Ratiometric fluorescent sensor for visual determination of copper ions and alkaline phosphatase based on carbon quantum dots and gold nanoclusters

2019 ◽  
Vol 411 (12) ◽  
pp. 2531-2543 ◽  
Author(s):  
Haijian Liu ◽  
Lu Jia ◽  
Yixuan Wang ◽  
Mengyao Wang ◽  
Zideng Gao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Alkaline Phosphatase ◽  
Copper Ions ◽  
Fluorescent Sensor ◽  
Gold Nanoclusters ◽  
Carbon Quantum Dots ◽  
Determination Of Copper

Ratiometric fluorescent paper sensor utilizing hybrid carbon dots–quantum dots for the visual determination of copper ions

Nanoscale ◽  
2016 ◽  
Vol 8 (11) ◽  
pp. 5977-5984 ◽  
Author(s):  
Yahui Wang ◽  
Cheng Zhang ◽  
Xiaochun Chen ◽  
Bo Yang ◽  
Liang Yang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Carbon Dots ◽  
Copper Ions ◽  
Paper Sensor ◽  
Hybrid Carbon ◽  
Determination Of Copper

scholarly journals Ion-Imprinted Polymer Modified with Carbon Quantum Dots as a Highly Sensitive Copper(II) Ion Probe

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1376
Author(s):  
Zhiming Wang ◽  
Cuo Zhou ◽  
Shunwei Wu ◽  
Chunyan Sun
Keyword(s):  
Quantum Dots ◽  
Copper Ions ◽  
Fluorescent Sensor ◽  
Hydrothermal Process ◽  
Copper Ion ◽  
Fluorescence Analysis ◽  
Carbon Quantum Dots ◽  
General Strategy ◽  
Surface Imprinting Technique ◽  
Ion Imprinted

Fluorescence analysis technology and ion imprinting technology are combined to prepare a copper ion fluorescence sensor. Carbon quantum dots (CQDs), with a quantum yield of 79%, were synthesized by a hydrothermal process using citric acid as the carbon source. The prepared CQDs, acting as the fluorophore, were grafted onto the surface of an SBA-15 mesoporous molecular sieve by an amidation reaction. Then, the fluorescent sensor CQDs@Cu-IIP was prepared using a surface imprinting technique with the modified SBA-15 as the substrate, copper ions as a template, tetraethoxysilane as the crosslinker, and 3-aminopropyl-3-ethoxysilane as the functional monomers. The sensor showed strong fluorescence from CQDs and high selectivity due to the presence of Cu(II)-IIP. After the detection conditions were optimized, the fluorescence intensity of the sensor had good linearity with Cu(II) concentration in a linear range of 0.25–2 mg/L and 3–10 mg/L. This CQDs@Cu-IIP was applied to the determination of traces Cu(II) in real water samples and good recoveries of 99.29–105.42% were obtained. The present study provides a general strategy for fabricating materials based on CQDs for selective fluorescence detection of heavy metals.

scholarly journals A Novel Surfactant Sensitized Fluorescent Sensor for Co(II) Based on Nitrogen Doped Carbon Quantum Dots

2021 ◽  
Author(s):  
Ouwen Xu ◽  
Wei Liu ◽  
Jiawei Li ◽  
Shuyu Wan ◽  
Xiashi Zhu
Keyword(s):  
Quantum Dots ◽  
Fluorescence Quenching ◽  
Limit Of Detection ◽  
Fluorescent Sensor ◽  
Sodium Dodecyl ◽  
Carbon Quantum Dots ◽  
Quenching Effect ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon

AbstractA novel nitrogen-doped carbon quantum dots (N-CDs) were prepared by the microwave irradiation method. The fluorescence quenching effect of Co(II) on the N-CDs was studied in the sodium dodecyl sulfate (SDS) medium and the fluorescence quenching was sensitized in the SDS. The linear range of calibration curve for the determination of Co(II) was 0.17µg/mL-11.8µg/mL and the limit of detection was 0.052µg/mL. The method has been applied for the determination of Co(II) in samples with satisfactory results.

Efficient Ratiometric Fluorescence Probe Based on Dual-Emission Quantum Dots Hybrid for On-Site Determination of Copper Ions

2013 ◽  
Vol 85 (13) ◽  
pp. 6461-6468 ◽  
Author(s):  
Jianlei Yao ◽  
Kui Zhang ◽  
Houjuan Zhu ◽  
Fang Ma ◽  
Mingtai Sun ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Fluorescence Probe ◽  
Copper Ions ◽  
Ratiometric Fluorescence ◽  
Dual Emission ◽  
Determination Of Copper
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