity suppression of the composite was further confirmed by X-ray photoelectron spectroscopy and acidic double-layer capacitance analyses, and promoted the adsorption and detection of acidic NO2. Owing to its valence and Lewis acidity engineering, the SnS2/BP heterostructure sensor could detect trace levels of NO2 as low as 100 ppb (parts per billion) with high response, fast response/recovery, good stability, and selectivity at room temperature. The high absorption energy of NO2 (−0.74 eV), as indicated by the density functional theory calculations, suggests that NO2 was chemically adsorbed on the SnS2/BP surface, which was also evidenced by the in situ Raman spectroscopy results. This work opens up interesting opportunities for the rational design of highly efficient NO2 gas sensors through Lewis acidity modification and interface engineering. © 2021 Science China Press
关键词	Interface engineering Nitrogen dioxide detection Phosphorene SnS2 Surface Lewis acidity
英文关键词	Chemical sensors; Density functional theory; Gas detectors; IV-VI semiconductors; Monolayers; Nanostructures; Phase interfaces; Phosphorus; Semiconducting tin compounds; X ray photoelectron spectroscopy; Gas-sensors; Harmful gas; Human health; Interface engineering; Lewis acidity; Nitrogen dioxide detection; NO $-2$; Phosphorene; Selective detection; Surface lewis acidity; Nitrogen oxides
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207479
作者单位	State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China; MIIT Key Laboratory of Advanced Display Materials and Devices, College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China; Xi'an Jiaotong University Suzhou Academy, Suzhou, 215123, China
推荐引用方式 GB/T 7714	Liang T.,Dai Z.,Liu Y.,et al. Suppression of Sn2+ and Lewis acidity in SnS2/black phosphorus heterostructure for ppb-level room temperature NO2 gas sensor[J],2021.
APA	Liang T.,Dai Z.,Liu Y.,Zhang X.,&Zeng H..(2021).Suppression of Sn2+ and Lewis acidity in SnS2/black phosphorus heterostructure for ppb-level room temperature NO2 gas sensor.Science Bulletin.
MLA	Liang T.,et al."Suppression of Sn2+ and Lewis acidity in SnS2/black phosphorus heterostructure for ppb-level room temperature NO2 gas sensor".Science Bulletin (2021).