采用沉淀法制备出Pd/SnO2的纳米复合材料,分别利用SEM、XPS和XRD对样品表面形貌、元素化学态和晶体结构进行分析表征;利用浆液法制备旁热式平面传感元器件,利用恒电位法测试了样品的在氢敏性能.结果表明,用此种方法制备的Pd/SnO2的纳米复合材料在室温下具有良好的氢气敏感性能,且对H2具有较好的选择性,同时对不同浓度的H2具有良好的灵敏性且随着H2浓度的变化有一定的线性关系.
Pd doped on SnO2 were prepared by deposition.The morphology,surface chemistry and crystal structure of these nanoparticles were characterized by SEM,XPS and XRD.Planar indirectly heated sensor components were prepared by Pd-doping SnO2 suspension.The hydrogen-sensing properties of the as-prepared samples were investigated by potentiostatic method.The results show that Pd-doping SnO2 have excellent hydrogen sensing properties and choice under the room temperature.At the same time,it has good sensitivity with differ ent H2 concentrations,presenting a certain linear relationship with the change of H2 concentration.
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