摘要
Petal-like ZnO nanosheets were synthesized with zinc nitrate hexahydrate and sodium hydroxide as starting materials in ammonia and ethanol mixture solution. RuO2 modified ZnO nanosheets were also prepared by a calcination route. The as-prepared products were characterized by X-ray powder diffraction and field emission scanning electron microscopy, and its specific BET surface area was calculated by nitrogen adsorption method. The sensitivity, response and recovery speed were examined. The results show that RuO2 modified petal-like ZnO based sensor exhibits a high sensitivity, a low detection limit, fast response and recovery properties to ethanol and acetone. The sensitivities of the RuO2 modified petal-like ZnO based sensor to 100×10^-6 ethanol and acetone at 360 °C are 33 and 67, respectively. The response and recovery times of the sensor are 4 s and 9 s to 10×10^-6 ethanol, and are 3 s and 10 s to 10×10^-6 acetone, respectively.
以硝酸锌、氢氧化钠为原料,通过水热/煅烧法制备结构新颖的厚度在20 nm至40 nm之间的钌掺杂花瓣状氧化锌纳米片。采用粉末X射线衍射仪、场发射扫描电镜、氮气吸附法、气敏测试系统对产物进行物相、结构形貌、比表面积、气敏性能等的表征。结果表明,钌掺杂氧化锌纳米片对乙醇和丙酮气体的灵敏度高,探测浓度低,响应和恢复迅速。在360°C和100×10-6的条件下,对乙醇和丙酮的灵敏度分别达到33和67。在10×10-6的乙醇和丙酮气体中,其响应和恢复速度分别为4 s和9 s,3 s和10 s.
基金
Projects(61079010)supported by the National Natural Science Foundation of China and the Civil Aviation Administration of China
Project(3122013P001)supported by the Significant Pre-research Funds of Civil Aviation University of China
Project(2014)supported by the Science and Technology Innovation Guide Funds of Civil Aviation Administration of China
