MOF-derived one-dimensional Ru/Mo co-doped Co3O4 hollow microtubes for high-performance triethylamine sensing

The construction of the materials with one-dimensional (1D) hollow structure using Metal-organic frameworks (MOFs) as the templates has attracted much attention for applied in various fields. Herein, MOF-derived 1D Ru/ Mo co-doped Co3O4 hollow microtubes have been obtained via a simple solvothermal method. The as-synthesized samples are characterized by using XRD, FESEM, TEM, XPS, PL and BET. The sensing measure-ment reveals that when doping amount of Mo and Ru is 1% and 0.3%, the Co3O4 sample exhibits the best sensing performance. Specially, 0.3% Ru/Mo-Co3O4 sample exhibits high responses of 126-100 ppm TEA at a low operating temperature of 160 degrees C, which are about 18.5 times than that of pure Co3O4. Furthermore, it shows rapid response/ recovery speed (5 s/7 s), good selectivity and repeatability as well as excellent long-term sta-bility. The good TEA sensing performance is attributed to the construction of 1D hollow architecture and syn-ergistic effect of Ru/Mo co-doping. Thus, it is expected to be a promising sensing material for high-performance detection of TEA gas. In addition, this work provides an useful inspiration for preparation of MOF-derived materials with 1D hollow architecture for achieving excellent performance in various fields.

Automated summary

One-dimensional hollow structure MOF-derived Ru/Mo co-doped Co3O4 hollow microtubes with excellent sensing performance were obtained through a simple solvothermal method. The 0.3% Ru/Mo-Co3O4 sample showed high responses to 126-100 ppm TEA at a low operating temperature of 160 degrees C, and displayed rapid response/recovery speed, good selectivity and repeatability, and excellent long-term stability. The construction of the 1D hollow architecture and the synergistic effect of Ru/Mo co-doping contributed to the good TEA sensing performance.