Biomass carbon dots as a sensitive “on-off fluorescent probe for Fe(Ⅲ)and promising “on off-on sensor for antioxidants
Biomass-based Carbon dots(CDs)have shown great potential in fluorescent sensing and detection of biological or chemical targets because of their photostability and biocompatibility.In this work,value-added CDs with inherent nitrogen-doping were prepared from lignin,an abundant natural biomass waste,in mild condition.Bright blue light emission with fluorescence quantum yield of up to 6.37%was observed with these CDs.We found that the photoluminescence of these CDs could be selectively and instantly quenched(on-off)by Fe(Ⅲ)with a detection limit of 0.66 μM.The quenching behavior followed a linear trend with a Ksv of 7718.7 M-1.Moreover,the quenched fluorescence could be recovered(on-off-on)by the addition of ascorbic acid to the quenching system.An interesting “on-off-on phenomenon was demonstrated,indicating a promise sensing system for instant detection of antioxidants both quantitatively and qualitatively.
Yanpeng Li Zicheng Liang Xiaohui Wang Tongqi Yuan
State Kay Laboratory of Pulp and Paper Engineering,South China University of Technology Guangzhou,51 Beijing Key Laboratory of Lignocellulosic Chemistry,Beijing Forestry University,Beijing,100083,China
国际会议
第五届制浆造纸新技术国际研讨会(ISETPP)暨第三届国际造纸与环境学术大会(IPEC)
广州
英文
1-5
2016-11-07（万方平台首次上网日期，不代表论文的发表时间）