Fabrication of mesoporous SnO 2 nanocubes with superior ethanol gas sensing property

Abstract In this study, mesoporous SnO 2 nanocubes with tunable sizes are fabricated by a facile hydrothermal route and a subsequent acid etching process. The SnO 2 nanocubes with large surface area and rich porosity exhibits superior gas sensing property toward ethanol in terms of ultrahigh sensitivity (response of 1670.5 to 100 ppm and ∼72 to 1 ppm ethanol), fast response times (23 s) and recovery times (21 s), excellent selectivity as well as relative low working temperature of 200 °C. The superior gas sensing performance of as-fabricated SnO 2 nanocubes might be promising in many practical applications.