One-step synthesis of magnetic recoverable Ag2S/Fe3O4/MoS2 nanocomposites for enhanced visible light photocatalysis
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A novel magnetic Ag2S/Fe3O4/MoS2 hybrid nanostructure was facilely fabricated by one-step hydrothermal synthesis of MoS2 in the presence of satellite structured Ag/Fe3O4 nanoparticles (NPs), in which process Ag was vulcanized into Ag2S NPs concurrent with the production of MoS2. As a result, flower-like MoS2 nanostructures with only several layers in thickness uniformly attached with high-crystallized Ag2S and Fe3O4 NPs were synthesized from the X-ray diffraction (XRD) and transmission electron microscopy (TEM) results. The Ag2S/Fe3O4/MoS2 hybrids exhibit stronger visible light absorption due to the narrow band gaps of Ag2S and MoS2 component. The obtained Ag2S/Fe3O4/MoS2 hybrid nanostructures can be collected and separated with a magnet conveniently. Moreover, the catalytic performance toward decomposition of Rhodamine B (RhB) can be remarkably improved to 73.3% by Ag2S/Fe3O4/MoS2-1 hybrids compared with the Fe3O4/MoS2-1 of 39.9% within 120 min visible light illumination due to the formation of semiconductor interface.
This work was supported by the National Natural Science Foundation of China (21501140, 21403165).