scholarly journals Sulfur-doped carbon dots synthesis under microwave irradiation as turn-off fluorescent sensor for Cr(III)

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Siti Raudhatul Kamali ◽  
Chang-Nan Chen ◽  
Dinesh Chandra Agrawal ◽  
Tai-Huei Wei
Keyword(s):  
Microwave Irradiation ◽  
Carbon Dots ◽  
Fluorescent Sensor ◽  
Blue Emission ◽  
Inner Filter Effect ◽  
High Quantum Yield ◽  
Microwave Irradiation Method ◽  
Quenching Mechanism ◽  
One Step ◽  
Doped Carbon Dots

AbstractThis study synthesized a facile and high sensitive fluorescent probe based on sulfur-doped carbon dots (S-CDs) using a one-step microwave irradiation method. The probe exhibited a strong blue emission and a high quantum yield (QY) of 36.40%. In the detection, the presence of trivalent chromium (Cr(III)) strongly quenched the PL intensity of S-CDs by the inner filter effect (IFE) quenching mechanism of Cr(III) on the S-CDs. The S-CDs exhibited good sensitivity to turn-off Cr(III) detection with a linear range concentration of 0–45 μM and a detection limit of 0.17 μM. Furthermore, the proposed method has been successfully applied for Cr(III) detection in natural water samples with the 93.68–106.20% recoveries.

scholarly journals One-step fabrication of high quantum yield sulfur- and nitrogen-doped carbon dots for sensitive and selective detection of Cr(vi)

RSC Advances ◽  
2016 ◽  
Vol 6 (109) ◽  
pp. 107717-107722 ◽  
Author(s):  
Saihua Wang ◽  
Hongyun Niu ◽  
Sijing He ◽  
Yaqi Cai
Keyword(s):  
Quantum Yield ◽  
Carbon Dots ◽  
Fluorescent Sensor ◽  
Selective Detection ◽  
High Quantum Yield ◽  
Nitrogen Doped ◽  
High Quantum ◽  
One Step ◽  
Doped Carbon Dots ◽  
Nitrogen Doped Carbon

Easily synthesized high quantum yield sulfur- and nitrogen-doped carbon dots can serve as a very efficient fluorescent sensor for the detection of Cr(vi).

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.

Facile one-step synthesis of highly luminescent N-doped carbon dots as an efficient fluorescent probe for chromium(vi) detection based on the inner filter effect

2018 ◽  
Vol 42 (5) ◽  
pp. 3729-3735 ◽  
Author(s):  
Haitao Wang ◽  
Shan Liu ◽  
Yisha Xie ◽  
Jingran Bi ◽  
Yao Li ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Carbon Dots ◽  
Inner Filter Effect ◽  
Fluorescence Assay ◽  
Assay System ◽  
Label Free ◽  
Chromium Vi ◽  
Filter Effect ◽  
One Step ◽  
Doped Carbon Dots

Label-free fluorescence assay system is designed for Cr(iv) detection.

scholarly journals Manganese-Doped Carbon Dots Via Inner Filter Effect for the Sensitive Detection of Tetracycline in Poultry Meat Samples

2021 ◽  
pp. 38-46
Author(s):  
Ke Su ◽  
Guoqiang Xiang ◽  
Yunlong Zhang ◽  
Xin Wang ◽  
Linhui Wang ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Inner Filter Effect ◽  
Poultry Meat ◽  
Excitation Wavelength ◽  
Ultraviolet Emission ◽  
Characteristic Absorption Peak ◽  
Filter Effect ◽  
One Step ◽  
Meat Samples ◽  
Doped Carbon Dots

In this study, a rapid and sensitive analytical method has been developed to detect tetracycline hydrochloride (TC) using manganese-doped carbon dots (Mn-CDs) prepared by one-step hydrothermal procedure using 1-(2-pyridinylazo)-2-naohthalenol (PAN) and MnCl2 as precursor reagents. The obtained Mn-CDs showed an ultraviolet emission at 360 nm with an excitation wavelength of 300 nm. TC has a strong characteristic absorption peak at 356 nm, which has a large spectral overlap with the emission band of the Mn-CDs. The fluorescence intensity (FI) of Mn-CDs at 360 nm is linearly quenched within the TC concentration range of 0.1-200 µM. The developed assay for the detection of TC was based on an inner filter effect (IFE) mechanism and is rapid, sensitive, and was successfully applied for the determination of TC in different poultry meat samples with satisfactory results.

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.

