Fig. 6From: Facile Synthesis of Wormhole-Like Mesoporous Tin Oxide via Evaporation-Induced Self-Assembly and the Enhanced Gas-Sensing Propertiesa Responses of the mesoporous SnO2 sensors to 200 ppm ethanol at different operating temperatures, b responses vs. ethanol concentration, and c response-recovery curve for the mesoporous SnO2 sensors (the operating temperature is 200 °C). d Gas responses of the mesoporous SnO2 sensors to 200 ppm of ethanol, methanal, methanol, and acetone operated at 200 °CBack to article page