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High‐Yield Production of Monolayer FePS 3 Quantum Sheets via Chemical Exfoliation for Efficient Photocatalytic Hydrogen Evolution
Author(s) -
Cheng Zhongzhou,
Shifa Tofik Ahmed,
Wang Fengmei,
Gao Yi,
He Peng,
Zhang Kai,
Jiang Chao,
Liu Quanlin,
He Jun
Publication year - 2018
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201707433
Subject(s) - monolayer , exfoliation joint , materials science , photocatalysis , quantum yield , hydrogen production , yield (engineering) , nanotechnology , chemical engineering , hydrogen , graphene , catalysis , composite material , optics , organic chemistry , chemistry , physics , engineering , fluorescence
2D layered transition metal phosphorus trichalcogenides (MPX 3 ) 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 FePS 3 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) FePS 3 . Benefitting from the monolayer feature, FePS 3 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 FePS 3 QSs and opens up new avenues for designing other low‐dimensional materials based on MPX 3 .