Template-free preparation of mesoporous single crystal In2O3 achieving superior ethanol gas sensing performance

Abstract

Mesoporous single crystal indium oxide (In₂O₃) has been successfully prepared via a hydrothermal annealing route in the absence of templates and surfactants. An In₂O₃ mesoporous single crystal has larger surface areas and smaller pore diameter, and thus exhibits better ethanol gas sensing properties than mesoporous In₂O₃ with a large pore diameter which was prepared by adjusting the pH value.