Green preparation of carbon dots with papaya as carbon source for effective fluorescent sensing of Iron (III) and Escherichia coli.
A simple one-step hydrothermal green approach was reported for the preparation of carbon dots (CDs) without any further decoration or modification with papaya powder as natural carbon source. In this economical and eco-friendly system, deionized water or 90% ethanol was used as solvent to produce water-soluble or ethanol-soluble CDs, respectively, termed as W-CDs and E-CDs. The quantum yield (QY) for W-CDs was 18.98%, while that for E-CDs was 18.39%. The potentials of the prepared carbon dots toward diverse applications were thoroughly investigated. W-CDs and E-CDs provide promising probes for fluorescence detection of Fe(3+), offering limits of detection of 0.48μmolL(-1) and 0.29μmolL(-1), respectively. W-CDs was further demonstrated to be a promising probe for fluorescence sensing of Escherichia coli O157: H7, along with a limit of detection of 9.5×10(4)cfumL(-1). Meanwhile, both W-CDs and E-CDs exhibit favorable biocompatibility, and demonstrated to be efficient for Hela cell imaging.
['Wang|Ning|N|', 'Wang|Yiting|Y|', 'Guo|Tingting|T|', 'Yang|Ting|T|', 'Chen|Mingli|M|', 'Wang|Jianhua|J|']
D015374:Biosensing Techniques D029441:Carica D004926:Escherichia coli D004927:Escherichia coli Infections D005456:Fluorescent Dyes D055772:Green Chemistry Technology D006367:HeLa Cells D006801:Humans D007501:Iron D061848:Optical Imaging D045663:Quantum Dots D012995:Solubility D013050:Spectrometry, Fluorescence D014867:Water
Green preparation Carbon dots Iron Cell imaging E. coli sensor Florescence