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...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。展开更多
The gas chromatography-mass spectrometry-data system(GC-MS-DS) is used to study the changes of major chemical components and to discuss the reaction mechanism during catalytic isomerization of turpentine over Pd/C.At ...The gas chromatography-mass spectrometry-data system(GC-MS-DS) is used to study the changes of major chemical components and to discuss the reaction mechanism during catalytic isomerization of turpentine over Pd/C.At 250 ℃,when the quantity of catalyst is 0.05% turpentine weight,we study the catalytic isomerization of turpentine to prepare high-strength limonene.The contents of pinene and limonene are respectively 8.36% and 57.67% at reaction time of 120 min,while camphene is just 2.72% of the oil.The tracking analysis indicats that the reaction rate of pinene isomerizing to monocyelic monoterpene is faster than that to acyclic monoterpene,and pinene isomerized to limonene is the main reaction,whose speed is greater than that of camphene.Meanwhile,we find that the content of sesquiterpene is not changed on the whole.展开更多
文摘以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。
文摘The gas chromatography-mass spectrometry-data system(GC-MS-DS) is used to study the changes of major chemical components and to discuss the reaction mechanism during catalytic isomerization of turpentine over Pd/C.At 250 ℃,when the quantity of catalyst is 0.05% turpentine weight,we study the catalytic isomerization of turpentine to prepare high-strength limonene.The contents of pinene and limonene are respectively 8.36% and 57.67% at reaction time of 120 min,while camphene is just 2.72% of the oil.The tracking analysis indicats that the reaction rate of pinene isomerizing to monocyelic monoterpene is faster than that to acyclic monoterpene,and pinene isomerized to limonene is the main reaction,whose speed is greater than that of camphene.Meanwhile,we find that the content of sesquiterpene is not changed on the whole.
