Metal-organic framework-derived hierarchical flower-like Mo-doped Co3O4 for enhanced triethylamine sensing properties

Metal-organic frameworks (MOFs) derived oxide semiconductors have drawn more and more attention in many fields due to their unique structural merits. Herein, hierarchical flower-like Mo-doped Co3O4 derived Co-MOF has been synthesized through a solvothermal method and following annealing process. The gas sensing measurements show that the sensing properties of Mo-doped Co3O4 sample are far superior than that of pure Co3O4. In particular, 1 at% Mo-doped Co3O4 sample exhibits high response values of 92-50 ppm TEA at 180 degrees C, which are about 46 times than that of pure Co(3)O(4 )Sample. In addition, it shows short recovery time (33 s), excellent gas selectivity, good repeatability and long-term stability. The improved gas sensing performance can be ascribed to Mo doping and hierarchical flower-like microstructure. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

The Mo-doped Co3O4 sample showed superior gas sensing performance compared to pure Co3O4, with high response values, short recovery time, excellent gas selectivity, and long-term stability. This improved performance is attributed to Mo doping and hierarchical flower-like microstructure.