高热稳定性碳点及其荧光薄膜的制备  

Preparation of Carbon Dots with High Thermal Stability and Their Fluorescent Films

作　　者：肖斌 刘兴华 郑静霞 何品一 杨永珍[1] XIAO Bin;LIU Xinghua;ZHENG Jingxia;HE Pinyi;YANG Yongzhen(Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China)

机构地区：[1]太原理工大学新材料界面科学与工程教育部重点实验室,太原030024

出　　处：《太原理工大学学报》2021年第5期702-711,共10页Journal of Taiyuan University of Technology

基　　金：国家自然科学基金资助项目(51972221);山西省回国留学人员科研资助项目(2020-051,HGKY2019027)。

摘　　要：碳点(CDs)具有优异的荧光性能、良好的化学稳定性、易于功能化等优点,作为荧光材料已用于固态照明领域。然而,大部分CDs的热稳定性欠佳,限制了其在激光照明中的广泛应用。为了获得热稳定性高且成本低的CDs,以柠檬酸和2,7-二羟基萘为反应原料,采用一步水热法并调控反应物浓度,得到荧光量子产率为49%的Y-CDs;对其进行退火处理,退火后的YG-CDs在250℃时仅失重10%,热稳定性得到较大提升。将YG-CDs与三种不同的成膜剂(聚甲基丙烯酸甲酯、聚乙烯醇和硅烷偶联剂)进行复合得到荧光薄膜,三种薄膜均表现出良好的透过率、荧光性能和热稳定性。本研究为推动CDs在激光照明领域中的应用提供了理论和实践基础。Carbon dots(CDs)have been applied to solid lighting because of their excellent fluorescent properties,good chemical stability,easy functionalization,and other advantages.However,the low thermal stability of most CDs limits the wide application of CDs as phosphors in laser illumination field.Aiming at CDs with high thermal stability and low cost,Y-CDs with fluorescent quantum yield of 49%were prepared by one-step hydrothermal method using citric acid and 2,7-dihydroxynaphthalene as raw materials and adjusting the concentration of reactants.The YG-CDs after annealing only lost 10%of weight at 250℃,while their thermal stability was greatly improved.The fluorescent films with good transmittance,fluorescent property,and thermal stability were obtained by combining the annealed YG-CDs with three film-forming agents(polymethyl methacrylate,polyvinyl alcohol,and silane coupling agent).This research provides a theoretical and practical basis for the application of CDs-based fluorescent films for laser illumination.

关 键 词：碳点 退火 热稳定性 荧光薄膜 激光照明 

分 类 号：TB383.2[一般工业技术—材料科学与工程]