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Synthesis of Nitrogen-Doped Lignin/DES Carbon Quantum Dots as a Fluorescent Probe for the Detection of Fe3+ Ions

Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China
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Polymers 2018, 10(11), 1282; https://doi.org/10.3390/polym10111282
Received: 24 September 2018 / Revised: 30 October 2018 / Accepted: 15 November 2018 / Published: 17 November 2018
(This article belongs to the Special Issue Lignin Polymers: Structures, Reactions and Applications)
Carbon quantum dots (CQDs) as a rising star of carbon nanomaterials have extensive applications due to their excellent characteristics. In this work, we introduce a simple and green method to prepare nitrogen-doped lignin carbon quantum dots (N-L-CQDs) by using alkali lignin carbon sources and deep eutectic solvent (DES) as solution and nitrogen source. The physiochemical characterization results suggested that N-L-CQDs with diameters ranging from 4 to 12 nm were successfully synthesized. The optical properties data indicated that the as-prepared N-L-CQDs with a quantum yield of 7.95% exhibited excellent optoelectronic properties, excitation-dependent and pH stability. After that, we have investigated the N-L-CQDs used as fluorescent probes to detect iron ions, which suggested that the as-prepared N-L-CQDs exhibited excellent sensitivity and selectivity for Fe3+ with a detection limit of 0.44 μM. Besides, cytotoxicity of N-L-CQDs was also evaluated by MTT assay. These results demonstrated that the as-prepared N-L-CQDs with excellent properties have potential applications in environment and biomedicine. View Full-Text
Keywords: carbon quantum dots; lignin; deep eutectic solvent; fluorescent; iron ions carbon quantum dots; lignin; deep eutectic solvent; fluorescent; iron ions
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MDPI and ACS Style

Jiang, X.; Shi, Y.; Liu, X.; Wang, M.; Song, P.; Xu, F.; Zhang, X. Synthesis of Nitrogen-Doped Lignin/DES Carbon Quantum Dots as a Fluorescent Probe for the Detection of Fe3+ Ions. Polymers 2018, 10, 1282. https://doi.org/10.3390/polym10111282

AMA Style

Jiang X, Shi Y, Liu X, Wang M, Song P, Xu F, Zhang X. Synthesis of Nitrogen-Doped Lignin/DES Carbon Quantum Dots as a Fluorescent Probe for the Detection of Fe3+ Ions. Polymers. 2018; 10(11):1282. https://doi.org/10.3390/polym10111282

Chicago/Turabian Style

Jiang, Xueqin, Yixin Shi, Xin Liu, Meng Wang, Pingping Song, Feng Xu, and Xueming Zhang. 2018. "Synthesis of Nitrogen-Doped Lignin/DES Carbon Quantum Dots as a Fluorescent Probe for the Detection of Fe3+ Ions" Polymers 10, no. 11: 1282. https://doi.org/10.3390/polym10111282

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