摘要
以柠檬酸为原料通过脱水缩合的方法合成荧光石墨烯量子点,结合透射电镜、红外及荧光光谱仪对其结构、组成及性能进行表征,并利用过渡金属离子与石墨烯量子点之间的电子转移作用、乙二胺四乙酸与金属离子之间的络合作用使其发生荧光淬灭与恢复,实现石墨烯量子点荧光“关”与“开”的设计,并总结出过渡金属离子电子结构与荧光开关之间的作用规律。将实验教学与前沿研究紧密结合,涵盖了材料合成、表征和性能研究等3方面的内容,内容丰富、综合性强,有利于培养学生的科研素养与实验技能,并提高其分析问题、解决问题的能力。
Fluorescent graphene quantum dots （GQDs） were synthesized from citric acid by a simple dehydration-condensation process, and the structure, chemical composition and property were studied by transmission electron microscopy, infrared spectroscopy and fluorescence spectrophotometer. A series of fluorescent switches of GQDs were also designed by using the electron-transfer interaction between photoluminescent GQDs and transition metal ions as well as the chelation interaction between metal ions and ethylene diamine tetraacetic acid. Moreover, the mechanism and interaction law for the fluorescence quenching and recovering of GQDs were also carefully studied. This design experiment combined scientific research focus and experiment teaching, and covered the design, synthesis, characterization and property study of materials, all of which were helpful to cultivate students＇ scientific literacy and experimental skills as well as to improve their ability to analyze and solve problems.
作者
吉帅洁
郭丽华
戴杜娟
张蕾
公培伟
刘志昂
刘哲
JI Shuai-Jie;GUO Li-Hua;DAI Du-Juan;ZHANG Lei;GONG Pei-Wei;LIU Zhi-Ang;LIU Zhe(School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165. China;The Open Sharing Service Platform of Instrument and Equipment, Qufu Normal University, Qufu 273165, China)
出处
《化学教育（中英文）》
CAS
北大核心
2018年第14期38-43,共6页
Chinese Journal of Chemical Education
基金
2016年国家大学生创新创业训练计划项目(201610446027)
曲阜师范大学实验技术研究项目(sj201505)
关键词
石墨烯量子点
荧光开关
过渡金属离子
综合实验
graphene quantum dots
fluorescent switches
transition metal ions
comprehenslve experiment
