以酒石酸为燃料，硝酸锌为氧化剂，采用溶液燃烧法制备了 Pd (0~7％(原子分数))掺杂纳米ZnO.利用 X 射线衍射仪(XRD)、扫描电子显微镜(SEM)和荧光光谱仪对产物了进行表征，重点讨论了掺杂对 ZnO 气敏性能的影响.结果表明，在330℃测试条件下，纯 ZnO 和7％(原子分数)Pd 掺杂 ZnO 气敏元件对体积分数为5．0×10－5的乙醇气体灵敏度分别为21．4和11．2；元件对5．0× 10－5丙酮气体的灵敏度分别为2．0和8．8.Pd 掺杂显著提高了元件对乙醇和丙酮气体的选择性.
Pd doped nano-ZnO were prepared by solution combustion synthesis (SCS),using tartaric acid as fuel and zinc nitrate as oxidant.The samples were characterized by X-ray diffraction (XRD),scanning electron mi-croscope (SEM)and fluorescence spectroscopy,and the influence of Pd-doping on the gas sensing properties of ZnO was mainly discussed.The results indicate that at 330 ℃,the gas sensitivity of 0 and 7at% Pd-doped sen-sors to 5.0×10 -5 ethanol gas were 21.4 and 1 1.2,to 5.0×10 -5 acetone gas were 2.0 and 8.8,respectively.The selectivity of sensors to ethanol and acetone was significantly improved via Pd-doping.
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