scholarly journals A Highly Sensitive and Selective Probe for the Colorimetric Detection of Mn(II) Based on the Antioxidative Selenium and Nitrogen Co-Doped Carbon Quantum Dots and ABTS•+

2021 ◽  
Vol 9 ◽  
Author(s):  
Qinhai Xu ◽  
Xiaolin Liu ◽  
Yanglin Jiang ◽  
Peng Wang
Keyword(s):  
Quantum Dots ◽  
Citric Acid ◽  
Detection Limit ◽  
Sodium Selenite ◽  
Tap Water ◽  
Colorimetric Detection ◽  
Carbon Quantum Dots ◽  
Promising Tool ◽  
Highly Sensitive ◽  
Co Doped

Herein, selenium and nitrogen co-doped carbon quantum dots (Se/N-CQDs) were hydrothermally synthesized by using citric acid, histidine, and sodium selenite, which had sp3 and sp2 hybridized carbon atoms and showed excitation-dependent fluorescence behavior. Furthermore, due to the redox reaction of ABTS•+ and Se/N-CQDs, Se/N-CQDs had the excellent antioxidant capacity that it was demonstrated by scavenging ABTS•+ with the fading of blue. Based on the synergistic effect of Se/N-CQDs and Mn(II) on ABTS•+, Se/N-CQDs and ABTS•+, as a stable, sensitive, selective, and reproducible colorimetric sensor, was applied to the detection of Mn(II) with a detection limit of 1.69 μM and a linear range of 0 to 142.90 μM. More importantly, the probe was successfully applied to detecting Mn(II) in tap water, illustrating that it could be a promising tool for Mn(II) detection in water environments.

Nitrogen-doped carbon dot mediated fluorescence on–off assay for highly sensitive detection of I− and Br− ions

2018 ◽  
Vol 42 (17) ◽  
pp. 14332-14339 ◽  
Author(s):  
Nan Zhou ◽  
Xingwei Zhang ◽  
Yanping Shi ◽  
Zeliang Li ◽  
Zhibiao Feng
Keyword(s):  
Quantum Dots ◽  
Citric Acid ◽  
Carbon Source ◽  
Nitrogen Source ◽  
Carbon Quantum Dots ◽  
Sensitive Detection ◽  
Nitrogen Doped ◽  
Highly Sensitive ◽  
Highly Sensitive Detection ◽  
Nitrogen Doped Carbon

Nitrogen-doped carbon quantum dots (CDs) were synthesized in ethanol media by using citric acid (CA) as the carbon source and ethanediamine (EDA) as the nitrogen source.

An “on–off–on” fluorescent nanoprobe for recognition of Cu2+ and GSH based on nitrogen co-doped carbon quantum dots, and its logic gate operation

2019 ◽  
Vol 11 (20) ◽  
pp. 2650-2657 ◽  
Author(s):  
Yifang Gao ◽  
Huilin Zhang ◽  
Shaomin Shuang ◽  
Hui Han ◽  
Chuan Dong
Keyword(s):  
Quantum Dots ◽  
Carbon Dots ◽  
Logic Gate ◽  
Carbon Quantum Dots ◽  
Gate Operation ◽  
Fluorescent Nanoprobe ◽  
Highly Sensitive ◽  
Doped Carbon Dots ◽  
Co Doped

Novel nitrogen co-doped carbon dots (NCDs) were synthesized as a fluorescent “on–off–on” switch for the highly sensitive and selective sensing of Cu2+ and glutathione (GSH) by a straightforward pyrolysis route.

Cuttlefish ink-based N and S co-doped carbon quantum dots as fluorescent sensor for highly sensitive and selective para-nitrophenol detection

2021 ◽  
Author(s):  
Xiaotong Huang ◽  
Chunli Yang ◽  
Yingxin Chen ◽  
Zebin Zhu ◽  
Lihua Zhou
Keyword(s):  
Quantum Dots ◽  
Organic Synthesis ◽  
Fluorescent Sensor ◽  
Environmental Problems ◽  
Carbon Quantum Dots ◽  
Raw Material ◽  
Highly Sensitive ◽  
Co Doped

Para-nitrophenol (PNP) is an important raw material for organic synthesis and its extensive use has produced a series of environmental problems. Here, we develop a highly sensitive and selective fluorescent...

Preparation of N-doped carbon quantum dots for highly sensitive detection of dopamine by an electrochemical method

RSC Advances ◽  
2015 ◽  
Vol 5 (12) ◽  
pp. 9064-9068 ◽  
Author(s):  
Guohua Jiang ◽  
Tengteng Jiang ◽  
Huijie Zhou ◽  
Juming Yao ◽  
Xiangdong Kong
Keyword(s):  
Quantum Dots ◽  
Detection Limit ◽  
Electrochemical Method ◽  
Carbon Quantum Dots ◽  
Sensitive Detection ◽  
Carbon Electrode ◽  
Glass Carbon Electrode ◽  
Highly Sensitive ◽  
Glass Carbon ◽  
Highly Sensitive Detection

The glass carbon electrode modified by N-doped carbon quantum dots (NCQD) (NCQD/GCE) has been used to detect dopamine (DA) with broad linear range and low detection limit.

scholarly journals Highly photoluminescent and temperature-sensitive P, N, B-co-doped carbon quantum dots and their highly sensitive recognition for curcumin

RSC Advances ◽  
2019 ◽  
Vol 9 (15) ◽  
pp. 8340-8349 ◽  
Author(s):  
Bin Wu ◽  
Xiaolong Liu ◽  
Xiaofeng Shi ◽  
Wei Han ◽  
Chunru Wang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Carbon Quantum Dots ◽  
Good Stability ◽  
Sensitive Detection ◽  
Temperature Sensitive ◽  
Strong Fluorescence ◽  
One Pot ◽  
Highly Sensitive ◽  
Co Doped

Temperature-sensitive P, N, B-co-doped carbon quantum dots (PNBCDs) synthesized using one-pot method exhibit many excellent features, such as strong fluorescence, good stability and sensitive detection for curcumin.

One-Step Synthesis of Nitrogen and Chlorine Co-Doped Carbon Quantum Dots for Detection of Fe3+

NANO ◽  
2017 ◽  
Vol 12 (11) ◽  
pp. 1750135 ◽  
Author(s):  
Yin Zhong ◽  
Qi Chen ◽  
Junjian Li ◽  
Xihao Pan ◽  
Zhiwei Han ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Detection Limit ◽  
High Selectivity ◽  
Carbon Quantum Dots ◽  
High Quantum Yield ◽  
Environment Friendly ◽  
Glucosamine Hydrochloride ◽  
Quenching Efficiency ◽  
One Step ◽  
Co Doped

An environment friendly, economic and maneuverable hydrothermal method was proposed for fabrication of nitrogen and chlorine co-doped carbon quantum dots (N,Cl-CQDs). D-Glucosamine hydrochloride as the only precursor offered source of carbon, nitrogen and chlorine. As a consequent N,Cl-CQDs can emit blue luminescence and detect Fe[Formula: see text] by fluorescence response with high selectivity and sensitivity. There is a linear semilogarithmic correlation between the quenching efficiency [Formula: see text] and the concentration of Fe[Formula: see text] with a detection limit of 0.167 [Formula: see text]M. The N,Cl-CQDs exhibit a high quantum yield of 16.8% along with the fluorescence lifetime of 2.2[Formula: see text]ns. It is worth noting that the prepared N,Cl-CQDs show excellent biocompatibility and they are promising materials for sensing and biology.

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