The Role of N and S Doping on Photoluminescent Characteristics of Carbon Dots from Palm Bunches for Fluorimetric Sensing of Fe3+ Ion

International Journal of Molecular Sciences

卷:23

Sakhon Ratchahat¹  Aphinan Saengsrichan¹  Chaiwat Saikate¹  Chularat Sakdaronnarong¹  Pattaraporn Posoknistakul¹  Peeranut Silasana¹  Kevin C.-W. Wu²  Wanwitoo Wanmolee³  Saran Youngjan³  Pongtanawat Khemthong³  Jakkapop Phanthasri³  Navadol Laosiripojana⁴ 

[1] Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Putthamonthon 4 Road, Salaya, Putthamonthon, Nakhon Pathom 73170, Thailand;

[2] Department of Chemical Engineering, National Taiwan University, No.1, Sec.4 Roosevelt Road, Taipei 10617, Taiwan;

[3] National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand;

[4] The Joint Graduate School of Energy and Environment, King Mongkut’s University of Technology Thonburi, 126 Pracha Uthit Road, Bang Mot, Thung Khru, Bangkok 10140, Thailand;

关键词: carbon dots;    hydrothermal;    biomass;    surface passivation;    nitrogen and sulfur doping;    photoluminescence;   

DOI  :  10.3390/ijms23095001

来源: DOAJ

【 摘 要 】

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-phenylenediamine 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).

【 授权许可】

Unknown