Highly sensitive and selective toluene sensor based on Ce-doped coral-like SnO2

Coral-like porous SnO₂ was synthesized by a simple hydrothermal treatment. 1.5% CeO₂-doped SnO₂ shows high response and selectivity to toluene, as the Ce-dopant can enhance its sensitivity. This good performance may contribute to the catalytic oxidation effect of CeO₂.