摘要
以ZnCl2和NH3.H2O为原料,采用微波辅助液相合成方法制备花状ZnO微晶。利用X线衍射仪、扫描电子显微镜、透射电子显微镜、高分辨电子显微镜和荧光分光光度计对样品的微观结构和性能进行表征与分析。研究不同试验条件(NH3.H2O的体积、反应功率和反应时间)对产物形貌与尺寸的影响,并讨论花状ZnO微晶可能的形成机理。研究结果表明:在ZnCl2溶液中滴加1.5 mL NH3.H2O,在微波功率为240 W加热20 min的条件下,可以合成花状ZnO微晶。ZnO微晶的花状结构可能是通过成核-晶体生长2步形成。花状ZnO微晶具有独特的荧光性能。
Flower-like ZnO microcrystals were prepared using ZnC12 and NH3-H20 as materials by a facile microwave-assisted solution-based route. Phase structure, morphology and properties of products were investigated in detail by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, high-resolution transmission electron microscope （HRTEM） and photoluminescence （PL） spectra. The influence of reaction conditions such as volume of NH3＂H2O, microwave power and reaction time on morphologies and sizes of final products was studied. The possible nucleation-crystal growth formation mechanism of flower-like ZnO microcrystals was proposed based on the experimental results. The results show that flower-like ZnO microcrystals are obtained extensively with 1.5 mL NH3＇H20 and microwave power of 240 W for 20 min simultaneously. Flower-like ZnO microcrystals possess unique fluorescent properties.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第1期67-72,共6页
Journal of Central South University:Science and Technology
基金
中央高校科研业务费前瞻布局研究重点项目(2010ZQQD008)
关键词
ZNO
花状
微波合成
荧光性能
ZnO
flower-like
microwave synthesis
luminescence
