Construction of hierarchical Co, Fe Co-doped MoS2/polypyrrole heterostructure as an efficient bifunctional catalyst for enzyme-like and nitrophenol catalysis

• Published in: Colloids and surfaces. A, Physicochemical and engineering aspects Physicochemical and engineering aspects, 2022-12, Vol.655, p.130225, Article 130225
• Main Authors: Yang, Liting, He, Xiaoying, Xu, Jingli, Yin, Xue-Bo, Zhang, Min
• Format: Article
• Language: English
• Subjects: 4-nitrophenol reduction; Enzyme-like catalysis; Fe doping; MoS2; Tubular structure
• ISSN: 0927-7757; 1873-4359
• DOI: 10.1016/j.colsurfa.2022.130225

Constructing tubular MoS2-based hybrid composites with heterostructure is effective for enhancing the catalytic performance of hybrid nanozymes. Herein, we present a multi-step “molecule/ion-exchange” strategy and post-sulfidation treatment to fabricate hierarchical microtubes by growing a Co, Fe co-doped MoS2 nanosheets(NSs) on polypyrrole(PPy) microtubes. The hierarchical tubular structure provides fast transport pathways for electrons, and the voids effectively facilitate mass diffusion. Owing to their synergistic effect between their unique tubular PPy structure and hierarchical Co, Fe co-doped MoS2 NSs, the Co, Fe-MoS2 @PPy microtubes exhibited extraordinary activity and stability in the reduction of 4-nitrophenol as well as peroxidase-like catalysis. Moreover, this dual transition metal doped approach would give novel inspiration for designing and synthesizing other tubular MoS2-based composites with tailored compositions, which could be used as a promising candidate for other energy-related applications. [Display omitted] •The Co, Fe-MoS2 @PPy microtubes were synthesized through a facile self-sacrifice template method.•Cobalt and Fe elements are well doped in the MoS2 @PPy in the process of sulfidation.•The Co, Fe-MoS2 @PPy microtubes exhibited high activity on peroxidase-like catalysis and 4-nitrophenol reduction.