Journal
ADVANCED MATERIALS
Volume 30, Issue 26, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201707433
Keywords
chemical exfoliation; FePS3; monolayer quantum sheets; water splitting
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Funding
- Ministry of Science and Technology of China [2016YFA0200700]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA09040201]
- National Natural Science Foundation of China [61574050, 61474033, 11674072, 21703047, 21373065]
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication
- Youth Innovation Promotion Association CAS
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2D layered transition metal phosphorus trichalcogenides (MPX3) possess higher in-plane stiffness and lower cleavage energies than graphite. This allows them to be exfoliated down to the atomic thickness. However, a rational exfoliation route has to be sought to achieve surface-active and uniform individual layers. Herein, monolayered FePS3 quantum sheets (QSs) are systematically obtained, whose diameters range from 4-8 nm, through exfoliation of the bulk in hydrazine solution. These QSs exhibit a widened bandgap of 2.18 eV as compared to the bulk (1.60 eV) FePS3. Benefitting from the monolayer feature, FePS3 QSs demonstrate a substantially accelerated photocatalytic H-2 generation rate, which is up to three times higher than the bulk counterpart. This study presents a facile way, for the first time, of producing uniform monolayer FePS3 QSs and opens up new avenues for designing other low-dimensional materials based on MPX3.
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