ZnO/PPy异质纳米复合材料的制备、表征及其气敏特性(英文)  

Synthesis and Characterization of ZnO/PPy Hetero-Nanocomposites and Their Gas Sensing Properties

作　　者：杜海英[1,2] 王兢[1] 乔俏[1] 孙炎辉[1,2] 邵强[2] 李晓干[1] 

机构地区：[1]大连理工大学电子科学与技术学院,辽宁大连116023 [2]大连民族学院机电信息工程学院,辽宁大连116600

出　　处：《物理化学学报》2015年第4期800-806,共7页Acta Physico-Chimica Sinica

基　　金：supported by the National Natural Science Foundation of China(61176068,61131004,61474012)~~

摘　　要：室温下,采用原位聚合法,以吡咯(PY)为单体,氯化铁(Fe Cl3 6H2O)为氧化剂,在塑料基片上聚合生长了聚吡咯(PPy)纳米微球.然后在聚吡咯基片上生长Zn O种子,将表面种有Zn O种子的PPy元件置于六次甲基四胺与硝酸锌的混合溶液中,90°C水浴中,在PPy微球上生长了Zn O纳米棒,合成了PPy/Zn O异质纳米复合材料.分别通过X射线衍射仪(XRD)和场发射扫描电镜(FESEM)对PPy/Zn O异质纳米复合材料的结构和形貌进行了表征.制备了塑料基的PPy/Zn O异质纳米复合材料气体传感器,在室温下,对10×10-6-150×10-6(体积分数)浓度范围的氨气进行了气敏测试,PPy/Zn O气敏元件对氨气响应的灵敏度基本呈线性关系,且对甲醇、丙酮、甲苯等有机气体表现出很好的选择性.最后,对PPy/Zn O异质纳米复合材料的形成机理进行了简要分析.Pyrrole （Py） was oxidized by ferric（Ill） chloride solution in water for the synthesis of polypyrrole （PPy） nanoparticles on the substrate slide by in-situ polymerization at room temperature. Zinc oxide nanorods grew on the PPy nanoparticles when in a water bath at 90 ℃. ZnO/PPy hetero-nanocomposites were obtained by a hydrothermal method and characterized using X-ray diffraction （XRD） and field emission scanning electron microscopy （FESEM）. Gas sensors were fabricated based on the ZnO/PPy hetero-nanocomposites to detect ammonia at room temperature. The gas sensing properties of these hetero-nanocomposites were measured in the concentration range of 10×10-6-150 × 10-6 （volume fraction）. The relationship of the sensitivity of the sensors to the ammonia concentration showed linearity. The gas sensor based on ZnO/PPy hetero- nanocomposites showed good selectivity to ammonia when in the presence of interfering gases such as methanol, acetone, and toluene. The formation mechanism of the ZnO/PPy hetero-nanocomposites was briefly analyzed.

关 键 词：原位聚合法 异质纳米复合物 气体传感器 气敏特性 形成机理 

分 类 号：O633.5[理学—高分子化学] TB332[理学—化学]