具有纳米结构的海胆形氧化锌的制备及其酒敏性能  

Synthesis and Ethanol Sensing Properties of Sea-Urchin-Like ZnO Nanostructures

作　　者：李丽[1] 潘海玲[1] 王坤[1] 黄宇晴[1] 

机构地区：[1]新疆大学化学化工学院,乌鲁木齐830046

出　　处：《传感技术学报》2012年第9期1210-1215,共6页Chinese Journal of Sensors and Actuators

基　　金：新疆维吾尔自治区高校科研重点项目(XJEDU2009I01)

摘　　要：以Zn(Ac)2.2H2O为原料,NH3.H2O为络合剂,在NaBH4辅助下140℃水热反应2 h制备出海胆形ZnO颗粒。采用X射线衍射仪和扫描电镜对产物进行表征。海胆形ZnO颗粒的直径约为3μm～17μm,它是由直径约为100 nm,长度约为500 nm～3μm的ZnO纳米棒自组装而成。研究了NaBH4物质的量,反应温度和时间对产物形貌的影响,结果表明,NaBH4在海胆形ZnO颗粒的形成过程中起着关键作用,提出了可能的生长机理。气敏测试结果表明,海胆形ZnO纳米颗粒在350℃对低浓度的乙醇气体具有快速敏感的传感性能。The sea-urchin-like ZnO nanostructure were obtained by a simple hydrothermal reaction of Zn（Ac）2 with NH3 and NaBH4 at 140 ℃ for 2 h.The products were characterized by X-ray diffraction and scanning electron microscopy.The results showed that the sea-urchin-like ZnO nanostructure with the diameters of 3 μm^17 μm are assembled from one-dimensional nanorods with the diameter and length of 100 nm and 500 nm^3 μm.The effects of NaBH4 dosage,reaction temperature and time to control the morphology of ZnO nanostructure were investigated.It was found that NaBH4 was a key factor to the formation of the sea-urchin-like ZnO nanostructure.A Possible growth mechanism of the sea-urchin-like ZnO nanostructure were proposed.Gas-sensing results show that sea-urchin-like ZnO nanostructure have good response to ethanol vapor with low concentration at 350 ℃.

关 键 词：ZNO 海胆形 气敏性能 

分 类 号：O649[理学—物理化学]