Nitrogen and sulfur co-doped carbon dots synthesis via one step hydrothermal carbonization of green alga and their multifunctional applications

2019 ◽  
Vol 147 ◽  
pp. 1038-1047 ◽  
Author(s):  
Yuehai Li ◽  
Fengjiao Liu ◽  
Jiabai Cai ◽  
Xuguang Huang ◽  
Luxiu Lin ◽  
...  
Keyword(s):  
Green Alga ◽  
Carbon Dots ◽  
Hydrothermal Carbonization ◽  
One Step ◽  
Doped Carbon Dots ◽  
Co Doped

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.

Highly sensitive fluorescent carbon dots probe with ratiometric emission for the determination of ClO−

The Analyst ◽  
2020 ◽  
Vol 145 (6) ◽  
pp. 2212-2218 ◽  
Author(s):  
Huilin Zhang ◽  
Yifang Gao ◽  
Yuan Jiao ◽  
Wenjing Lu ◽  
Shaomin Shuang ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Carbon Dots ◽  
Highly Sensitive ◽  
One Step ◽  
Doped Carbon Dots ◽  
Fluorescent Carbon Dots ◽  
Co Doped ◽  
Fluorescent Carbon

A ratiometric fluorescent N,S co-doped carbon dots (N,S-CD) probe for ClO− has been facilely obtained via a one-step hydrothermal method.

One-step synthesis of S,B co-doped carbon dots and their application for selective and sensitive fluorescence detection of diethylstilbestrol

2018 ◽  
Vol 42 (4) ◽  
pp. 2857-2864 ◽  
Author(s):  
Chunxi Zhao ◽  
Yang Jiao ◽  
Lei Zhang ◽  
Yaling Yang
Keyword(s):  
Fluorescence Detection ◽  
Carbon Dots ◽  
One Step ◽  
Doped Carbon Dots ◽  
Co Doped

S,B co-doped carbon dots were synthesized, and their application in the detection of diethylstilbestrol.

Multifunctional Biomedical Applications of Nitrogen and Sulfur Co-Doped Carbon Dots

2021 ◽  
Vol 17 (8) ◽  
pp. 1598-1611
Author(s):  
Dan Zhao ◽  
Rui Zhang ◽  
Mengyu Xu ◽  
Xincai Xiao ◽  
Haiyan Zhao ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Biomedical Application ◽  
Carbon Sources ◽  
Sulfur Source ◽  
Gram Positive ◽  
Gram Positive Bacteria ◽  
One Step ◽  
Onion Epidermal Cells ◽  
Doped Carbon Dots ◽  
Co Doped

Multifunctional carbon dots have drawn considerable attention due to their potential biomedical application value. We report the preparation of blue-green fluorescence-emitting, multifunctional, nitrogen-and-sulfur co-doped carbon dots (N, S-CDs) synthesized via a one-step process using 1-thioglycerol as a sulfur source, glucose and citric acid as carbon sources, and polyethyleneimine as a nitrogen source. Because of abundant amino and sulfur content, the CDs exhibited high sensibility and selectivity for detecting Cu2+ (detection limit: 0.01 μM, linear range: 0.025 to 50 μM). Fast and sensitive detection of tiopronin was also achieved on the basis of the fluorescence “off-on” mode considering the strong affinity between tiopronin and Cu2+. The N, S-CDs exhibited good biocompatibility as determined by fluorescence imaging using onion epidermal cells and gram-positive bacteria. The CDs also exhibited excellent antimicrobial ability against the gram-positive bacteria. Our results indicate that these novel N, S-CDs could be ideal candidates for several biochemical applications such as antibacterial treatment and detection of small biomolecules.

Simple and Green Synthesis of Boron-, Sulfur-, and Nitrogen-Co-Doped Carbon Dots as Fluorescent Probe for Selective and Sensitive Detection of Sunset Yellow

NANO ◽  
2017 ◽  
Vol 12 (10) ◽  
pp. 1750123 ◽  
Author(s):  
Ying Huang ◽  
Zhengjun Cheng
Keyword(s):  
Carbon Dots ◽  
Sensitive Detection ◽  
Sunset Yellow ◽  
Transmission Electron ◽  
One Step ◽  
Water Dispersibility ◽  
Doped Carbon Dots ◽  
Electron Microscope Image ◽  
Bright Blue ◽  
Co Doped

