盆景状ZnO的制备及气敏性能研究  

Synthesis of Bonsai-like ZnO and Its Gas Sensing Properties

作　　者：张永辉[1] 刘春彦[1] 刘焕桢 巩飞龙[1] 李峰[1] ZHANG Yonghui LIU Chunyan LIU Huanzhen GONG Feilong LI Feng(Zhengzhou University of Light Industry, State Laboratory of Surface and Interface Science and Technology, Zhengzhou 450001, China)

机构地区：[1]郑州轻工业学院河南省表界面科学重点实验室,河南郑州450001

出　　处：《郑州大学学报（工学版）》2016年第5期23-26,32,共5页Journal of Zhengzhou University（Engineering Science）

基　　金：国家自然科学基金资助项目(21371157;21301158);河南省重点科技攻关资助项目(132102210424);河南省科技创新人才计划项目(豫科人组2015-4号);骨干教师项目(2012XGGJS04;2014GGJS-081);郑州轻工业学院校内基金(2014XJJ001)

摘　　要：通过水热法首次制备出盆景状三维材料,XRD和热分析测试结果表明制备的材料由碱式碳酸锌(Zn_4CO_3(OH)_6·H_2O)和ZnO组成,产物经过高温煅烧后得到结晶性良好且侧面和底部孔状结构的ZnO材料.利用FESEM对材料的形貌进行了系统的表征,发现盆景状ZnO由纳米片自组装对称生长而成,且每一层生长都会得到规则的六边形结构.将材料制备成气敏元件并研究其气敏性能.结果表明,构筑的气敏元件在340℃时对乙醇气体具有最高的灵敏度,同时具有良好的响应-恢复特性和稳定性.该材料可以应用于改善基于乙醇传感器的设计与制作.3D bonsai-like ZnO materials with defects on their surfaces have been prepared via a hydrothermal method and a subsequent annealed process for the first time. The characterization of X-ray diffraction（ XRD）and TG / DTA suggest that the as-prepared samples are composed with ZnO and Zn5（CO3）2（ OH）6. We carefully investigate the morphology of our materials by field emission scanning electronmicroscopy（ FESEM）. The result shows that the nanosheets grow symmetrically with a self-assmble process to form every hexagon generation resulting in 3D bonsai-like ZnO structure. Then we fabricate the gas sensor with our ZnO materials and study their gas sensing properties systematically. The results indicate that the as-prepared gas sensor behave the highest sensitivity to 100 ppm ethanol vapor at 340 ℃,meanwhile it also exhibits an excellent response-recover property and stability. The 3D bonsai-like ZnO materials have a great potential to design and fabricate ethanol gas sensor in the future.

关 键 词：ZNO 盆景状 水热法 纳米片 气体传感器 

分 类 号：O614.241[理学—无机化学] O611.62[理学—化学]