We demonstrated a facile method to prepare photoluminescent graphene quantum dots using commercial polyacrylonitrile（PAN） based carbon fibers（CFs） as the raw material by facile chemical oxidation and exfoliation m...We demonstrated a facile method to prepare photoluminescent graphene quantum dots using commercial polyacrylonitrile（PAN） based carbon fibers（CFs） as the raw material by facile chemical oxidation and exfoliation method. The as-prepared GQDs with uniform size exhibit an excitation-independent photoluminescence behavior, which is similar to other semiconductor quantum dots. Moreover, when acting as catalyst the uniform GQDs have better activity for electrochemical oxidation of dopamine（DA） than graphene oxides（GOs）. The square wave voltammogram（SWV） peak values of GQDs are in good correspondence with DA concentrations and can act as a sensor of DA.展开更多
基金Funded by the National Natural Science Foundation of China(21676070)the Hebei Training Program for Talent Project(A2015007)+1 种基金the Beijing National Laboratory for Molecular Sciences(20140120)the Special Project for Synthesis and Application of Graphene in Hebei University of Science and Technology(2015PT65)
文摘We demonstrated a facile method to prepare photoluminescent graphene quantum dots using commercial polyacrylonitrile（PAN） based carbon fibers（CFs） as the raw material by facile chemical oxidation and exfoliation method. The as-prepared GQDs with uniform size exhibit an excitation-independent photoluminescence behavior, which is similar to other semiconductor quantum dots. Moreover, when acting as catalyst the uniform GQDs have better activity for electrochemical oxidation of dopamine（DA） than graphene oxides（GOs）. The square wave voltammogram（SWV） peak values of GQDs are in good correspondence with DA concentrations and can act as a sensor of DA.
