摘要
以核桃壳为碳源、氨水为添加剂,采用一步水热法制得碳点(CDs),讨论了反应温度和时间对CDs荧光性能的影响,得到实验的最佳适用条件为反应温度200℃、反应时间5h。合成的CDs平均粒径为3.0nm,发蓝光,表面含有羟基、羧基、酰胺基等含氧官能团,具有激发波长依赖的发射行为,发射光谱宽。CDs在紫外光连续照射10h表现出高的荧光稳定性,说明其可用于生物成像领域。
Carbon dots(CDs) were prepared by a one-step hydrothermal method with walnut shell as carbon source and ammonia solution as additive. The effects of reaction temperature and time on the fluorescent properties of CDs were explored in the experiment. The optimized reaction conditions were as follows: The carbon dots were synthesized at 200 ℃ for 5 h. The obtained CDs had the average diameter of 3.0 nm, emitting blue fluorescence. Their surfaces contained some functional groups such as hydroxyl groups, carboxyl groups, and amide groups. CDs also had excitation-dependent emission properties, showing broad visible light emission. CDs exhibited high fluorescence stability under ultraviolet irradiation for 10 h, indicating that they could be used in biological imaging fields.
作者
冯晓婷
张明亮
朵芳芳
FENG Xiaoting;ZHANG Mingliang;DUO Fangfang(Department of Chemistry and Chemical Engineering,Lvliang University,Lvliang 033001,China;College of Chemistry and Chemical Engineering,Xinxiang University,Xinxiang 453003,China;Institute of Energy and Fuel,Xinxiang University,Xinxiang 453003,China)
出处
《新乡学院学报》
2019年第9期17-20,32,共5页
Journal of Xinxiang University
基金
山西省青年科技研究基金项目(201801D221110)
山西省高等学校科技创新项目(2019L0950)
河南省高等学校重点科研项目(18B530002)
关键词
核桃壳
碳点
水热法
光致发光性能
walnut shell
carbon dots
hydrothermal synthesis
photoluminescence properties