Design of Comprehensive Experiment for Fluorescent Switches of Graphene Quantum Dots
JI Shuai-Jie1, GUO Li-Hua1, DAI Du-Juan1, ZHANG Lei1, GONG Pei-Wei1, LIU Zhi-Ang2, LIU Zhe1
1. School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, China;
2. The Open Sharing Service Platform of Instrument and Equipment, Qufu Normal University, Qufu 273165, China
Abstract 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.
JI Shuai-Jie, GUO Li-Hua, DAI Du-Juan, ZHANG Lei, GONG Pei-Wei, LIU Zhi-Ang, LIU Zhe. Design of Comprehensive Experiment for Fluorescent Switches of Graphene Quantum Dots[J]. Chinese Journal of Chemical Education, 2018, 39(14): 38-43.
