Plasmon Ag nanoparticle/Bi2S3 ultrathin nanobelt/oxygen-doped flower-like MoS2 nanosphere ternary heterojunctions for promoting charge separation and enhancing solar-driven photothermal and photocatalytic performances

摘要

Plasmon Ag nanoparticle/Bi2S3 ultrathin nanobelt/oxygen-doped flower-like MoS2 nanosphere ternary heterojunction photocatalysts are fabricated via hydrothermal and photoreduction strategies. The introduction of Ag nanoparticles and defective MoS2 and the formation of heterojunctions can induce localized surface plasmon resonance and promote charge separation, respectively, which can extend the photoresponse to the visible light and near-infrared regions and obviously enhance the photothermal and photocatalytic performances. The ternary heterojunction photocatalysts show that the photocatalytic degradation ratio of 2,4-dichlorophenol reaches 99.2% under visible light irradiation. In addition, the photocatalytic hydrogen evolution rate reaches 526.3 mu mol h(-1) g(-1), which is several times higher than that of pristine MoS2 and Bi2S3. This study offers a new strategy for designing other highly efficient heterojunction photocatalysts. In addition, these ternary heterojunctions show high stability, which is favorable for practical applications in the environmental and energy fields.