摘要
以乙酸锌为锌源,采用溶剂热技术,在2.92、1.46、0.97、0.73、0.49℃/min 5组不同升温速率下制备了氧化锌空心微球。分别采用XRD和SEM对样品的物相结构和形貌特点进行了表征,用荧光分光光度计测试了样品的室温光致发光性能,研究了升温速率对产物形貌的影响。结果表明:随着升温速率下降,氧化锌空心微球断面的小晶粒逐渐溶解,所形成的较大晶粒延空心微球的径向连接在一起,形成光滑的纳米棒,纳米棒的末端逐渐显现出比较清晰的六棱锥状结构。微球的结晶度逐渐提高,晶粒的平均粒径呈现先减小后增大的规律,紫外发射峰发生了红移。
Hollow ZnO microspheres were prepared by solvothermal method at heating rates of 2.92℃/min,1.46℃/min,0.97℃/min,0.73℃/min and 0.49℃/min using Zn（CH3COO）2·2H20as Zn source.XRD and SEM were adopted to characterize phase structure and morphology.Photoluminescence were tested by fluorescence spectrophotometer at room temperature.The effect of heating rate on the morphology of product was investigated.The results showed that with the decline of heating rate,the crystallinity of nanocrystals gradually increased and UV emission peak occurred redshift.The average grain size decreased when the heating rate decreased from 2.92℃/min to 0.97℃/min and then increased.The morphology of microspheres have taken remarkable changes.
出处
《化工新型材料》
CAS
CSCD
北大核心
2015年第10期111-113,116,共4页
New Chemical Materials
基金
国家自然科学基金(61079010)
中国民航大学重大培育项目(3122013P001)
民航局科技创新引导资金资助项目(MHRD20140209)
关键词
氧化锌
空心微球
溶剂热法
升温速率
形貌
zinc oxide
hollow microsphere
solvothermal method
heating rate
morphology
