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以纯Zn和Zn中掺杂Ag为原料在相同条件下用物理热蒸发法分别制备ZnO纳米线,对两种纳米线进行了SEM分析,并将其作为气敏基料制成旁热式气敏组件,对CO气体进行气敏性测试。结果表明,纯Zn制得的ZnO纳米线的形貌呈现放射状,分枝的直径均为约300nm、长度约10μm;而Zn中掺杂Ag制得的ZnO纳米线形貌虽也呈现放射状,但分枝的直径逐渐减小,最终成为点状,长度约3μm;在工作温度270℃下,两种纳米线对CO气体的灵敏度都达到最大值,且Zn中掺杂Ag相对于纯Zn的ZnO纳米线对CO气体灵敏度提高了61.5%;在CO浓度为0.27%时,两种纳米线的灵敏度也都达到最大值,Zn中掺杂Ag相对于纯Zn的ZnO纳米线对CO气体灵敏度提高了107.2%,也对CO气体的响应时间缩短了3s。
Pure Zn and Zn doped Ag as raw materials under the same conditions by physical thermal evaporation were prepared ZnO nanowires, two kinds of nanowires SEM analysis, and as a gas-sensitive material made of the next thermal gas-sensitive Assembly to gas-sensitively test CO gas. The results show that the morphology of ZnO nanowires prepared by pure Zn is radial, the diameter of branches is about 300nm, and the length is about 10μm. The morphologies of ZnO nanowires prepared by Zn doping are also radial, The diameter of the branches gradually decreases and finally becomes a dot with a length of about 3 μm. At the working temperature of 270 ° C, the sensitivities of the two nanowires to the CO gas reach the maximum, and the content of Ag in the Zn relative to that of the pure Zn The sensitivities of the nanowires to CO gas were increased by 61.5%. At the CO concentration of 0.27%, the sensitivities of the two nanowires also reached their maximum values. The sensitivity of the ZnO nanowires doped with Ag relative to pure Zn to the CO gas was increased 107.2%, also shortened the response time of CO gas by 3s.