Citation: KANG Ya-Chao, HUANG Yuan-Yuan, SUN Hua-Zhen, ZHENG Wan-Li, MA Xian-Li, JIANG Dong-Li. Nitric Acid Assisted Synthesis of Water-Soluble Green Fluorescent Carbon Dots for pH Measurement and Fe³⁺ Ions Detection[J]. Chinese Journal of Inorganic Chemistry, ;2020, 36(9): 1744-1752. doi: 10.11862/CJIC.2020.194 shu

Nitric Acid Assisted Synthesis of Water-Soluble Green Fluorescent Carbon Dots for pH Measurement and Fe³⁺ Ions Detection

1.
Pharmacy College, Guilin Medical University, Guilin, Guangxi 541100, China
2.
College of Materials Science and Engineering, Guilin University of Technology, Guilin, Guangxi 541004, China

Corresponding author: JIANG Dong-Li, auqfai@glmc.edu.cn
Received Date: 27 December 2019
Revised Date: 22 April 2020

Figures(5)

A green fluorescent carbon dots (CDs) was synthesized from citric acid, formamide and concentrated nitric acid. The phase compositions, morphologies and fluorescence properties were characterized. The applications of the as-prepared CDs in ion detection and fluorescence imaging were studied as well. The results show that the as-synthesized CDs presented a good water-solubility and emitted bright green fluorescence with an excitation-independent photoluminescence (PL) behavior when the excitation wavelength ranged from 360 to 460 nm. The quantum yield was as high as 44.2%. Meanwhile, the green fluorescent CDs was pH sensitive and the normalized fluorescence intensity was linearly proportional to the pH values of solutions in a range of 4.5~8.5. Furthermore, the CDs also exhibited excellent selective response to Fe³⁺ with a good linear relationship between the fluorescence quenching efficiency (I₀/I) and the Fe³⁺ concentration in a range of 0~1 000 μmol·L^-1, and the detection limit was calculated to be 9.8 μmol·L^-1.
- green fluorescent carbon dots,
- water-soluble,
- fluorescent imaging material,
- iron ion detection,
- pH response
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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Nitric Acid Assisted Synthesis of Water-Soluble Green Fluorescent Carbon Dots for pH Measurement and Fe3+ Ions Detection

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通讯作者: 陈斌, bchen63@163.com

Nitric Acid Assisted Synthesis of Water-Soluble Green Fluorescent Carbon Dots for pH Measurement and Fe³⁺ Ions Detection