Self-surface charge exfoliation and electrostatically coordinated 2D hetero-layered hybrids.
At present, the technological groundwork of atomically thin two-dimensional (2D) hetero-layered structures realized by successive thin film epitaxial growth is in principle constrained by lattice matching prerequisite as well as low yield and expensive production. Here, we artificially coordinate ultrathin 2D hetero-layered metal chalcogenides via a highly scalable self-surface charge exfoliation and electrostatic coupling approach. Specifically, bulk metal chalcogenides are spontaneously exfoliated into ultrathin layers in a surfactant/intercalator-free medium, followed by unconstrained electrostatic coupling with a dissimilar transition metal dichalcogenide, MoSe2, into scalable hetero-layered hybrids. Accordingly, surface and interfacial-dominated photocatalysis reactivity is used as an ideal testbed to verify the reliability of diverse 2D ultrathin hetero-layered materials that reveal high visible-light photoreactivity, efficient charge transfer and intimate contact interface for stable cycling and storage purposes. Such a synthetic approach renders independent thickness and composition control anticipated to advance the development of 'design-and-build' 2D layered heterojunctions for large-scale exploration and applications.
Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, 117583 Singapore, Singapore.
Min-Quan
MQ
Yang
State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, China.|College of Chemistry, New Campus, Fuzhou University, Fuzhou 350108, China.
Yi-Jun
YJ
Xu
Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, 117576 Singapore, Singapore.
Wanheng
W
Lu
Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, 117576 Singapore, Singapore.
Kaiyang
0000-0002-3348-0018
K
Zeng
Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore, Singapore.
Hai
H
Zhu
Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore, Singapore.
Qing-Hua
0000-0002-4153-0767
QH
Xu
Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, 117583 Singapore, Singapore.
Ghim Wei
GW
Ho