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以锌粒、浓硝酸和氢氧化钠为原料,聚乙二醇400为表面活性剂,采用水热法制备纳米ZnO粉体。利用X射线衍射和扫描电镜对产物的结构和微观形貌进行表征。将合成材料制备成旁热式气敏元件,采用静态配气法对乙醇、丙酮、甲醇、二甲苯、甲苯和氨水等进行气敏性能测试。结果显示:ZnO纳米粉体对乙醇、丙酮和甲醇表现出良好的敏感性,具有较快的响应和脱附速度,且灵敏度与浓度呈良好的线性关系。
Zinc tablets, concentrated nitric acid and sodium hydroxide as raw materials, polyethylene glycol 400 as a surfactant, prepared by hydrothermal nano-ZnO powder. The structure and morphology of the product were characterized by X-ray diffraction and scanning electron microscopy. The synthesized materials were prepared as side-heated gas sensors, and the static gas distribution method was used to test the gas sensitivity of ethanol, acetone, methanol, xylene, toluene and ammonia. The results show that the ZnO nanopowder has good sensitivity to ethanol, acetone and methanol, has a faster response and desorption rate, and the sensitivity has a good linear relationship with the concentration.