Ultrasensitive n-butanol gas sensor based on Bi 2 O 3-In 2 O 3 heterostructure

In this paper, Bi 2 O 3-In 2 O 3 heterostructure was designed and synthesized by a hydrothermal method. We first used this material for n-butanol sensing materials. In order to explore the potential application of the materials, their crystal structure, microstructure, and chemical state were characterized using XRD, TEM, and XPS. At the optimum operating temperature of 265 degrees C, the gas sensitive test shows that the response value of the composite containing 2.5 mol% Bi 2 O 3 to 100 ppm n-butanol can reach 63, and the response time is only 3 s. Furthermore, the composite demonstrates excellent recyclable stability. The p-n heterogeneous structure and abundant active sites make the sensor have excellent gas sensing performance. The successful preparation of Bi 2 O 3-In 2 O 3 heterostructure contributes to the realization of more sensitive heterostructure n-butanol gas sensor.