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photo-induced ag modulating carbon dots:Greatly improved fluorescent properties and derived sensing application

Chinese Chemical Letters 2024年第1期35卷 338-342页

作者： Yuwei Wang Ye Li Guixiang Yang Xiaofeng Yang Chenglu Yan Huaqiao Peng Huiyong Wang Juan Du Baozhan Zheng Yong Guo Department of Chemistry Sichuan UniversityChengdu 610064China Institute of Quality Standard and Testing Technology for agro-products Sichuan Academy of Agricultural SciencesChengdu 610066China Key Laboratory of Aviation Fuel&Chemical Airworthiness and Green Development The Second Research Institute of Civil Aviation Administration of ChinaChengdu 610041China School of Chemistry and Chemical Engineering Henan Normal UniversityXinxiang 453007China

Carbon dots(CDs)have been attracted much attention and widely studied due to their excellent fluorescence(FL)properties,better biocompatibility and outstanding photo/chemical ***,the disadvantage of lower quantum yield(QY)still limits its wide ***,we reported a novel and convenient strategy to prepare photo-induced ag/CDs(p-ag/CDs)by irradiating the mixed ag+and hydrophobic CDs(h-CDs)acetone solution with ultraviolet(UV)*** obtained p-ag/CDs exhibit a greatly enhanced FL emission together with a blue shift(460 nm)than h-CDs(520 nm).The QY of p-ag/CDs is measured to be 51.1%,which is 10.4 times higher than that of h-CDs(4.9%),indicating that photo-induced ag modulation can effectively improve the optical properties of *** mechanisms for the FL enhancement and blue shift of h-CDs are studied in *** results prove that the greatly enhanced FL emission is from the generated ag nanoparticles(agNPs)by UV light irradiation based on metal-enhanced fluorescence(MEF),and the increased oxygen-contained groups in this process lead to the blue shift in CDs ***,the p-ag/CDs exhibit higher sensitivity and selectivity for sulfide ions(S2-)detection than that of h-CDs,which have a lower response to S2-.This work not only offers a novel strategy to improve the FL properties of materials but also endows them with new functions and broadens their application fields.

关键词： Carbon dots photo-induced ag modulating Fluorescent enhancement High quantum yield Derived sensing application Sulfide determination

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