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以Zn(NO3)2.6H2O和NaOH为原料,CTAB为表面活性剂,微波加热到90℃,反应30min,成功制备了ZnO纳米棒。X射线衍射仪(XRD)和扫描电镜(SEM)结果表明,产物是六方纤锌矿结构ZnO纳米棒,长度为1~5μm,直径为50~100nm左右。对ZnO纳米棒进行了Pt掺杂,并对掺杂前后的气敏性能进行了对比研究。与未掺杂Pt的ZnO纳米棒相比,掺杂Pt的ZnO纳米棒对H2S气体的灵敏度和选择性大幅提高,在工作温度为273℃时,对体积分数为50ppm(10-6)的H2S灵敏度为480.44。这些结果说明,Pt掺杂的ZnO纳米棒是有潜力的探测H2S气体的气敏传感器材料。
Zn (NO3) 2.6H2O and NaOH as raw materials, CTAB as surfactant, microwave heating to 90 ℃, the reaction for 30min, successfully prepared ZnO nanorods. X-ray diffraction (XRD) and scanning electron microscopy (SEM) results show that the product is a hexagonal wurtzite ZnO nanorods, a length of 1 ~ 5μm, a diameter of about 50 ~ 100nm. The Pt nanorods were doped with Pt, and the gas sensitivities before and after doping were compared. Compared with undoped Pt-doped ZnO nanorods, the sensitivity and selectivity of the Pt-doped ZnO nanorods to H2S gas are greatly improved. When the working temperature is 273 ℃, the H2S concentration of 50ppm (10-6) Sensitivity is 480.44. These results indicate that Pt-doped ZnO nanorods are potential gas sensor materials for H2S gas detection.