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通过一个简单的水热方法成功地合成出由SnO2纳米片作次级结构的新型花状ZnSnO3-SnO2分级纳米结构。ZnSnO3多面体在生长分级SnO2纳米片的过程中主要起模版作用,制备出的SnO2纳米片的厚度约为25nm。还讨论了ZnSnO3-SnO2样品的形貌随反应时间变化的规律,并且进一步讨论了形成这种分级结构的形成机制。此外,由这种新型ZnSnO3-SnO2纳米结构作敏感材料的气体传感器对乙醇气体具有高灵敏和快响应的特点。ZnSnO3-SnO2纳米片在最佳工作温度270°C时,对50×10-6乙醇气体的灵敏度约为27.8,其响应和恢复时间分别在1s和1.8s内。
The novel flower-like ZnSnO3-SnO2 graded nanostructures with SnO2 nanosheets as secondary structure were successfully synthesized by a simple hydrothermal method. The ZnSnO3 polyhedrons mainly play the role of template in the growth of SnO2 nanosheets. The thickness of SnO2 nanosheets prepared is about 25nm. The morphology of ZnSnO3-SnO2 samples with different reaction time was also discussed, and the formation mechanism of this hierarchical structure was further discussed. In addition, the gas sensor made of this new ZnSnO3-SnO2 nanostructure as a sensitive material has the characteristics of high sensitivity and fast response to ethanol gas. The sensitivity of ZnSnO3-SnO2 nanosheets to 50 × 10-6 ethanol gas was about 27.8 at the optimum operating temperature of 270 ° C, and the response and recovery time were within 1s and 1.8s, respectively.