N-doped carbon dots with high sensitivity and selectivity for hypochlorous acid detection and its application in water

2015 ◽  
Vol 7 (12) ◽  
pp. 5311-5317 ◽  
Author(s):  
Dongmei Wang ◽  
Hui Xu ◽  
Baozhan Zheng ◽  
Yang Li ◽  
Maoping Liu ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Hypochlorous Acid ◽  
High Sensitivity ◽  
Sensitivity And Selectivity ◽  
Doped Carbon Dots

The as-prepared N-doped CDs were applied as a HOCl sensor with high sensitivity and selectivity.

Green preparation of carbon dots for Hg2+ detection and cell imaging

2020 ◽  
Vol 10 (11) ◽  
pp. 1777-1787
Author(s):  
Yadian Xie ◽  
Shanshan Wang ◽  
Ning Fu ◽  
Yan Yang ◽  
Xingliang Liu ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Carbon Dots ◽  
High Sensitivity ◽  
Amorphous Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Carbon And Nitrogen ◽  
Transmission Electron ◽  
Sensitivity And Selectivity ◽  
Ft Ir

Carbon dots (CDs) also nitrogen-doped CDs (N-CDs) were produced by green hydrothermal synthesis using Pea and ethanediamine as the carbon and nitrogen source, separately. Transmission electron microscopy (TEM) images displayed that the prepared CDs and N-CDs were well dispersed, had a spherical morphology. X-ray diffraction (XRD) figures of CDs and N-CDs presented a graphitic amorphous structure. Fourier transform infrared spectroscopy (FT-IR) verified that CDs and N-CDs carried many different hydrophilic groups (for example hydroxyl, carboxyl/carbonyl, amide, amino groups) on the surface, X-ray photoelectron spectroscopy (XPS) together verified this result. However, the optical properties and fluorescence quantum yield for N-CDs were obviously superior to those of CDs. Furthermore, the prepared N-CDs displayed outstanding advantages including low toxicity, satisfactory biocompatibility, and excellent chemical stability. More prominently, the prepared N-CDs could detect Hg2+ ions with high sensitivity and selectivity in both water samples and HeLa cells.

scholarly journals A novel fluorescent sensor based on sulfur and nitrogen co-doped carbon dots with excellent stability for selective detection of doxycycline in raw milk

RSC Advances ◽  
2017 ◽  
Vol 7 (21) ◽  
pp. 12827-12834 ◽  
Author(s):  
Jinping Song ◽  
Jing Li ◽  
Ziying Guo ◽  
Wen Liu ◽  
Qi Ma ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Fluorescent Sensor ◽  
Raw Milk ◽  
Selective Detection ◽  
Sensitivity And Selectivity ◽  
Doped Carbon Dots ◽  
Co Doped ◽  
Excellent Stability

Sulfur and nitrogen co-doped carbon dots obtained from casein exhibited excellent sensitivity and selectivity for the detection of doxycycline.

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: mechanism investigation and their application for label free CA125 analysis

2019 ◽  
Vol 7 (19) ◽  
pp. 3053-3058 ◽  
Author(s):  
Yuanyuan Liu ◽  
Liping Jiang ◽  
Bijun Li ◽  
Xinyue Fan ◽  
Wei Wang ◽  
...  
Keyword(s):  
Nitrogen Doping ◽  
Competitive Adsorption ◽  
High Sensitivity ◽  
Label Free ◽  
Nitrogen Doped ◽  
Microwave Assisted ◽  
Turn On ◽  
Sensitivity And Selectivity ◽  
Doped Carbon Dots ◽  
Nitrogen Doped Carbon

Nitrogen-doped CDs (N-CDs) were firstly prepared by using pear juice as the carbon source and ethanediamine as a nitrogen doping precursor with a microwave assisted pyrolysis technique. Based on the fluorescence recovery induced by competitive adsorption and desorption, a label-free “turn on” fluorescence assay with high sensitivity and selectivity was proposed for the analysis of CA125.

