High gas sensitivity of pure CdIn2O4 hollow spheres for hydrocarbons

The gas sensitivity of pure CdIn2O4 hollow spheres for hydrocarbons was measured and the effect of morphologies on gas sensing was investigated. The dependence of sensitivities on the concentration of C2H5OH and the response and recovery characteristics of CdIn2O4 had been studied. The gas sensitivity of CdIn2O4 hollow spheres on exposure to 50 ppm of C2H5OH was measured to be 2.5 times that of the material obtained by grinding the spheres. Though the response and recovery times of CdIn2O4 hollow spheres are a little longer than that of the sample after grinding, the gas sensitivity of CdIn2O4 hollow spheres is much higher than that of the sample after grinding within the same reaction time. Moreover, a plausible transient responding mechanism on CdIn2O4 hollow spheres was proposed.

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