Hydrothermal synthesis of nitrogen-doped carbon quantum dots from microcrystalline cellulose for the detection of Fe3+ ions in an acidic environment

Peng Wu; Wei Li; Qiong Wu; Yushan Liu; Shouxin Liu

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Hydrothermal synthesis of nitrogen-doped carbon quantum dots from microcrystalline cellulose for the detection of Fe3+ ions in an acidic environment

机译：从微晶纤维素水热合成氮掺杂碳量子点，用于在酸性环境中检测Fe 3 + 离子

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Nitrogen-doped carbon quantum dots (NCQDs) have been synthesized by the hydrothermal method with microcrystalline cellulose as carbon source and ethylenediamine as nitrogen dopant. The synthesized NCQDs were characterized by FT-IR, TEM, XPS, UV-vis, XRD and fluorescence emission spectroscopy. It was found that nitrogen species were efficiently doped into the carbon framework of the CQDs. The obtained NCQDs were spherical particles with an average diameter of 3.2 nm. Furthermore, the NCQDs showed better fluorescence emission properties and higher quantum yield in acidic solution than CQDs. When used as a fluorescent probe for Fe3+ detection via fluorescent quenching, high selectivity and sensitivity were achieved, and the limit of detection of Fe3+ was as low as 0.21 nM in the acidic environment. The quenching process of NCQDs by Fe3+ was proved to be a dynamic quenching by using fluorescence decay times analysis.

机译：以微晶纤维素为碳源，乙二胺为氮掺杂剂，通过水热法合成了氮掺杂碳量子点（NCQDs）。通过FT-IR，TEM，XPS，UV-vis，XRD和荧光发射光谱对合成的NCQD进行表征。发现氮物种被有效地掺杂到CQD的碳骨架中。获得的NCQD是平均直径为3.2nm的球形颗粒。此外，NCQD在酸性溶液中显示出比CQD更好的荧光发射特性和更高的量子产率。当通过荧光猝灭作为Fe 3 + 检测方法的荧光探针时，具有很高的选择性和灵敏度，并且对Fe的检测限在酸性环境中， 3 + 低至0.21 nM。 Fe 3 + 对NCQDs的猝灭过程通过荧光衰减时间分析证明是动态猝灭。 展开▼

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《RSC Advances》 |2017年第70期|共10页

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Peng Wu; Wei Li; Qiong Wu; Yushan Liu; Shouxin Liu;
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中图分类化学;

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1. Hydrothermal synthesis of nitrogen-doped carbon quantum dots from microcrystalline cellulose for the detection of Fe3+ ions in an acidic environment [J] . Wu Peng, Li Wei, Wu Qiong, RSC Advances . 2017,第70期

机译：微晶纤维素中氮掺杂碳量子点的水热合成检测酸性环境中Fe3 +离子的方法

2. Hydrothermal synthesis of nitrogen-doped carbon quantum dots from microcrystalline cellulose for the detection of Fe3+ ions in an acidic environment [J] . Peng Wu, Wei Li, Qiong Wu, RSC Advances . 2017,第70期

机译：从微晶纤维素水热合成氮掺杂碳量子点，用于在酸性环境中检测Fe 3 + 离子

3. One-pot synthesis of 2,2'-dipicolylamine derived highly photoluminescent nitrogen-doped carbon quantum dots for Fe3+ detection and fingermark detection [J] . Li Quan, Guo Zhiwei, Zhao Xiaoyan, Nanotechnology . 2020,第33期

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机译：柠檬酸碳化合成高发光碳量子点的研究进展

5. Synthesis, characterization and application of luminescent quantum dots and microcrystalline phosphors. [D] . Kang, Zhitao. 2006

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6. Synthesis of Nitrogen-Doped Lignin/DES Carbon Quantum Dots as a Fluorescent Probe for the Detection of Fe3+ Ions [O] . Xueqin Jiang, Yixin Shi, Xin Liu, 2018

机译：氮掺杂木质素/ DES碳量子点的合成作为荧光探针检测Fe3 +离子

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6. 类镍Ag<'20+>离子3D<'9>4s，3d<'9>4p，3d<'9>4d组态原子参数的计算 [C] . 吉世印 . 第九届全国原子与分子物理学术会议 . 1998

7. 氮掺杂碳量子点的制备及其在荧光微球和Fe3+检测中的应用 [A] . 何艳飞 . 2018

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Hydrothermal synthesis of nitrogen-doped carbon quantum dots from microcrystalline cellulose for the detection of Fe3+ ions in an acidic environment

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