Acetone gas sensing properties of NiO particle-decorated TeO2 nanorod sensors

초록

TeO2 nanorods decorated with NiO nanoparticles were synthesized by the thermal evaporation of Te powder followed by solvothermal deposition of NiO and their acetone gas sensing properties were examined. The pristine and NiO-decorated TeO2 nanorods exhibited responses of ~262% and ~601%, respectively, to 500 ppm acetone at 125oC. The pristine and NiO-decorated TeO2 nanorod sensors showed the strongest response to acetone gas at 150oC and 125oC, respectively. The NiO-decorated TeO2 nanorod sensor showed selectivity to acetone gas over other volatile organic gases such as methane, toluene, benzene, and LPG at 125oC. The underlying mechanism for the enhanced response of the NiO-decorated TeO2 nanorod sensor to acetone gas is discussed.