Study on Preparation of Au-loaded Co-doped ZnO Hierarchical Microspheres and Their Acetone Gas Sensing Properties
Au-loaded Co-doped ZnO hierarchical microspheres were prepared by one-step hydrothermal method,and their morphology and structure were characterized.The effects of Au loading and Co doping on the gas sensing properties of ZnO hierarchical microspheres were studied.The results showed that for 100×10-6 acetone,Au-loaded Co-doped ZnO hierarchical microspheres had lower optimum operating temperature(160℃)and higher responsivity(232)than pure ZnO hierarchical microspheres,and had faster response recovery speed and better gas selectivity.The gas sensing enhancement mechanism of Au loading and Co doping was further discussed.
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