Enhanced triethylamine sensing properties by designing α-Fe2O3/α-MoO3 nanostructure directly grown on ceramic tubes

Over the years, efforts have been made to develop simple and efficient techniques for the detection of triethylamine (TEA). In this task, to solve the problem that the powder is easy to fall off existing in the conventional MoO3 sensor preparation method, we directly grow α-MoO3 nanosheets with high TEA sensing response on Al2O3 tubes through seed layer assisted growth technology and hydrothermal method. Furthermore, to enhance the gas monitoring performance of α-MoO3 sensing element，nano-scale α-Fe2O3 particles were deposited on α-MoO3 nanosheets through PLD method, and the binary composite nanostructured materials were designed and fabricated. The morphology as well as the structure of the α-Fe2O3/α-MoO3 materials have been characterized by XRD, SEM, TEM, HRTEM, XPS, and UPS, etc. The α-Fe2O3/α-MoO3 sensors exhibit superior performance to triethylamine than the pristine α-MoO3 sensor, such as enhanced sensitivity and excellent stability. The mechanisms of enhanced sensing properties are discussed from t...