Reactive Template-Engaged Synthesis of NiS_<i>x</i>/MoS₂ Nanosheets Decorated on Hollow and Porous Carbon Microtubes with Optimal Electronic Modulation toward High-Performance Enzyme-like Performance

Abstract

As a promising cost-effective nanozyme, MoS 2 nanosheets (NSs) have been considered as a good candidate for the enzyme-like catalysis. However, their catalytic activity is still restricted by the insufficient active sites and poor conductivity, and thus, the comprehensive performances are still unsatisfactory. To address these issues, herein, we design and fabricate an intelligent tubular nanostructure of hierarchical hollow nanotubes, which are assembled by NiS x /MoS 2 NSs encapsulated into N-doped carbon microtubes (NiS x /MoS 2 @NCMTs). The N-doped carbon microtubes (NCMTs) serve as a conductive skeleton, integrating with NiS x /MoS 2 NSs and ensuring their well-distribution, thereby maximally exposing more active sites. Additionally, the tube-like structure is favorable for increasing the mass transfusion to ensure their excellent catalytic performance. Profiting from their component and structural advantages, the obtained NiS x /MoS 2 @NCMTs exhibit a surprisingly enhanced enzyme-like activity. Based on these, a facile colorimetric sensing platform to detect H 2 O 2 and GSH has been developed. This proposed approach can be expected to synthesize a series of tubular heterostructured MoS 2 -based composites, which will be widely applied in catalysis, energy storage, disease diagnosis, etc.