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ACS Nano. 2014 Jul 22;8(7):6979-85. doi: 10.1021/nn501807y. Epub 2014 Jun 9.

Optical properties of metal-molybdenum disulfide hybrid nanosheets and their application for enhanced photocatalytic hydrogen evolution.

Author information

1
Department of Materials Science & Engineering, CAS key Lab of Materials for Energy Conversion, University of Science and Technology of China , Hefei, Anhui 230026, P. R. China.

Abstract

Limited control over charge recombination between photogenerated charge carriers largely hinders the progress in photocatalysis. Here, we introduce metal nanoparticles (Cr, Ag) to the surface of MoS2 nanosheets by simple synthetic means creating a hybrid metal-MoS2 nanosheet system with well-defined metal/semiconductor interfaces. We demonstrate that this hybrid nanosheet structure is capable of decoupling light absorption, primarily in MoS2, and carrier separation, across the metal-MoS2 heterostructure leading to drastic quenching of recombination between photogenerated carriers in MoS2, as proven by absorptance, photoluminescence, and ultrafast pump-probe spectroscopy. The photocatalytic activity in the hybrid system is also improved, which further shows excellent stability against photocorrosion.

PMID:
24884001
DOI:
10.1021/nn501807y

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