摘要
The technology of semiconductor photocatalystshas become an important research area. 2D molybdenum disulfide (MoS2) is recognized as a promising catalyst for photoelectrocatalytic and photocatalytic (PC) hydrogen evolution reaction (HER). However, owing to its 2D nature of low optical cross-section, the effective light absorption needs to be further boosted. Herein, we dramatically amplify the light-matter interaction by hybridizing these photocatalysts with plasmonic materials that present strong electromagnetic field confinement and with nanowires that offer efficient light management. Such a system is designed in the heterostructure of silicon nanowires (SiNW)/ gold nanoparticles (AuNP)/ MoS2 nanofilms (SiNW/AuNP/MoS2), which demonstrates excellent PC HER. The absorption frequency of 2D-MoS2, the resonance frequency of the 0D-AuNP, and the antireflection frequency of 1D-SiNW match with the visible range, enabling this heterostructure to effectively utilize solar energy. Additionally, an optimal MoS2 nanofilm that is a mixture of 1 T and 2 H phases was prepared with high reproducibility using facile pyrolysis. Moreover, the SiNW substrate validates high antireflection properties, achieving 95% visible light absorption. In addition, SiNW forms a p-n junction with the MoS2 to facilitate charge separation. The synergetic hybrid of 1D-SiNW/0D-AuNP/2D-MoS2 nanofilms exhibits the highest hydrogen generation rate of 246 mmol g(-1) h(-1).