片状花形ZnO制备及其对三甲胺的气敏性能  

Synthesis of Sheet-assembled Flower-like ZnO and Its Gas Sensing Properties to Trimethylamine

作　　者：宋金玲[1] 任文强[1] 张胤[1] 

机构地区：[1]内蒙古科技大学材料与冶金学院,包头内蒙古014010

出　　处：《过程工程学报》2014年第6期1058-1062,共5页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:21407084);内蒙古自治区自然科学基金资助项目(编号:2014BS0509);内蒙古自治区教育厅高等学校基金资助项目(编号:NJZY13141)

摘　　要：采用低温水热法制备了ZnO材料,通过X射线衍射仪和扫描电镜分别对其结构和形貌进行了表征,并采用气敏测试仪对所制ZnO材料对三甲胺的气敏性进行了测试.结果表明,所得的ZnO材料具有六方纤锌矿结构,呈片状花形.此材料在340℃,对体积分数为1.00×10-4三甲胺气体的灵敏度可达到63.72.随着三甲胺浓度的增加,灵敏度呈现线性增加的趋势.响应时间和恢复时间分别为4 s和21 s.此外,该样品具有呈现良好的选择性、重复性和长期稳定性.The ZnO material was prepared by low temperature hydrothermal method.The structure and morphology were characterized by XRD and SEM.And the trimethylamine-sensing properties of prepared ZnO were measured by the gas sensing instrument.The results show that the prepared ZnO material exhibits hexagonal wurtzite structure and sheet-assembled flower-like morphology.Moreover,its sensitivity can reach 63.72 towards 1.00×10^-4 trimethylamine at 340 ℃.The sensitivity increases linearly with increasing of the trimethylamine concentration.The response time and recovery time are 4 s and 21 s,respectively.In addition,the material shows excellent selectivity,repetition property and long-term stability.

关 键 词：ZNO 三甲胺 水热法 气敏性能 

分 类 号：TQ174[化学工程—陶瓷工业]