High Quantum Yield Fluorescent Chitosan-Based Carbon Dots for the Turn-On-Off-On Detection of Cr(VI) and H2O2

NANO ◽  
2021 ◽  
pp. 2150103
Author(s):  
Yudong Zhang ◽  
Yan Dong ◽  
Haifu Zheng ◽  
Xueyun Yang ◽  
Cheng Yao
Keyword(s):  
Quantum Yield ◽  
Carbon Dots ◽  
Blue Emission ◽  
Inner Filter Effect ◽  
Hydrothermal Carbonization ◽  
Reduction Reaction ◽  
High Quantum Yield ◽  
One Pot ◽  
Quenching Effect ◽  
High Quantum

One-pot hydrothermal carbonization approach was employed to synthesize the blue-emission carbon dots derived from chitosan (Cs) and o-phenylenediamine (OPD). The Cs-based carbon dots (Cs–CDs) possessed a certain high quantum yield of 58% and exhibited excellent solubility, stability and fluorescence response in aqueous solutions. The Cs–CDs were designed as a sensor for Cr(VI) and H2O2 determination. The sensing strategy of Cr(VI) was based on the inner filter effect (IFE) and static quenching effect (SQE), showing a good linear correlation ranging from 1 to 130[Formula: see text][Formula: see text]M with a detection limit (LOD) of 0.91[Formula: see text][Formula: see text]M. In addition, the determination for H2O2 was attributed to the elimination of IFE (EIFE) due to the reduction reaction and the detection for H2O2 was in the linear range from 1.0 to 200.0[Formula: see text][Formula: see text]M with LOD of 0.51[Formula: see text][Formula: see text]M. Finally, the proposed designed sensor could be simply applied for detection of Cr(VI) and H2O2 in real samples.

Highly Photoluminescent Carbon Dots with pH-Dependent Switchable Fluorescence and Sensitivity to Tetracycline

NANO ◽  
2021 ◽  
pp. 2150036
Author(s):  
Chengwei Wang ◽  
Lei Li ◽  
Yamin Wu ◽  
Jiao Gu ◽  
Chaoqun Ma ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Water Solubility ◽  
Ph Value ◽  
Limit Of Detection ◽  
Temperature Stability ◽  
High Quantum Yield ◽  
Light Stability ◽  
One Step ◽  
Doped Carbon Dots ◽  
Nitrogen Doped Carbon

In this paper, multifunctional nitrogen-doped carbon dots (N-CDs) were synthesized from 3,5-diaminobenzonitrile by a simple one-step hydrothermal method. The N-CDs have a high quantum yield of 67.0% in ethanol with great water solubility, temperature stability, light stability and resistance to ion interference. Experiments showed that pH has an effect on the fluorescence intensity and emission wavelength of N-CDs. Especially, the switchable fluorescence of N-CDs caused by changes of pH value could be distinguished to the naked eye. Additionally, the multifunctional N-CDs also showed a selective response to tetracycline. We studied the influence of tetracycline on the luminescence intensity of N-CDs in the concentration range of 0–1000[Formula: see text][Formula: see text]g/L. A linear equation was established in the range of 10–80[Formula: see text][Formula: see text]g/L with a limit of detection (LOD) of 3.5[Formula: see text][Formula: see text]g/L. Based on the above excellent characteristics, N-CDs are expected to be applied in the field of sensing.

Facile synthesis of nitrogen-doped carbon dots from pork liver and its sensing of 6-thioguanine based on inner filter effect

2021 ◽  
Author(s):  
Wenjing Chen ◽  
Jun Fan ◽  
Xianxue Wu ◽  
Dongbao Hu ◽  
Yunying Wu ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Hydrothermal Method ◽  
Carbon Dots ◽  
Inner Filter Effect ◽  
Facile Synthesis ◽  
Nitrogen Doped ◽  
Pork Liver ◽  
One Step ◽  
Doped Carbon Dots ◽  
Nitrogen Doped Carbon

In this work, a facile one-step hydrothermal method was developed to synthesize nitrogen-doped carbon dots (N-CDs) using pork liver. The quantum yield of the prepared N-CDs was as high as...

Fast one-step synthesis of N-doped carbon dots by pyrolyzing ethanolamine

2014 ◽  
Vol 2 (36) ◽  
pp. 7477-7481 ◽  
Author(s):  
Xinwei Dong ◽  
Yanjie Su ◽  
Huijuan Geng ◽  
Zhongli Li ◽  
Chao Yang ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Carbon Dots ◽  
High Yield ◽  
One Step ◽  
Doped Carbon Dots

N-doped CDs can be obtained directly with high yield by pyrolyzing ethanolamine in air within just 7 minutes with the assistance of hydrogen peroxide.

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