A colorimetric paper sensor for visual detection of mercury ions constructed with dual-emission carbon dots

2018 ◽  
Vol 42 (19) ◽  
pp. 15671-15677 ◽  
Author(s):  
Yifan Wang ◽  
Liang Yang ◽  
Bianhua Liu ◽  
Shaoming Yu ◽  
Changlong Jiang
Keyword(s):  
Carbon Dots ◽  
Visual Detection ◽  
Mercury Ions ◽  
Ratiometric Fluorescence ◽  
Blue Fluorescence ◽  
Internal Reference ◽  
Dual Emission ◽  
Paper Sensor ◽  
Fluorescent Carbon Dots ◽  
Fluorescent Carbon

A ratiometric fluorescence nanosensor has been developed by mixing blue fluorescent carbon dots and red fluorescent carbon dots, where the blue fluorescence can be selectively quenched by Hg2+, while the red fluorescence is an internal reference.

scholarly journals Semi-quantitative and visual assay of copper ions by fluorescent test paper constructed with dual-emission carbon dots

RSC Advances ◽  
2018 ◽  
Vol 8 (23) ◽  
pp. 12708-12713 ◽  
Author(s):  
Yifan Wang ◽  
Mian Wu ◽  
Shaoming Yu ◽  
Changlong Jiang
Keyword(s):  
Carbon Dots ◽  
Copper Ions ◽  
Test Paper ◽  
Ratiometric Fluorescence ◽  
Dual Emission ◽  
Visual Assay ◽  
Fluorescent Carbon Dots ◽  
Fluorescent Carbon

A ratiometric fluorescence nanosensor has been developed by mixing blue fluorescent carbon dots and orange fluorescent carbon dots for the detection of copper ions.

Nitrogen-doped carbon dots from Hutai-8 grape skin and their application in Hg2+ detection

2020 ◽  
Vol 16 ◽  
Author(s):  
Pan Zhang ◽  
Shun-Sheng Zhao ◽  
JiaJia Wang ◽  
Xiang Rong Liu
Keyword(s):  
Heavy Metal ◽  
Carbon Source ◽  
Fluorescence Quenching ◽  
Hydrothermal Method ◽  
Water Samples ◽  
Carbon Dots ◽  
Mercury Ions ◽  
Grape Skin ◽  
Fluorescent Carbon Dots ◽  
Fluorescent Carbon

Background: In recent years, environmental pollution and heavy metal pollution caused by rapid urbanization and industrialization have become increasingly serious. Among them, mercury (II) ion (Hg2+) is one of the highly toxic heavy metal ions, and its pollution comes from various natural resources and human activities. Therefore, people attach great importance to the development of analytical methods for effective analysis and sensitive detection of Hg2+ . Objective: Using grape skin as a green and environmental friendly carbon source, to synthesize fluorescent carbon dots, and try to apply them to the detect the concentration of Hg2+ in water. Method: Using "Hutai No. 8" grape skin as carbon source, fluorescent carbon dots were synthesized by one-step hydrothermal method. Structure and fluorescent properties of the carbon dots were tested using TEM, XPS, XRD and other characterization instruments, and their utilization on detection of mercury ions in the actual water samples was explored. Results: The CDs had a particle size of about 4.8 nm and a spherical shape. There are N-H, C-N, C=O and other functional groups on the surface. It was found that Hg2+ has obvious fluorescence quenching effect on CDs, and thus CDs fluorescence quenching method to detect the concentration Hg2+ was established, and the detection limit is 3.7 μM, which could be applied to test the concentration of Hg2+ in water samples. Conclusion: Using grape skin as carbon source, fluorescent carbon dots were successfully synthesized by hydrothermal method. Carbon dots were used to detect mercury ions in water, and a method for detecting mercury ions in actual water samples was established.

Red fluorescent carbon dots excited by visible light: cell imaging and visual detection of ammonia gas using PVB films

2021 ◽  
Author(s):  
Bingyan Han ◽  
Jingmei Jiang ◽  
Qifang Yan ◽  
Jing Zhao ◽  
Ze Xin ◽  
...  
Keyword(s):  
Visible Light ◽  
Carbon Dots ◽  
Cell Imaging ◽  
Visual Detection ◽  
Ammonia Gas ◽  
Light Cell ◽  
Fluorescent Carbon Dots ◽  
Fluorescent Carbon

Red fluorescent carbon dots are used in cell imaging and detection of ammonia gas using PVB films under visible light.

Synthesis of the Cu-Doped Dual-Emission Fluorescent Carbon Dots and Its Analytical Application

Langmuir ◽  
2018 ◽  
Vol 34 (34) ◽  
pp. 9982-9989 ◽  
Author(s):  
Pan-pan Zhu ◽  
Zhen Cheng ◽  
Ling-ling Du ◽  
Qian Chen ◽  
Ke-jun Tan
Keyword(s):  
Carbon Dots ◽  
Analytical Application ◽  
Dual Emission ◽  
Fluorescent Carbon Dots ◽  
Fluorescent Carbon

One-pot hydrothermal synthesis of dual-emission fluorescent carbon dots for hypochlorous acid detection

2020 ◽  
Vol 180 ◽  
pp. 108507 ◽  
Author(s):  
Cheng Zhang ◽  
Meilin Liu ◽  
Taotao Li ◽  
Shengjun Liu ◽  
Qian Chen ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Carbon Dots ◽  
Hypochlorous Acid ◽  
One Pot ◽  
Dual Emission ◽  
Fluorescent Carbon Dots ◽  
Fluorescent Carbon

Anti-counterfeiting application of fluorescent carbon dots derived from wasted coffee grounds

Optik ◽  
2021 ◽  
pp. 166449
Author(s):  
Woo Tae Hong ◽  
Jin Young Park ◽  
Jong Won Chung ◽  
Hyun Kyoung Yang ◽  
Jae-Yong Je
Keyword(s):  
Carbon Dots ◽  
Coffee Grounds ◽  
Fluorescent Carbon Dots ◽  
Fluorescent Carbon
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