ZnOPPy异质纳米复合材料的制备、表征及其气敏特性.pdfVIP

[Article] 物理化学学报(Wuli Huaxue Xuebao) Acta Phys. -Chim. Sin. 2015, 31 (4), 800-806 April Received: December 12, 2014; Revised: Janaury 27, 2015; Published on Web: January 28, 2015. ∗Corresponding author. Email: wangjing@; Tel: +86-411 Fax: +86-411 The project was supported by the National Natural Science Foundation of China . 国家自然科学基金资助项目 © Editorial office of Acta Physico-Chimica Sinica doi: 10.3866/PKU.WHXB201501283 ZnO/PPy异质纳米复合材料的制备、表征及其气敏特性 杜海英 1,2 王 兢 1,* 乔 俏 1 孙炎辉 1,2 邵 强 2 李晓干 1 (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) 摘要: 室温下,采用原位聚合法,以吡咯(PY)为单体,氯化铁(FeCl3∙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ZnO种子,将表面种有ZnO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ZnO纳米棒,合成了PPy/ZnO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/ZnO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/ZnO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/ZnO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/ZnO异质纳米复合材料的形成机理进行了简要分析. 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 中图分类号: O649 Synthesis and Characterization of ZnO/PPy Hetero-Nanocomposites and Their Gas Sensing Properties DU Hai-Ying1,2 WANG Jing1,* QIAO Qiao1 SUN Yan-Hui1,2 SHAO Qiang2 LI Xiao-Gan1 (1School of Electronic Science and Technology, Dalian University of Technology, Dalian 116023, Liaoning Province, P. R. China; 2College of Electromechanical Information Engineering, Dalian Nationalities University, Dalian 116600, Liaoning Province, P. R. China) Abstract: Pyrrole (Py) was oxidized by ferric(III) 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 °C. 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 ba