Boron(B)doping serves as a promising strategy to enhance the quantum yield,photostability and environmental robustness of graphene quantum dots(GQDs).In this study,we reported a light-driven strategy for the facile sy...Boron(B)doping serves as a promising strategy to enhance the quantum yield,photostability and environmental robustness of graphene quantum dots(GQDs).In this study,we reported a light-driven strategy for the facile synthesis of boron-doped graphene quantum dots(B-GQDs).Specifically,under continuous stirring at room temperature,ultraviolet irradiation induces the progressive polymerization of o-phenylenediamine(o-PDA)precursors,resulting in the formation of GQDs;meanwhile,2-hydroxyphenylboronic acid(2-HPBA),acting as the B source,participates in the polymerization reaction with o-PDA intermediates,ultimately yielding B-GQDs.This approach significantly improves the technology of preparing QDs,yielding B-GQDs with a remarkably high fluorescence quantum yield of 71.2%.Detailed investigations reveal that the abundant surface functional groups on B-GQDs facilitate hydrogen-bonding interactions with water molecules,enabling their application as fluorescent probes for the quantitative detection of water content in various organic solvents.By integrating B-GQDs,a paper-based fluorescent sensor was successfully designed,achieving ultra-portable water content detection with excellent performance(0%-100%).展开更多
基金support from Sichuan Science and Technology Project(Nos.2023ZYD0034 and 2024NSFJQ0061)the State Key Lab of Geohazard Prevention&Geoenvironment Protection Independent Research Project(No.SKLGP 2023Z009).
文摘Boron(B)doping serves as a promising strategy to enhance the quantum yield,photostability and environmental robustness of graphene quantum dots(GQDs).In this study,we reported a light-driven strategy for the facile synthesis of boron-doped graphene quantum dots(B-GQDs).Specifically,under continuous stirring at room temperature,ultraviolet irradiation induces the progressive polymerization of o-phenylenediamine(o-PDA)precursors,resulting in the formation of GQDs;meanwhile,2-hydroxyphenylboronic acid(2-HPBA),acting as the B source,participates in the polymerization reaction with o-PDA intermediates,ultimately yielding B-GQDs.This approach significantly improves the technology of preparing QDs,yielding B-GQDs with a remarkably high fluorescence quantum yield of 71.2%.Detailed investigations reveal that the abundant surface functional groups on B-GQDs facilitate hydrogen-bonding interactions with water molecules,enabling their application as fluorescent probes for the quantitative detection of water content in various organic solvents.By integrating B-GQDs,a paper-based fluorescent sensor was successfully designed,achieving ultra-portable water content detection with excellent performance(0%-100%).