Herein, we have reported the synthesis of boron-, sulfur-, and nitrogen-co-doped carbon dots (B/S/N-CDs) by one-step hydrothermal method using D-([Formula: see text])-maltose monohydrate, boracic acid, and thiocarbamide as the precursors. The prepared B/S/N-CDs possess good water dispersibility, excellent pH stabilities, and resistance to photobleaching. Furthermore, the transmission electron microscope image indicates that the B/S/N-CDs are homogeneously spherical and show good dispersion. Noticeably, the B/S/N-CDs show bright blue photoluminescence with a quantum yield of 8.9% in aqueous solution and can be used as a potent photoluminescent probe for selective and sensitive detection of sunset yellow (SY). Compared with other food colors, SY can dramatically quench the fluorescence of B/S/N-CDs. Meanwhile, the fluorescence intensity displays a good linear response with SY concentration in the range of 0–70[Formula: see text][Formula: see text]M ([Formula: see text]) and the detection limit is as low as 4.65[Formula: see text]nM. The B/S/N-CDs can also be applied for the detection of SY in mineral water and business drink with satisfactory recovery. Our study has demonstrated that the B/S/N-CDs may have wide application values in medical detection, environmental monitoring, and related researches.

A hydrothermal route for synthesizing highly luminescent sulfur- and nitrogen-co-doped carbon dots as nanosensors for Hg2+

RSC Advances ◽  
2016 ◽  
Vol 6 (89) ◽  
pp. 86436-86442 ◽  
Author(s):  
Chunfeng Wang ◽  
Dong Sun ◽  
Yujuan Chen ◽  
Kelei Zhuo
Keyword(s):  
Graphene Oxide ◽  
Fluorescent Probe ◽  
Hydrothermal Treatment ◽  
Carbon Dots ◽  
Hydrothermal Route ◽  
One Step ◽  
The One ◽  
Doped Carbon Dots ◽  
Co Doped

Sulfur- and nitrogen-co-doped carbon dots were synthesized by the one step hydrothermal treatment of pyritinol hydrochloride in the presence of graphene oxide, and could be used as an effective fluorescent probe for the detection of Hg2+.

Nitrogen and Sulfur Co-doped Fluorescent Carbon Dots for the Detection of Morin and Cell Imaging

2018 ◽  
Vol 15 (1) ◽  
pp. 47-55
Author(s):  
Xuebing Li ◽  
Haifen Yang ◽  
Ning Wang ◽  
Tijian Sun ◽  
Wei Bian ◽  
...  
Keyword(s):  
Microwave Heating ◽  
Fluorescent Probe ◽  
Fluorescence Intensity ◽  
Carbon Dots ◽  
Cell Imaging ◽  
Water Soluble ◽  
Heating Process ◽  
X Ray ◽  
Doped Carbon Dots ◽  
Co Doped

Background: Morin has many pharmacological functions including antioxidant, anticancer, anti-inflammatory, and antibacterial effects. It is commonly used in the treatment of antiviral infection, gastropathy, coronary heart disease and hepatitis B in clinic. However, researches have shown that morin is likely to show prooxidative effects on the cells when the amount of treatment is at high dose, leading to the decrease of intracellular ATP levels and the increase of necrosis process. Therefore, it is necessary to determine the concentration of morin in biologic samples. Method: Novel water-soluble and green nitrogen and sulfur co-doped carbon dots (NSCDs) were prepared by a microwave heating process with citric acid and L-cysteine. The fluorescence spectra were collected at an excitation wavelength of 350 nm when solutions of NSCDs were mixed with various concentrations of morin. Results: The as-prepared NSCDs were characterized by transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The fluorescence intensity of NSCDs decreased significantly with the increase of morin concentration. The fluorescence intensity of NSCDs displayed a linear response to morin in the concentration 0.10-30 μM with a low detection limit of 56 nM. The proposed fluorescent probe was applied to analysis of morin in human body fluids with recoveries of 98.0-102%. Conclusion: NSCDs were prepared by a microwave heating process. The present analytical method is sensitive to morin. The quenching process between NSCDs and morin is attributed to the static quenching. In addition, the cellular toxicity on HeLa cells indicated that the as-prepared NSCDs fluorescent probe does not show obvious cytotoxicity in cell imaging. Our proposed method possibly opens up a rapid and nontoxic way for preparing heteroatom doped carbon dots with a broad application prospect.

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