Abstract

A single layer nano-MoS2 suspension was prepared by an exfoliation method from platelet-like molybdenum disulphide nanoparticles (nano-MoS2). A Co2+/nano-MoS2 intercalation compound (IC) was then prepared by restacking the single layer nano-MoS2 in a Co2+ solution. The resultant was characterised using power X-ray diffraction, scanning electron microscopy and transmission electron microscopy. Results show that single layer nano-MoS2 did not regularly restack along the c axis. However, Co2+ contributed to the regular restacking of single layer nano-MoS2 along the c axis, resulting in spongy-like Co2+/nano-MoS2 IC. The Co2+/nano-MoS2 IC with spongy-like structures had a very high Brunauer–Emmett–Teller surface area and revealed better catalytic activity than the original nano-MoS2. A platelet-like structure was observed when the as prepared Co2+/nano-MoS2 IC was heated at 500°C under N2. Moreover, a novel Co/nano-MoS2 composite was obtained by heating the IC in H2 at 500°C, which provides a method to disperse metal atoms on nano-MoS2.

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