Abstract
In this work, a series of CdGa2O4 nanospheres were synthesized by the solvothermal-calcination method. Various characterization technologies were used to analyze the crystal structure, morphology, specific surface area and elemental composition of the as-prepared materials. The gas sensing performance of CdGa2O4 nanospheres were investigated. The influence of calcining temperature on the gas sensing properties of CdGa2O4 nanospheres were studied. The results showed that the CdGa2O4 material (CGO-3) synthesized at the calcination temperature of 700 °C had the highest sensitivity of 99 to 100 ppm formaldehyde at 140 °C. In addition, it exhibited ultra-low detection limit which could reach 0.1 ppb.
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