Abstract
The surperconductive C-loaded CuO-CeO2 catalyst was fabricated by a high temperature solid phase reaction. The catalyst was annealed at 500 °C for 4 h then was characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM), respectively. The results showed that the as-prepared catalyst was consisted of the particles with the size of 20–50 nm. The gas sensing properties of the superconductive C-loaded CuO-CeO2 to CO were investigated at room temperature. In addition, the as-prepared catalyst exhibited superior activity toward CO. The sensor shows characteristics of a practical-use level: range, 0.1–1000 ppm; sensitivity, 192 mV/ppm; response time, 9 s.
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