Gas sensor based on cobalt-doped 3D inverse opal SnO2 for air quality monitoring

In this research, a semiconductor metal oxide (SMO)-based gas sensor was designed for the ultrasensitive and tunably selective detection of formaldehyde and acetone. Cobalt-doped 3D inverse opal SnO2 multilayer films (3D IO Co-SnO2 MFs) used as sensing materials were prepared with the ultrasonic nebulizing deposition (UND) method combined with a self-assembly template. The 3D IO Co-SnO2 (Co/Sn = 1:24 atom%) MF-based sensor exhibited a much...