High-Yield Production of Monolayer FePS3 Quantum Sheets via Chemical Exfoliation for Efficient Photocatalytic Hydrogen Evolution

Advanced Materials
Zhongzhou ChengJun He

Abstract

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 H2 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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Citations

Dec 6, 2019·Small·Adam K BudniakEfrat Lifshitz
Aug 15, 2019·Small·Si MengHan Zhang
Nov 6, 2018·Nano-micro Letters·Cheng-Feng DuQingyu Yan
Oct 28, 2019·Scientific Reports·Heng XuJunBo Yang
Feb 9, 2021·Nanoscale·Hongxiao ZhaoJingbo Li
Oct 27, 2021·Inorganic Chemistry·Matthew ChengVinayak P Dravid

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