Citation: Qi WANG, Ying CHENG, Yuyan WANG, Yibing XIAO, Haozhe LU, Yansong ZHANG, Shengling LI, Jiazi TANTAI, Na SUN, Lifeng DING, Jinqin GUO, Peng JIN. "Shining dot" in vinegar—Extraction of carbon quantum dots and the fluorescence properties analysis[J]. Chinese Journal of Inorganic Chemistry, ;2026, 42(1): 87-96. doi: 10.11862/CJIC.20250127 shu

"Shining dot" in vinegar—Extraction of carbon quantum dots and the fluorescence properties analysis

Qi WANG ^{1, 2,,} ,
Ying CHENG ¹ ,
Yuyan WANG ¹ ,
Yibing XIAO ¹ ,
Haozhe LU ¹ ,
Yansong ZHANG ¹ ,
Shengling LI ¹ ,
Jiazi TANTAI ² ,
Na SUN ¹ ,
Lifeng DING ^1,, ,
Jinqin GUO ^2,, ,
Peng JIN ³

1.
Chemistry & Chemical Engineering Department, Taiyuan Institute of Technology, Taiyuan 030008, China
2.
Association for Science and Technology, Taiyuan Institute of Technology, Taiyuan 030008, China
3.
Shanxi Provincial Science and Technology Museum, Taiyuan 030021, China

Corresponding author: Qi WANG, wangq@tit.edu.cn Lifeng DING, dinglf@tit.edu.cn Jinqin GUO, guojq@tit.edu.cn
Received Date: 14 April 2025
Revised Date: 12 November 2025

Figures(7)

This study developed a facile and green method using vinegar as the carbon source to prepare fluorescent carbon quantum dots (vCDs) via direct dialysis. The synthesized vCDs were characterized by morphology, composition, and fluorescent properties. The results showed that the vCDs had a mass concentration of 0.006 2 g·mL^-1. The vCDs showed the uniform particle distribution with an average size of 4.05 nm and displayed optimal fluorescence emission at 460 nm. Notably, the vCDs showed excellent photostability and salt resistance. Furthermore, the fluorescence of vCDs was highly sensitive to pH due to the surface protonation effects and Fe³⁺ via selective fluorescence quenching, which endowed the potential capacity in pH and Fe³⁺ sensing. Besides, vCDs were incorporated into polyvinyl butyral (PVB) to fabricate the fluorescent films.
- carbon quantum dots,
- vinegar,
- fluorescence properties,
- science popularization
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