What is it about?
Heteroatom-doped carbon dots have gained intensive interest in fluorescence-based bioimaging and metal-ion sensing applications, due to their approach being simple, safe, eco-friendly, with good biocompatibility, and high fluorescence stability, especially when derived from greener renewable plant materials. This study reports the green synthesis of nitrogen-doped carbon dots (NCDs) using Prosopis juliflora plant stems under hydrothermal conditions. The as-synthesized NCDs were carefully studied to understand their structural, optical, and morphological properties. The NCDs displayed blue emission under 365 nm with excellent stability and high water solubility. The fluorescent quantum yield was found to be ∼ 4.92 %. The HRTEM images revealed spherical particles with an average particle size of ∼ 8.6 nm. The synthesized NCDs were studied for sensing Fe(III) ions exhibited high sensitivity, excellent selectivity for Fe3+ ions, and a limit of detection (LOD) of 0.593 μM with a linear range of 20 – 200 µM. Apart from sensing ferric ions, the synthesized NCDs can also be used to determine the pH of the sample. The NCDs showed a pH-dependent fluorescent emission producing linearity from pH 2 to 9. Furthermore, Fe3+ ion sensing was conducted using real samples, including groundwater and lake water. This work demonstrates the green synthesis of NCDs as an eco-friendly material for efficient sensing of Fe3+ ions.
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Why is it important?
Heteroatom-doped carbon dots have gained intensive interest in fluorescence-based bioimaging and metal-ion sensing applications, due to their approach being simple, safe, eco-friendly, with good biocompatibility, and high fluorescence stability, especially when derived from greener renewable plant materials. This study reports the green synthesis of nitrogen-doped carbon dots (NCDs) using Prosopis juliflora plant stems under hydrothermal conditions. The as-synthesized NCDs were carefully studied to understand their structural, optical, and morphological properties. The NCDs displayed blue emission under 365 nm with excellent stability and high water solubility. The fluorescent quantum yield was found to be ∼ 4.92 %. The HRTEM images revealed spherical particles with an average particle size of ∼ 8.6 nm. The synthesized NCDs were studied for sensing Fe(III) ions exhibited high sensitivity, excellent selectivity for Fe3+ ions, and a limit of detection (LOD) of 0.593 μM with a linear range of 20 – 200 µM. Apart from sensing ferric ions, the synthesized NCDs can also be used to determine the pH of the sample. The NCDs showed a pH-dependent fluorescent emission producing linearity from pH 2 to 9. Furthermore, Fe3+ ion sensing was conducted using real samples, including groundwater and lake water. This work demonstrates the green synthesis of NCDs as an eco-friendly material for efficient sensing of Fe3+ ions.
Perspectives
Heteroatom-doped carbon dots have gained intensive interest in fluorescence-based bioimaging and metal-ion sensing applications, due to their approach being simple, safe, eco-friendly, with good biocompatibility, and high fluorescence stability, especially when derived from greener renewable plant materials. This study reports the green synthesis of nitrogen-doped carbon dots (NCDs) using Prosopis juliflora plant stems under hydrothermal conditions. The as-synthesized NCDs were carefully studied to understand their structural, optical, and morphological properties. The NCDs displayed blue emission under 365 nm with excellent stability and high water solubility. The fluorescent quantum yield was found to be ∼ 4.92 %. The HRTEM images revealed spherical particles with an average particle size of ∼ 8.6 nm. The synthesized NCDs were studied for sensing Fe(III) ions exhibited high sensitivity, excellent selectivity for Fe3+ ions, and a limit of detection (LOD) of 0.593 μM with a linear range of 20 – 200 µM. Apart from sensing ferric ions, the synthesized NCDs can also be used to determine the pH of the sample. The NCDs showed a pH-dependent fluorescent emission producing linearity from pH 2 to 9. Furthermore, Fe3+ ion sensing was conducted using real samples, including groundwater and lake water. This work demonstrates the green synthesis of NCDs as an eco-friendly material for efficient sensing of Fe3+ ions.
Professor Mohammad Mansoob Khan
Universiti Brunei Darussalam
Read the Original
This page is a summary of: Biomass derived nitrogen-doped water soluble carbon dots from Prosopis juliflora for Fe3+ sensing, Microchemical Journal, May 2025, Elsevier,
DOI: 10.1016/j.microc.2025.113286.
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Biomass derived nitrogen-doped water soluble carbon dots from Prosopis juliflora for Fe3+ sensing
Heteroatom-doped carbon dots have gained intensive interest in fluorescence-based bioimaging and metal-ion sensing applications, due to their approach being simple, safe, eco-friendly, with good biocompatibility, and high fluorescence stability, especially when derived from greener renewable plant materials. This study reports the green synthesis of nitrogen-doped carbon dots (NCDs) using Prosopis juliflora plant stems under hydrothermal conditions. The as-synthesized NCDs were carefully studied to understand their structural, optical, and morphological properties. The NCDs displayed blue emission under 365 nm with excellent stability and high water solubility. The fluorescent quantum yield was found to be ∼ 4.92 %. The HRTEM images revealed spherical particles with an average particle size of ∼ 8.6 nm. The synthesized NCDs were studied for sensing Fe(III) ions exhibited high sensitivity, excellent selectivity for Fe3+ ions, and a limit of detection (LOD) of 0.593 μM with a linear range of 20 – 200 µM. Apart from sensing ferric ions, the synthesized NCDs can also be used to determine the pH of the sample. The NCDs showed a pH-dependent fluorescent emission producing linearity from pH 2 to 9. Furthermore, Fe3+ ion sensing was conducted using real samples, including groundwater and lake water. This work demonstrates the green synthesis of NCDs as an eco-friendly material for efficient sensing of Fe3+ ions.
Biomass derived nitrogen-doped water soluble carbon dots from Prosopis juliflora for Fe3+ sensing
Heteroatom-doped carbon dots have gained intensive interest in fluorescence-based bioimaging and metal-ion sensing applications, due to their approach being simple, safe, eco-friendly, with good biocompatibility, and high fluorescence stability, especially when derived from greener renewable plant materials. This study reports the green synthesis of nitrogen-doped carbon dots (NCDs) using Prosopis juliflora plant stems under hydrothermal conditions. The as-synthesized NCDs were carefully studied to understand their structural, optical, and morphological properties. The NCDs displayed blue emission under 365 nm with excellent stability and high water solubility. The fluorescent quantum yield was found to be ∼ 4.92 %. The HRTEM images revealed spherical particles with an average particle size of ∼ 8.6 nm. The synthesized NCDs were studied for sensing Fe(III) ions exhibited high sensitivity, excellent selectivity for Fe3+ ions, and a limit of detection (LOD) of 0.593 μM with a linear range of 20 – 200 µM. Apart from sensing ferric ions, the synthesized NCDs can also be used to determine the pH of the sample. The NCDs showed a pH-dependent fluorescent emission producing linearity from pH 2 to 9. Furthermore, Fe3+ ion sensing was conducted using real samples, including groundwater and lake water. This work demonstrates the green synthesis of NCDs as an eco-friendly material for efficient sensing of Fe3+ ions.
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