Abstract
A new method is developed to immobilize silver (Ag) nanocrystals (NCs) on carbon nanotubes (CNTs) by using the pre-coated MoS2 as sacrificial layers, and a type of composite materials consisting with CNTs, Ag NCs and MoS2 have been prepared. In this method the ultral-thin layers of MoS2 are coaxially pre-coated on the CNTs to prepare the hybrid of CNTs-MoS2. The CNTs-MoS2 is used as substrates to immobilize Ag NCs in a hydrothermal solution. During the hydrothermal reaction the MoS2 is oxidized by [Ag(NH3)2]+, and parts of the MoS2 layers are removed in the form of (NH4)2MoO4. The Ag NCs are found to be uniformly dispersed on the CNTs-MoS2. The fabricated composites (CNTs-MoS2–Ag) exhibit excellent catalytic performances in the antibacterial tests under illumination by visible lights. The antibacterial performance is contributed by the ultra-small Ag NCs and the brilliant photo-absorption afforded by the synergistic effects between the CNTs-MoS2 and Ag NCs.
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