Nanocarved MoS₂–MoO₂ Hybrids Fabricated Using <i>in Situ</i> Grown MoS₂ as Nanomasks

Abstract

The morphology and hybridization of nanostructures are crucial to achieve properties for various applications. An in situ grown three-dimensional (3D) MoS 2 nanomask has been adopted to control the morphology and hybridization of molybdenum compounds. The in situ generated MoS 2 mask on MoO 3 nanobelt surfaces allowed us to fabricate a 3D c -MoO 2 @MoS 2 hybrid nanostructure, in which c -MoO 2 is a carved MoO 2 nanobelt with a well-distributed hole pattern. The nanomasks have been controlled by adjusting the alignments of MoS 2 . The exposed MoO 2 surfaces of c -MoO 2 @MoS 2 were further sulfurated to give cw -MoO 2 @MoS 2, in which all surfaces of MoO 2 are wrapped by a few layers of MoS 2 . The structure synergistically enhanced the electrochemical performances of MoO 2 and MoS 2, especially at high current rates. Reversible capacities of 1418 and 295 mAh/g after 115 and 300 cycles still remained for the cw -MoO 2 @MoS 2 anodes at current rates of 1 and 10 A/g, respectively.