1D-ordered mesoporous corncob-like Mo2C carbon nanotubes loaded with FeMnO3 hollow porous nanospheres as an efficient electrochemical sensing platform for rutin detection

Abstract

One-dimensional (1D) ordered mesoporous carbon hybrid nanotubes loaded with bimetallic oxide hollow nanospheres are expected to be very attractive electrocatalysts. In this study, through high-temperature pyrolysis, we generated Mo2C@C PNTs with outstanding electrical conductivity, a significant surface area, and effective catalytic activity by wrapping ordered mesoporous polypyrroles on the surface of 1D MoO3 nanotubes using block polymers that self-assembled. FeMnO3 hollow porous nanospheres have a large specific surface area, many electroactive sites, and excellent molecular/charge diffusion properties, which can be compounded with 1D ordered mesoporous nitride-rich carbon to solve the problem of poor electrical conductivity of metal oxides and to prevent the accumulation of 1D nanotubes. The composite showed excellent electrocatalytic activity towards rutin due to the synergistic interaction between Mo2C@C PNTs and FeMnO3. In the best case, rutin has a limit of detection (LOD) as low as 0.35 × 10−9 M and a wide linear range (3 ×10−9 to 3.1 ×10−6 M). The sensor displays a remarkable level of selective response to rutin in the presence of other co-interfering species. Furthermore, it has superb repeatability and reproducibility. The sensor has shown outstanding recovery (95.7–104.1 %) in the practical viability of detecting rutin in beverages. This work not only provides a new candidate for the accurate detection of rutin but also provides insight into the exploration of advanced sensing materials.