scholarly journals A Fluorescence Method Based on N, S-Doped Carbon Dots for Detection of Ammonia in Aquaculture Water and Freshness of Fish

2021 ◽  
Vol 13 (15) ◽  
pp. 8255
Author(s):  
Jiaran Zhang ◽  
Zeyu Xu ◽  
Ce Shi ◽  
Xinting Yang
Keyword(s):  
Water Samples ◽  
Carbon Dots ◽  
Water Environment ◽  
Photoluminescence Properties ◽  
Quenching Mechanism ◽  
Relative Standard ◽  
Ammonia Detection ◽  
Fluorescence Quenching Mechanism ◽  
Doped Carbon Dots ◽  
Aquaculture Water

Excessive ammonia can cause the death of fish and the eutrophication of the water environment, so ammonia detection is essential for environmental monitoring. In this study, a highly selective sensing strategy for ammonia detection based on N, S co-doped carbon dots (N, S-CDs) was developed. The as-prepared N, S-CDs exhibited excellent photoluminescence properties and fluorescent stability. N, S-CDs demonstrated fluorescence quenched in the presence of ammonia in the wide linear range of 2–80 mmol/L, and were highly selective towards ammonia over metal ions. Furthermore, a possible fluorescence quenching mechanism is proposed. N, S-CDs were further applied to detection of ammonia in aquaculture water samples and river water samples, showing good practicability with recoveries from 0.93 to 1.27 and relative standard deviations (RSDs) of 0.54% to 17.3%. N, S-CDs were also successfully used to determine the freshness of bighead carps.

Facile synthesis of S, N co-doped carbon dots and investigation of their photoluminescence properties

2015 ◽  
Vol 17 (31) ◽  
pp. 20154-20159 ◽  
Author(s):  
Yue Zhang ◽  
Junhui He
Keyword(s):  
Carbon Dots ◽  
Photoluminescence Properties ◽  
Facile Synthesis ◽  
Photoluminescence Mechanism ◽  
Doped Carbon Dots ◽  
Co Doped

Carbon dots with stable down and up conversion fluorescence were synthesized and a unique photoluminescence mechanism is proposed.

Enhanced Photoluminescence Properties of Carbon Dots by Doping with Europium

2016 ◽  
Vol 16 (4) ◽  
pp. 3735-3738 ◽  
Author(s):  
Yuan Chen ◽  
Jiafu Xu ◽  
Bitao Liu ◽  
Jiyun Li ◽  
Xiaomei Fang ◽  
...  
Keyword(s):  
Particle Size ◽  
Polyethylene Glycol ◽  
Small Particle ◽  
Carbon Dots ◽  
Quantum Yields ◽  
Small Particle Size ◽  
Photoluminescence Properties ◽  
Enhanced Photoluminescence ◽  
Potential Applications ◽  
Doped Carbon Dots

Europium (Eu) doped carbon dots (CDs) were synthesized via a rapid and simple microwave mediated method using polyethylene glycol (PEG) as a precursor, and characterized in detail. The results were that these as-prepared CDs showed a uniform and small particle size, and exhibit good photostability and high photoluminescence quantum yields. Additionally, it also found that the doped Eu would change the fluorescence properties, which indicates potential applications in the field of biolabeling.

scholarly journals Comparison of the effects of synthesis methods of B, N, S, and P-doped carbon dots with high photoluminescence properties on HeLa tumor cells

RSC Advances ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 1098-1108
Author(s):  
Aswandi Wibrianto ◽  
Siti Q. Khairunisa ◽  
Satya C. W. Sakti ◽  
Yatim L. Ni'mah ◽  
Bambang Purwanto ◽  
...  
Keyword(s):  
Optical Properties ◽  
Tumor Cells ◽  
Carbon Dots ◽  
Synthesis Methods ◽  
Photoluminescence Properties ◽  
As Doping ◽  
Specific Targeting ◽  
Good Potential ◽  
Doped Carbon Dots ◽  
Boron Carbon

Investigation of the effect of nitrogen, boron, sulphur, and phosphor as doping elements on carbon dots, where boron-carbon dots performed good potential for bioimaging application with best optical properties and specific targeting features.

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 N-Doped Carbon Dots Derived from Melamine and Triethanolamine for Selective Sensing of Fe3+ Ions

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Sathishkumar Munusamy ◽  
Sathish Sawminathan ◽  
Thanigaivelan Arumugham ◽  
Maura Casales Díaz ◽  
Srinivas Godavarthi ◽  
...  
Keyword(s):  
Water Samples ◽  
Carbon Dots ◽  
Limit Of Detection ◽  
Blue Emission ◽  
World Health ◽  
Selective Determination ◽  
N Doping ◽  
Health Organization ◽  
Doped Carbon Dots ◽  
Nitrogen Doped Carbon

This work reports nitrogen-doped carbon dots (NCDs) as a selective sensing probe to detect Fe3+ in water samples. NCD probes were synthesized via solvothermal method using nitrogen-rich melamine and triethanolamine as precursors. Properties of the resulting NCDs were studied using different characterization techniques, through which N-doping was confirmed. The quantum yield of obtained NCDs was measured to be 21%. When excited at 370 nm, the excellent blue emission property makes this probe adoptable for selectively sensing Fe3+ in practical water samples. The limit of detection (LOD) was identified as 216 nM with a good linear range between the concentrations of 0.2-2 μM. The obtained LOD is far less than the World Health Organization (WHO) permissible limits of Fe3+ in water. Interference studies reveal that the presence of other competing ions did not alter the sensing of Fe3+, even at the presence of 10 equivalents which indicates the high selectivity of NCDs towards Fe3+. The reversibility studies showed that adding a cheap and readily available EDTA ligand to the NCD results in fluorescence regeneration, leading to exceptional reusability for the detection of Fe3+. So, the synthesized NCDs can be used as a suitable probe for the selective determination of Fe3+ in real water samples.

Effect of the surface chemistry on the photoluminescence properties of boron doped carbon dots

2021 ◽  
Vol 405 ◽  
pp. 112903
Author(s):  
Lucie Largitte ◽  
Nikolina A Travlou ◽  
Marc Florent ◽  
Jeff Secor ◽  
Teresa J. Bandosz
Keyword(s):  
Surface Chemistry ◽  
Carbon Dots ◽  
Photoluminescence Properties ◽  
Boron Doped ◽  
Doped Carbon Dots
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