A MOF-derived porous In2O3 flower-like hierarchical architecture sensor: near room-temperature preparation and fast trimethylamine sensing performance

We have successfully prepared a metal-organic-framework (MOF) derived In2O3 flower-like hierarchical architecture sensor using a near room-temperature template-free strategy and a subsequent accurate annealing process. The In2O3 flower-like hierarchical architecture sensor exhibits good sensitivity to trimethylamine. The fabricated sensor has a relatively low working temperature of 140 degrees C, a response of 35.2 for 20 ppm trimethylamine, a response time as fast as 2 s, and good selectivity and stability. In addition, the sensor exhibits good conductivity. The sensor's enhanced gas sensing performance can be attributed to the synergistic effect of its unique flower-like hierarchical architecture, porous hierarchical morphology and abundant oxygen vacancies. Furthermore, the possible growth mechanism and the gas sensing mechanism are also discussed in detail.

Automated summary

We have successfully prepared a metal-organic-framework (MOF) derived In2O3 flower-like hierarchical architecture sensor using a near room-temperature template-free strategy and a subsequent accurate annealing process. The In2O3 flower-like hierarchical architecture sensor exhibits good sensitivity to trimethylamine, with a relatively low working temperature of 140 degrees C and a response of 35.2 for 20 ppm trimethylamine. The sensor's enhanced gas sensing performance can be attributed to the synergistic effect of its unique flower-like hierarchical architecture, porous hierarchical morphology, and abundant oxygen vacancies.