High-quality single-layer nanosheets of MS2 (M = Mo, Nb, Ta, Ti)   directly exfoliated from AMS(2) (A = Li, Na, K) crystals

doi:10.1039/c7tc00838d

CORC > 北京大学 > 化学与分子工程学院

	High-quality single-layer nanosheets of MS2 (M = Mo, Nb, Ta, Ti) directly exfoliated from AMS(2) (A = Li, Na, K) crystals
	Guo, Chenguang ; Li, Hui ; Zhao, Wei ; Pan, Jie ; Lin, Tianquan ; Xu, Jijian ; Chen, Mingwei ; Huang, Fuqiang
刊名	JOURNAL OF MATERIALS CHEMISTRY C
	2017
关键词	TRANSITION-METAL DICHALCOGENIDE HYDROGEN EVOLUTION REACTION ELECTRICAL-PROPERTIES GRAPHENE ELECTRODES PHASE FILMS HETEROSTRUCTURES INTERCALATION TRANSPARENT
DOI	10.1039/c7tc00838d
英文摘要	Layered transition metal dichalcogenides (TMDs) such as MoS2 have attracted considerable interest as two-dimensional materials because of their unique physical and chemical properties. Single or few-layer TMD nanosheets can be achieved by conventional Li intercalation methods through organolithium chemistry or electrochemistry. However, these methods are hampered by the low yield, mixed phases and a lot of defects inside the nanosheets. Here we develop a novel general strategy to prepare single-layer TMD nanosheets by using AMS(2) (A = Li, Na, K; M = Mo, Nb, Ta, Ti) crystals as ideal precursors. The crystal structure of these compounds ensures the robust S-M-S layers and fully filled alkali atoms between them, which lead to a high-yield production of high-quality single-layer nanosheets by following chemical exfoliation. Surprisingly, MoS2 nanosheets obtained by LiMoS2 crystals show a high-quality 1T' phase, while the widely used n-butyl lithium method can only prepare phase-mixed (2H, 1T, 1T') nanosheets with abundant defects. The as-prepared 1T' MoS2 nanosheets exhibit a remarkable electrical conductivity (618 S cm(-1)), which is much higher than that of MoS2 nanosheets (35.4 S cm(-1)) obtained using the n-butyl lithium method, also the highest value in MoS2 related materials and superior to the best value of the reported 2D films of graphene (550 S cm(-1)).; National key research and development program [2016YFB0901600]; "Strategic Priority Research Program (B)" of the Chinese Academy of Sciences [XDB04040200]; CAS Center for Excellence in Superconducting Electronics; NSF of China [61376056]; Science and Technology Commission of Shanghai [16JC1401700, 14520722000]; SCI(E); ARTICLE; 24; 5977-5983; 5
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/472625]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Guo, Chenguang,Li, Hui,Zhao, Wei,et al. High-quality single-layer nanosheets of MS2 (M = Mo, Nb, Ta, Ti) directly exfoliated from AMS(2) (A = Li, Na, K) crystals[J]. JOURNAL OF MATERIALS CHEMISTRY C,2017.
APA	Guo, Chenguang.,Li, Hui.,Zhao, Wei.,Pan, Jie.,Lin, Tianquan.,...&Huang, Fuqiang.(2017).High-quality single-layer nanosheets of MS2 (M = Mo, Nb, Ta, Ti) directly exfoliated from AMS(2) (A = Li, Na, K) crystals.JOURNAL OF MATERIALS CHEMISTRY C.
MLA	Guo, Chenguang,et al."High-quality single-layer nanosheets of MS2 (M = Mo, Nb, Ta, Ti) directly exfoliated from AMS(2) (A = Li, Na, K) crystals".JOURNAL OF MATERIALS CHEMISTRY C (2017).