Next Article in Journal
Effect of Concentration and pH on the Photoluminescent Properties of CQDs Obtained from Actinidia deliciosa
Next Article in Special Issue
An Insight into Synthesis, Optical Properties, and Applications of Green Fluorescent Carbon Dots
Previous Article in Journal
Development and Research Status of Wear-Resistant Coatings on Copper and Its Alloys: Review
 
 
Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
Journals
Crystals
Volume 15
Issue 3
10.3390/cryst15030205
crystals-logo
Submit to this Journal Review for this Journal Propose a Special Issue
► Article Menu

Article Menu

share Share announcement Help format_quote Cite question_answer Discuss in SciProfiles
first_page
settings
Order Article Reprints
Font Type:
Arial Georgia Verdana
Font Size:
Aa Aa Aa
Line Spacing:
Column Width:
Background:
Article

Controllable Functionalization of Carbon Dots as Selective and Sensitive Fluorescent Probes for Sensing Cu(II) Ions

by
Xiaochun Zheng
1,*,†,
Hao Zhang
2,†,
Haoming Jiang
1,
Lei Sun
1,
Yuanze Sun
3,
Qingcao Liu
2,
Shoutian Ren
2,*,
Yunpeng Zhuang
3 and
Xiaofeng Gong
1
1
Department of Intelligent Manufacturing, Yantai Vocational College, Yantai 264670, China
2
Department of Optoelectronic Science, Harbin Institute of Technology at Weihai, Weihai 264209, China
3
Department of Intelligent Control, Yantai Vocational College, Yantai 264670, China
*
Authors to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Crystals 2025, 15(3), 205; https://doi.org/10.3390/cryst15030205
Submission received: 21 January 2025 / Revised: 11 February 2025 / Accepted: 17 February 2025 / Published: 21 February 2025
(This article belongs to the Special Issue Research Progress of Photoluminescent Materials)
Browse Figures
Versions Notes

Abstract

Carbon dots (CDs) are efficient fluorescent probes for metal ion detection due to their high sensitivity, nontoxicity and stability, but their rich functional groups lead to simultaneous responses to multiple ions. So, how to realize highly selective detection for specific ions is still a challenging task. In this work, “bare CDs” were synthesized using the electrochemical stripping method, followed by grafting with hydroxyl and carboxyl groups following the hydrothermal method with boric acid. Transmission electron microscopy, an X-ray diffractometer, Fourier transform infrared spectroscopy, UV–visible spectrophotometers and a fluorescence spectrometer were used to characterize their morphology, surface functional groups and optical properties, respectively. The modified CDs exhibit a high sensitivity of 65% and selectivity towards Cu2+. Meanwhile, they also exhibited a short response time of less than 1 min and a good stability in terms of pH and ionic strength.
Keywords: fluorescent sensors; copper ion detection; functionalization; functional groups; quenching mechanism fluorescent sensors; copper ion detection; functionalization; functional groups; quenching mechanism

Share and Cite

MDPI and ACS Style

Zheng, X.; Zhang, H.; Jiang, H.; Sun, L.; Sun, Y.; Liu, Q.; Ren, S.; Zhuang, Y.; Gong, X. Controllable Functionalization of Carbon Dots as Selective and Sensitive Fluorescent Probes for Sensing Cu(II) Ions. Crystals 2025, 15, 205. https://doi.org/10.3390/cryst15030205

AMA Style

Zheng X, Zhang H, Jiang H, Sun L, Sun Y, Liu Q, Ren S, Zhuang Y, Gong X. Controllable Functionalization of Carbon Dots as Selective and Sensitive Fluorescent Probes for Sensing Cu(II) Ions. Crystals. 2025; 15(3):205. https://doi.org/10.3390/cryst15030205

Chicago/Turabian Style

Zheng, Xiaochun, Hao Zhang, Haoming Jiang, Lei Sun, Yuanze Sun, Qingcao Liu, Shoutian Ren, Yunpeng Zhuang, and Xiaofeng Gong. 2025. "Controllable Functionalization of Carbon Dots as Selective and Sensitive Fluorescent Probes for Sensing Cu(II) Ions" Crystals 15, no. 3: 205. https://doi.org/10.3390/cryst15030205

APA Style

Zheng, X., Zhang, H., Jiang, H., Sun, L., Sun, Y., Liu, Q., Ren, S., Zhuang, Y., & Gong, X. (2025). Controllable Functionalization of Carbon Dots as Selective and Sensitive Fluorescent Probes for Sensing Cu(II) Ions. Crystals, 15(3), 205. https://doi.org/10.3390/cryst15030205

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

Article Metrics

Back to TopTop