Gram-Scale Aqueous Synthesis of Stable Few-Layered 1T-MoS2 : Applications for Visible-Light-Driven Photocatalytic Hydrogen Evolution.
Most recently, much attention has been devoted to 1T phase MoS2 because of its distinctive phase-engineering nature and promising applications in catalysts, electronics, and energy storage devices. While alkali metal intercalation and exfoliation methods have been well developed to realize unstable 1T-MoS2 , but the aqueous synthesis for producing stable metallic phase remains big challenging. Herein, a new synthetic protocol is developed to mass-produce colloidal metallic 1T-MoS2 layers highly stabilized by intercalated ammonium ions (abbreviated as N-MoS2). In combination with density functional calculations, the X-ray diffraction pattern and Raman spectra elucidate the excellent stability of metallic phase. As clearly depicted by high-angle annular dark-field imaging in an aberration-corrected scanning transmission electron microscope and extended X-ray absorption fine structure, the N-MoS2 exhibits a distorted octahedral structure with a 2a0 × a0 basal plane superlattice and 2.72 Å Mo-Mo bond length. In a proof-of-concept demonstration for the obtained material's applications, highly efficient photocatalytic activity is achieved by simply hybridizing metallic N-MoS2 with semiconducting CdS nanorods due to the synergistic effect. As a direct outcome, this CdS:N-MoS2 hybrid shows giant enhancement of hydrogen evolution rate, which is almost 21-fold higher than pure CdS and threefold higher than corresponding annealed CdS:2H-MoS2.
National Synchrotron Radiation Laboratory, CAS Hefei Science Center, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
Qin
Q
Liu
Hefei National Laboratory for Physical Science at the Microscale, School of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China.|Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China.
Xiuling
X
Li
National Synchrotron Radiation Laboratory, CAS Hefei Science Center, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
Qun
Q
He
National Synchrotron Radiation Laboratory, CAS Hefei Science Center, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
Adnan
A
Khalil
National Synchrotron Radiation Laboratory, CAS Hefei Science Center, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
Daobin
D
Liu
National Synchrotron Radiation Laboratory, CAS Hefei Science Center, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
Ting
T
Xiang
Hefei National Laboratory for Physical Science at the Microscale, School of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China.|Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China.
Xiaojun
X
Wu
National Synchrotron Radiation Laboratory, CAS Hefei Science Center, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
Li
L
Song
1T-MoS2; H2 evolution; HAADF-STEM; aqueous synthesis; gram scale synthesis