Interfacing Ag<sub>2</sub>S Nanoparticles and MoS<sub>2</sub> Nanosheets on Polypyrrole Nanotubes with Enhanced Catalytic Performance
Ziqi Jin, Huanhuan Li, Lei Zhang, Jianmin Pan, Jingli Xu, Xue‐Bo Yin, Min Zhang
Abstract
The tubular architecture with multiple components can bring synergistic effects to improve the enzyme-like activity of molybdenum-based nanomaterials. Here, a facile polypyrrole (PPy)-protected hydrothermal sulfidation process was implemented to engineer MoS 2 /Ag 2 S heterointerfaces encapsulated in one-dimensional (1D) PPy nanotubes with MoO 3 @Ag nanorods as the self-sacrificing precursor. Notably, the sulfidation treatment led to the generation of MoS 2 nanosheets (NSs) and Ag 2 S nanoparticles (NPs) and the creation of a tubular structure with a “kill three birds with one stone” role. The Ag 2 S/MoS 2 @PPy nanotubes showed the synergistic combined effects of Ag 2 S NPs, MoS 2 NSs, and the 1D tube-like nanostructure. Based on the synergistic effects from these multiple components and the tubular structure, Ag 2 S/MoS 2 @PPy nanocomposites were used as a colorimetric sensing platform for detecting H 2 O 2 . Moreover, the reduction of 4-nitrophenol (4-NP) revealed excellent catalytic activity in the presence of NaBH 4 and Ag 2 S/MoS 2 @PPy nanocomposites. This work highlights the effects of MoS 2 /Ag 2 S heterointerfaces and the hierarchical tubular structure in catalysis, thereby providing a new avenue for reducing 4-NP and the enzyme-like catalytic field.