Development of N,S-doped carbon dots as a novel matrix for the analysis of small molecules by negative ion MALDI-TOF MS

RSC Advances ◽  
2016 ◽  
Vol 6 (82) ◽  
pp. 79043-79049 ◽  
Author(s):  
Yanwei Wang ◽  
Dan Gao ◽  
Yongli Chen ◽  
Guangnan Hu ◽  
Hongxia Liu ◽  
...  
Keyword(s):  
Salt Tolerance ◽  
Small Molecules ◽  
Carbon Dots ◽  
High Sensitivity ◽  
Negative Ion ◽  
Good Reproducibility ◽  
High Salt Tolerance ◽  
Small Molecule Analysis ◽  
Doped Carbon Dots ◽  
Tof Ms

The synthesized N,S-CDs was firstly used as a matrix for small molecule analysis with good reproducibility, high sensitivity and high salt tolerance.

Carbon dots–MnO2 nanocomposites for As(iii) detection in groundwater with high sensitivity and selectivity

2020 ◽  
Vol 12 (46) ◽  
pp. 5572-5580
Author(s):  
Xiaoyu He ◽  
Yong Li ◽  
Chao Yang ◽  
Liqiang Lu ◽  
Yulun Nie ◽  
...  
Keyword(s):  
Human Health ◽  
Carbon Dots ◽  
High Sensitivity ◽  
Environmental Safety ◽  
Sensitivity And Selectivity

As(iii) pollution has caused increasing concern due to its significant impact in environmental safety and human health.

A nanosensor made of sulfur–nitrogen co-doped carbon dots for “off–on” sensing of hypochlorous acid and Zn(ii) and its bioimaging properties

2018 ◽  
Vol 42 (19) ◽  
pp. 15895-15904 ◽  
Author(s):  
Zhengwei Zhang ◽  
Ke Pei ◽  
Qiulian Yang ◽  
Jiayu Dong ◽  
Zhengyu Yan ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Hypochlorous Acid ◽  
One Step ◽  
Doped Carbon Dots ◽  
Co Doped

In this study, we present a facile one-step solvothermal strategy for the fabrication of sulfur–nitrogen co-doped carbon dots (SNCDs) using p-phenylenediamine and cysteamine hydrochloride as the precursors.

Valine-derived carbon dots with colour-tunable fluorescence for the detection of Hg2+ with high sensitivity and selectivity

2015 ◽  
Vol 39 (8) ◽  
pp. 6201-6206 ◽  
Author(s):  
Chunfang Zhang ◽  
Zhongbo Hu ◽  
Li Song ◽  
Yanyan Cui ◽  
Xiangfeng Liu
Keyword(s):  
Carbon Dots ◽  
High Sensitivity ◽  
Sensitivity And Selectivity ◽  
Fluorescent Carbon Dots ◽  
Fluorescent Carbon

Green and yellow fluorescent carbon dots with high sensitivity and selectivity for Hg2+ were synthesized from H3PO4 oxidation of valine.

Highly selective and sensitive sensing for Al3+ and F− based on green photoluminescent carbon dots

RSC Advances ◽  
2016 ◽  
Vol 6 (99) ◽  
pp. 97346-97351 ◽  
Author(s):  
Xiang-Ying Sun ◽  
Lu-Lu Wu ◽  
Jiang-Shan Shen ◽  
Xue-Gong Cao ◽  
Cunjin Wen ◽  
...  
Keyword(s):  
Metal Ions ◽  
Carbon Dots ◽  
High Sensitivity ◽  
Sensitivity And Selectivity

A novel sensor for metal ions by mean of CDs with a PL enhancement response, which shows high sensitivity and selectivity. Furthermore, the CDs-Al3+ ions system could be employed to probe F− anions based on a PL “on–off” model.

Sign in / Sign up

Export Citation Format

Share Document