One-step synthesis of NiTe2 nanorods coated with few-layers MoS2 for enhancing photocatalytic activity.

A facile one-step hydrothermal process was developed for fabrication of three-dimensional hierarchical NiTe2@MoS2 heterostructures. A few layers of MoS2 uniformly grew on the NiTe2 nanorods, possessing a higher surface area. The strategy was extended to CoTe2@MoS2 heterostructures with a few layers of MoS2. The photocatalytic activities of the heterostructures were evaluated by the photodegradation of methylene blue. The composites show strong adsorption ability and much better photocatalytic efficiency in comparison with pure MoS2 microflowers and NiTe2 nanorods. Especially, the NiTe2@MoS2 heterostructure with 40 wt% of MoS2 presents the highest performance in photocatalytic degradation of dye molecules, which is attributed to the formation of hierarchical network between NiTe2 nanorods and MoS2 nanosheets. And the possible mechanism of the enhanced photocatalytic activities was discussed.