The electrochemiluminescence(ECL)properties of many carbon materials have been reported with glassy carbon(GC),Pt,Au or indium tin oxide(ITO)as the working electrode(WE).As one type of carbon materials,GC itself can g...The electrochemiluminescence(ECL)properties of many carbon materials have been reported with glassy carbon(GC),Pt,Au or indium tin oxide(ITO)as the working electrode(WE).As one type of carbon materials,GC itself can generate ECL signal.Some research groups have already noticed the ECL signal from GC WE and reported the results of GC WE with respect to their luminophores.However,comprehensive analyses of ECL properties of GC WE are rare.Herein,the ECL properties of GC WE in organic electrolyte with benzoyl peroxide as the coreactant are reported.Our results are of great importance to distinguish the true ECL data of luminophores from that of GC.展开更多
Nitrogen-doped carbon quantum dots(N-CQDs)are nanocomposites that can be synthesized by the hydrothermal method.In this work,N-CQDs with the size of 3.2±1.7 nm was prepared from 1 g citric acid and 2 g urea precu...Nitrogen-doped carbon quantum dots(N-CQDs)are nanocomposites that can be synthesized by the hydrothermal method.In this work,N-CQDs with the size of 3.2±1.7 nm was prepared from 1 g citric acid and 2 g urea precursor in 10 mL water.Electrochemiluminescence(ECL)of the prepared N-CQDs with K2S2O8 as a coreactant was found to reach a high ECL efficiency up to 109%relative to that of the Ru(bpy)_(3)^(2+)/K_(2)S_(2)O_(8),coreactant system,revealing their great potential for electroanalysis.It is probably because that N elements were doped well in this N-CQDs and increased presence of surface states per mass of N-CQDs.From the spooling ECL spectroscopy,it can be found that the ECL spectra exhibited both a red shift compared with their photoluminescence(PL)spectrum and a wavelength shift during the potentiodynamic scan in the ECL evolution and devolution processes,due to various emissive excited states of N-CQDs leading to higher ECL efficiency.This work gives an insight into development of high ECL efficiency N-CQDs for bioanalytical and light emitting applications.展开更多
基金Thanks for the financial supports from the Natural Sciences and Engineering Research Council of Canada of Canada(NSERC,DG RGPIN-2013-201697(Z.D.)RGPIN-2018-06556(Z.D.))+6 种基金Canada Foundation of Innovation/Ontario Innovation Trust(CFI/OIT,9040(Z.D.))Premier's Research Excellence Award(PREA,2003(Z.D.))Canada Institute of Photonics Innovation(2005(Z.D.))Ontario Photonics Consortium(2002 Z.D.)National Natural Science Foundation of China(22004034(X.Q.))Natural Science Foundation of Hunan Province(China)(2020JJ5226(X.Q.))China Scholarship Council(CSC,201908430010(X.Q.)).
基金support from Natural Sciences and Engineering Research Council Canada(NSERC,DG RGPIN-2013-201697,DG RGPIN-2018-06556 and SPG STPGP-2016-493924)Canada Foundation of Innovation,Ontario Innovation Trust(CFI/OIT,9040)+1 种基金Premier’s Research Excellence Award(PREA,2003)Western University.
文摘The electrochemiluminescence(ECL)properties of many carbon materials have been reported with glassy carbon(GC),Pt,Au or indium tin oxide(ITO)as the working electrode(WE).As one type of carbon materials,GC itself can generate ECL signal.Some research groups have already noticed the ECL signal from GC WE and reported the results of GC WE with respect to their luminophores.However,comprehensive analyses of ECL properties of GC WE are rare.Herein,the ECL properties of GC WE in organic electrolyte with benzoyl peroxide as the coreactant are reported.Our results are of great importance to distinguish the true ECL data of luminophores from that of GC.
基金funded by the Natural Sciences and Engineering Research Council of Canada(NSERC,DG RGPIN-2013-201697,DG RGPIN-2018-06556,DG RGPIN-2023-05337,SPG STPGP-2016-493924(Z.D.))New Frontiers in Research Fund,NFRFR-2021-00272(Z.D.)+2 种基金National Natural Science Foundation of China(22004034(X.Q.))Natural Science Foundation of Hunan Province(China)(2020JJ5226(X.Q.))China Scholarship Council(CSC,201908430010(X.Q.)).
文摘Nitrogen-doped carbon quantum dots(N-CQDs)are nanocomposites that can be synthesized by the hydrothermal method.In this work,N-CQDs with the size of 3.2±1.7 nm was prepared from 1 g citric acid and 2 g urea precursor in 10 mL water.Electrochemiluminescence(ECL)of the prepared N-CQDs with K2S2O8 as a coreactant was found to reach a high ECL efficiency up to 109%relative to that of the Ru(bpy)_(3)^(2+)/K_(2)S_(2)O_(8),coreactant system,revealing their great potential for electroanalysis.It is probably because that N elements were doped well in this N-CQDs and increased presence of surface states per mass of N-CQDs.From the spooling ECL spectroscopy,it can be found that the ECL spectra exhibited both a red shift compared with their photoluminescence(PL)spectrum and a wavelength shift during the potentiodynamic scan in the ECL evolution and devolution processes,due to various emissive excited states of N-CQDs leading to higher ECL efficiency.This work gives an insight into development of high ECL efficiency N-CQDs for bioanalytical and light emitting applications.
