氧化锌掺杂铝纳米片的制备及其气敏性能研究

Preparation and gas sensing properties of Al-doped ZnO nanosheets

采用水热法,以油酸为形貌控制剂,硝酸铝为铝源,制备了氧化锌掺杂铝纳米片,对其进行了XRD、SEM和EDS表征。考察了制备物对甲醇、乙醇、丙酮、异丙醇、正丁醇、DMF等六种气体的气敏性能,并对其气敏机理进行了简要分析。结果表明,掺杂3%Al的ZnO样品晶粒尺寸变小,为带微孔的层状纳米片,EDS能谱表明样品含有Zn、O和Al元素。样品对正丁醇、丙酮的灵敏度较高,100ppm时分别为164和70,对丙酮的响应和恢复时间分别为7s和29s。

Al3＋ doped ZnO nanosheets were prepared by the hydrothermal method, using oleic acid as shape contro- ling agent and Aluminum nitrate as doping source. The products were characterized by XRD, SEM and EDS. The gas sens- ing properties of the products to methanol, ethanol, acetone, isopropanol, n-butanol and DMF were also studied. The gas sensing mechanism was briefly analysised. The results showed that 3% Al doping product had a smaller grain size and a multilayered nanosheet morphology with some porous architectures. EDS spectroscopy showed that the materials contained Zn, O and Al element. The nanomaterials had good response to n-butanol and acetone. The gas sensitivity was nearly up to 164 and 70 to 100ppm n-butanol and acetone, respectively. The response and recovery time for acetone was 7 and 29 s, re- spectively.