The carbon dots(CDs)could be applied in advanced field by using their sensitivity of the optical phenomenon.In this paper,the CDs in an average size of 3.75 nm was synthesized from coal by one-step solvothermal method...The carbon dots(CDs)could be applied in advanced field by using their sensitivity of the optical phenomenon.In this paper,the CDs in an average size of 3.75 nm was synthesized from coal by one-step solvothermal method,in which ethylenediamine was a reaction solvent and a nitrogen-containing precursor in the system.A blue-green fluorescence appeared under ultraviolet light.The strongest fluorescence emission was recorded at 480 nm under the excitation wavelength of 400 nm.The coal-based CDs could specifically recognize Fe^(3+)and the detection limit was 0.103μM.The coal-based CDs/TiO_(2) composite displayed an improved photoelectric response in 4 times comparing that of the TiO_(2) under the ultraviolet light with intensity of 10 mW cm_(-2).The photocatalytic activity over the degradation of organic molecules was accelerated as well.展开更多
基金supported by the Foundation of State Key Laboratory of High efficiency Utilization of Coal and Green Chemical Engineering,Ning Xia University(2020-KF-22)Special project of Science and Technology Department,Xinjiang Uygur Autonomous Region(2020D03025)the Natural Science Foundation of Xinjiang Uygur Autonomous Region(2021D01A03).
文摘The carbon dots(CDs)could be applied in advanced field by using their sensitivity of the optical phenomenon.In this paper,the CDs in an average size of 3.75 nm was synthesized from coal by one-step solvothermal method,in which ethylenediamine was a reaction solvent and a nitrogen-containing precursor in the system.A blue-green fluorescence appeared under ultraviolet light.The strongest fluorescence emission was recorded at 480 nm under the excitation wavelength of 400 nm.The coal-based CDs could specifically recognize Fe^(3+)and the detection limit was 0.103μM.The coal-based CDs/TiO_(2) composite displayed an improved photoelectric response in 4 times comparing that of the TiO_(2) under the ultraviolet light with intensity of 10 mW cm_(-2).The photocatalytic activity over the degradation of organic molecules was accelerated as well.
