摘要
以葡萄糖为碳源,以聚乙二醇(PEG)为分散剂和表面修饰剂,采用微波法和水热法2种加热方法,探索了水溶性荧光纳米碳量子点(Carbon Quantum Dots,CQDs)的制备;探讨了碳量子点制备过程中反应温度、反应时间、PEG/葡萄糖摩尔比和p H值对碳量子点荧光性能的影响.实验结果表明,微波法合成碳量子点的影响因素的排列顺序为:反应时间>反应物摩尔比>反应温度,反应时间为2.5 min、摩尔比n(PEG-200):n(葡萄糖)=6∶1、反应温度为180℃,p H=9为微波法合成荧光碳量子点的最优条件,并在此优化条件下,对微波法和水热法制备的碳量子点的光学性质进行了初步比较,结果显示,水热法制备的荧光碳量子点性能略优于微波法,这2种方法制备的荧光碳量子点都具有较好的荧光性能,均能用于荧光标记领域.
The water -soluble fluorescent carbon quantum dots （CQDs）with glucose as a carbon source and polyethylene glycol （PEG）as dispersant and surface modifier,were synthesized in aqueous medium by microwave irradiation and hydrothermal methods respectively in order to explore the preparation of CQDs.The effect of reaction temperature,time,PEG/glucose molar ratios and pH value on the fluorescence properties of CQDs were discussed by using orthogonal experiment method.The results suggest the influence factors from main to secondary are the reaction time,reactant mole ratio and reaction temperature.The reaction temperature 180 ℃,reaction time 2.5 min,PEG -200 /glucose molar ratio 6 ∶1 and pH =9 are the optimal condition of microwave synthesis of CQDs.And under the resulting optimized conditions,the optical properties of CQDs obtained by the hydrothermal and microwave irradiation two methods are compared preliminary.The results show that the performance of carbon quantum dots prepared by hydrothermal method is superior to that of microwave method.But the two preparation methods of fluorescent CQDs have both good fluorescence properties.They can be used in the field of fluorescent labeling.
出处
《湖南科技大学学报（自然科学版）》
CAS
北大核心
2015年第2期104-109,共6页
Journal of Hunan University of Science And Technology：Natural Science Edition
基金
湖北省教育厅科学技术研究基金(Q20131105)
武汉科技大学煤转化与新型炭材料湖北省重点实验室基金(WKDM201301)
武汉科技大学预研基金(2014XG006)
武汉科技大学大学生科技创新基金(13ZRC041)
关键词
荧光
碳量子点
制备
优化条件
光学性能
fluorescence
CQDs
preparation
optimal conditions
optical properties
