Abstract
The development of gas sensors with high sensitivity and low operating temperatures is essential for practical applications in environmental monitoring and industrial safety. SnO(2)-based gas sensors, despite their widespread use, often suffer from high working temperatures and limited sensitivity to H(2) gas, which presents significant challenges for their performance and application. This study addresses these issues by introducing a novel SnO(2)-based sensor featuring a three-dimensional (3D) nanostructure, designed to enhance sensitivity and allow for room-temperature operation. This work lies in the use of a 3D anodic aluminum oxide (AAO) template to deposit SnO(2) nanoparticles through ultrasonic spray pyrolysis, followed by modification with platinum (Pt) nanoparticles to further enhance the sensor's response. The as-prepared sensors were extensively characterized, and their H(2) sensing performance was evaluated. The results show that the 3D nanostructure provides a uniform and dense distribution of SnO(2) nanoparticles, which significantly improves the sensor's sensitivity and repeatability, especially in H(2) detection at room temperature. This work demonstrates the potential of utilizing 3D nanostructures to overcome the traditional limitations of SnO(2)-based sensors.