以Zn(Ac)2·2H2O为原料,NH3·H2O为络合剂,在NaBH4辅助下140℃水热反应2h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～ 17 μm,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 Xl 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 jim -17 jxm are assembled from one-dimensional nanorods with the diameter and length of 100 nm and 500 nm ~3 |xm. 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 °C.
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