新型炭材料2021，Vol.36Issue(3)：625-631,7.DOI:10.1016/S1872-5805(21)60031-8
碳量子点:不同发光行为原因分析及其性能
Carbon quantum dots: Synthesis and correlation of luminescence behavior with microstructure
摘要
Abstract
Two kinds of carbon quantum dots, C-dots-160 and C-dots-200 with different fluorescence luminescence behaviors were synthesized by a one-step hydrothermal method at 160 and 200 °C, respectively, using ammonium citrate as the raw material. The relationship between the microstructure of the C-dots and the fluorescence emission behavior was investigated. Results indicate that an increase of synthesis temperature introduces more oxygen and nitrogen atoms into the C-dots, increasing the total number of structural defects and altering their concentation ratio . It is this ratio difference in the two C-dots that causes their different lumines-cence behaviors. The proportion of several types of defects in the C-dots-200 are relatively balanced, leading to excitation wavelength-dependent fluorescence while the most abundant defects in C-dots-160 are in the form of C=O, which is the main reas-on for its excitation independent luminescence behavior. The number of structural defects in C-dots-160 is less than in C-dots-200 and the latter has the stronger fluorescence emission.关键词
碳量子点/结构缺陷/激发波长独立性荧光/激发波长依赖性荧光Key words
Carbon quantum dots/Structural defects/Excitation-independent fluorescence/Excitation-dependent fluorescence分类
化学化工引用本文复制引用
方黎洋,郑经堂..碳量子点:不同发光行为原因分析及其性能[J].新型炭材料,2021,36(3):625-631,7.基金项目
This work is financially supported by the Sci-ence Development Plan Project of Weifang City,Shandong Province,China(No.2018GX106). 山东潍坊市科学技术发展计划项目(2018GX106). （No.2018GX106）
