The Role of N and S Doping on Photoluminescent Characteristics of Carbon Dots from Palm Bunches for Fluorimetric Sensing of Fe<sup>3+</sup> Ion
Issued Date
2022-05-01
Resource Type
ISSN
16616596
eISSN
14220067
Scopus ID
2-s2.0-85129172254
Pubmed ID
35563393
Journal Title
International Journal of Molecular Sciences
Volume
23
Issue
9
Rights Holder(s)
SCOPUS
Bibliographic Citation
International Journal of Molecular Sciences Vol.23 No.9 (2022)
Suggested Citation
Saengsrichan A., Saikate C., Silasana P., Khemthong P., Wanmolee W., Phanthasri J., Youngjan S., Posoknistakul P., Ratchahat S., Laosiripojana N., Wu K.C.W., Sakdaronnarong C. The Role of N and S Doping on Photoluminescent Characteristics of Carbon Dots from Palm Bunches for Fluorimetric Sensing of Fe<sup>3+</sup> Ion. International Journal of Molecular Sciences Vol.23 No.9 (2022). doi:10.3390/ijms23095001 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/87494
Title
The Role of N and S Doping on Photoluminescent Characteristics of Carbon Dots from Palm Bunches for Fluorimetric Sensing of Fe<sup>3+</sup> Ion
Other Contributor(s)
Abstract
This work aims to enhance the value of palm empty fruit bunches (EFBs), an abundant residue from the palm oil industry, as a precursor for the synthesis of luminescent carbon dots (CDs). The mechanism of fIuorimetric sensing using carbon dots for either enhancing or quenching photoluminescence properties when binding with analytes is useful for the detection of ultra-low amounts of analytes. This study revealed that EFB-derived CDs via hydrothermal synthesis exceptionally exhibited luminescence properties. In addition, surface modification for specific binding to a target molecule substantially augmented their PL characteristics. Among the different nitrogen and sulfur (N and S) doping agents used, including urea (U), sulfate (S), p-phenylenediamine (P), and sodium thiosulfate (TS), the results showed that PTS-CDs from the co-doping of p-phenylene-diamine and sodium thiosulfate exhibited the highest PL properties. From this study on the fluorimetric sensing of several metal ions, PTS-CDs could effectively detect Fe3+ with the highest selectivity by fluorescence quenching to 79.1% at a limit of detection (LOD) of 0.1 µmol L−1. The PL quenching of PTS-CDs was linearly correlated with the wide range of Fe3+ concentration, ranging from 5 to 400 µmol L−1 (R2 = 0.9933).