Mesoporous SnO₂ Nanowires: Synthesis and Ethanol Sensing Properties

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The mesoporous SnO 2 nanowires composed of nanoparticles and nanopores have been successfully synthesized within the nanochannels of anodic alumina oxide templates by a facile sol-gel method. XRD, SEM, and HRTEM were used to characterize the synthesized mesoporous SnO 2 nanowires. The sensing property of the mesoporous SnO 2 nanowires in ethanol detection also has been studied. The as-prepared product displays excellent the high sensitivity, rapid response, and excellent repeatability to ethanol. The detection limit of the mesoporous SnO 2 nanowires to ethanol reaches 1 ppm. The sensing mechanism of the mesoporous SnO 2 nanowires has been further discussed. It is expected that the mesoporous SnO 2 nanowires might become a good sensing material for promising industrial applications.