文摘
The sensing potential of CuO nanoparticles synthesized via precipitation from a water/ionic liquid precursor (ILP) mixture was investigated. The particles have a moderate surface area of 66 m2/g after synthesis, which decreases upon thermal treatment to below 5 m2/g. Transmission electron microscopy confirms crystal growth upon annealing, likely due to sintering effects. The as-synthesized particles can be used for ethanol sensing. The respective sensors show fast response and recovery times of below 10 s and responses greater than 2.3 at 100 ppm of ethanol at 200 掳C, which is higher than any CuO-based ethanol sensor described so far.
Keywords:
ionic liquids; ionic liquid precursors; tetrabutylammonium hydroxide; nanoparticles; CuO; gas sensing