scholarly journals Detection of Melamine Based on the Fluorescence Changes of Nitrogen-Doped Carbon Dots

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Wenzhi Yin ◽  
Chaoqun Ma ◽  
Tuo Zhu ◽  
Jiao Gu ◽  
Chun Zhu ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Detection Method ◽  
Limit Of Detection ◽  
High Sensitivity ◽  
Mercury Ions ◽  
Measuring Range ◽  
Nitrogen Doped ◽  
One Step ◽  
Doped Carbon Dots ◽  
Nitrogen Doped Carbon

In order to determine the concentration of melamine, nitrogen-doped carbon dots (NCDs) were synthesized in one step as a fluorescent probe. Uric acid and diethylenetriamine were used as carbon source and nitrogen source, respectively. The experimental results showed that the fluorescence of NCDs can be quenched by mercury ions (Hg2+). Due to the strong coordination affinity between the carbon-nitrogen heterocyclic of melamine and Hg2+, part of Hg2+ coordinated with melamine when melamine was mixed with Hg2+. Then, the fluorescence of the added NCDs was quenched by the remaining Hg2+. Therefore, the concentration of melamine could be determined. The results show that the method has high sensitivity in wide measuring range that the linear ranges are 50–400 μg/L and 800–2500 μg/L, and the R2 is 0.997 and 0.988, respectively, with the limit of detection (LOD) of 21.76 μg/L. The NCDs are easy to fabricate, and the detection method is easy to implement. In this study, a new method for melamine detection was established, and the proposed method for melamine detection can provide some insights for food safety detection.

Nitrogen-doped carbon dots as fluorescent probe for detection of curcumin based on the inner filter effect

RSC Advances ◽  
2015 ◽  
Vol 5 (115) ◽  
pp. 95054-95060 ◽  
Author(s):  
Qingyan Zhang ◽  
Caihong Zhang ◽  
Zengbo Li ◽  
Jinyin Ge ◽  
Chenzhong Li ◽  
...  
Keyword(s):  
Citric Acid ◽  
Carbon Source ◽  
Nitrogen Source ◽  
Carbon Dots ◽  
Inner Filter Effect ◽  
Nitrogen Doped ◽  
Filter Effect ◽  
One Step ◽  
Doped Carbon Dots ◽  
Nitrogen Doped Carbon

A facile, economical and green one-step hydrothermal method for N-doped CDs was presented by using citric acid as carbon source and urea as nitrogen source. The fluorescence of N-doped CDs quenched dramatically from curcumin via inner filter effect.

One-step synthesis of robust nitrogen-doped carbon dots: acid-evoked fluorescence enhancement and their application in Fe3+ detection

2015 ◽  
Vol 3 (34) ◽  
pp. 17747-17754 ◽  
Author(s):  
Yang Liu ◽  
Yanan Liu ◽  
Soo-Jin Park ◽  
Yifan Zhang ◽  
Taewoo Kim ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Fluorescence Enhancement ◽  
Alginic Acid ◽  
Nitrogen Doped ◽  
One Step ◽  
Doped Carbon Dots ◽  
Nitrogen Doped Carbon

Robust and highly fluorescent N-doped carbon dots (CDs) are obtained from a hybrid source, alginic acid and ethanediamine.

Microplasma-assisted rapid synthesis of luminescent nitrogen-doped carbon dots and their application in pH sensing and uranium detection

Nanoscale ◽  
2015 ◽  
Vol 7 (48) ◽  
pp. 20743-20748 ◽  
Author(s):  
Zhe Wang ◽  
Yuexiang Lu ◽  
Hang Yuan ◽  
Zhonghua Ren ◽  
Chao Xu ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Carbon Dots ◽  
Ph Sensing ◽  
Rapid Synthesis ◽  
Nitrogen Doped ◽  
One Step ◽  
Doped Carbon Dots ◽  
Nitrogen Doped Carbon

We developed a rapid one-step atmospheric-pressure microplasma-assisted method to prepare carbon dots for pH sensing and uranium detection.

One-step hydrothermal synthesis and optical properties of PEG-passivated nitrogen-doped carbon dots

RSC Advances ◽  
2015 ◽  
Vol 5 (10) ◽  
pp. 7395-7400 ◽  
Author(s):  
Ben-Xing Zhang ◽  
Gang-Yi Zhang ◽  
Hui Gao ◽  
Shao-Hui Wu ◽  
Jian-Hua Chen ◽  
...  
Keyword(s):  
Optical Properties ◽  
Hydrothermal Synthesis ◽  
Luminescence Intensity ◽  
Carbon Dots ◽  
Nitrogen Doped ◽  
One Step ◽  
Doped Carbon Dots ◽  
Nitrogen Doped Carbon

PEG-passivation enhanced the luminescence intensity of nitrogen-doped carbon dots markedly.

scholarly journals Preparation of nitrogen-doped carbon dots with high quantum yield from Bombyx mori silk for Fe(iii) ions detection

RSC Advances ◽  
2017 ◽  
Vol 7 (80) ◽  
pp. 50584-50590 ◽  
Author(s):  
Hui Liu ◽  
Yue Zhang ◽  
Jia Hui Liu ◽  
Peng Hou ◽  
Jun Zhou ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Bombyx Mori ◽  
Carbon Dots ◽  
High Quantum Yield ◽  
Luminescent Probes ◽  
Nitrogen Doped ◽  
Bombyx Mori Silk ◽  
One Step ◽  
Doped Carbon Dots ◽  
Nitrogen Doped Carbon

A facile one step hydrothermal method to prepare nitrogen-doped carbon dots (CDs) with a high photoluminescence quantum yield using Bombyx mori silk was established, and CDs were applied as luminescent probes for selective detection of Fe3+ ions.

One-step hydrothermal synthesis of nitrogen-doped carbon dots for high-sensitivity visual detection of nitrite and ascorbic acid

2021 ◽  
Author(s):  
yafeng Deng ◽  
Yihua Zhou ◽  
Qingzhi Li ◽  
Jun Qian
Keyword(s):  
Ascorbic Acid ◽  
Visual Detection ◽  
High Sensitivity ◽  
Human Metabolism ◽  
Nitrogen Doped ◽  
One Step ◽  
Excessive Intake ◽  
Doped Carbon Dots ◽  
Nitrogen Doped Carbon

Ascorbic acid (AA) plays the role of one indispensable vitamin for the human body and is associated with the critical processes of human metabolism. However, excessive intake of AA can...

One-step Hydrothermal Synthesis of Nitrogen-doped Carbon Dots as a Super Selective and Sensitive Probe for Sensing of Metronidazole in Multiple samples

2021 ◽  
Author(s):  
Jinyan Du ◽  
Chaofeng Wang ◽  
Pingchuan Yuan ◽  
Qin Shu ◽  
Na Xu ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Carbon Dots ◽  
Nitrogen Doped ◽  
One Step ◽  
Doped Carbon Dots ◽  
Nitrogen Doped Carbon ◽  
Multiple Samples

A reliable, super selective and sensitive nitrogen-doped carbon dots (N-CDs) nanoprobe that can quantitatively and quickly detect the concentration of metronidazole (MTZ) in multiple samples was built up. We first...

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