Sensing mechanism of Ag/α‐MoO ₃ nanobelts for H ₂ S gas sensor

Abstract Sensing mechanism is still a big problem in the field of gas sensor. In‐depth study of the sensing mechanism can provide better ideas for the design of sensing materials, and it is also more conducive to the improvement in gas‐sensing performance. In this work, Ag/α‐MoO 3 material was obtained by loading Ag in α‐MoO 3 nanobelts prepared by hydrothermal method. The material was characterized by field electron scanning electron microscopy (SEM), high‐resolution transmission electron microscopy (HRTEM), X‐ray diffraction (XRD) and X‐ray photoelectron spectroscopy (XPS). Comparing the gas sensing properties of α‐MoO 3 and Ag/α‐MoO 3 , it is found that Ag effectively improves the selectivity of the material to H 2 S at 133 °C. The response of the…