Carbon-dot-based dual-emission silica nanoparticles as a ratiometric fluorescent probe for vanadium(V) detection in mineral water samples

A simple and effective strategy for designing a fluorescent probe for bromate was described in this work. Organosilane modified carbon dots were prepared by pyrolysis of citric acid in N-(β-aminoethyl)-γ-aminopropyl methyldimethoxysilane solvent at 230 °C and further doped onto silica nanoparticles by a silylation reaction. The fluorescence of carbon dot doped silica nanoparticles was quenched by bromate in acidic medium. By utilizing this property, the nanoparticle could be used as a sensor to detect bromate. The parameters affecting the performance of the sensor probe such as types of acid medium, acid concentration, reaction temperature, and time were investigated and optimized. The detection limit of the sensor was found to be 1.1 ng mL−1, with a linear range from 8 to 400 ng mL−1 and relative standard deviation of 2.0% (150 ng mL−1, n = 9). The method was successfully applied to the determination of bromate in drinking water samples, and the recoveries were in the range of 96.3%–103.7%.

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Carbon dots based dual-emission silica nanoparticles as ratiometric fluorescent probe for chromium speciation analysis in water samples

Canadian Journal of Chemistry ◽

10.1139/cjc-2017-0472 ◽

2018 ◽

Vol 96 (1) ◽

pp. 72-77 ◽

Cited By ~ 7

Author(s):

Guoqiang Xiang ◽

Yue Ren ◽

Heng Zhang ◽

Huanhuan Fan ◽

Xiuming Jiang ◽

...

Keyword(s):

Silica Nanoparticles ◽

Water Samples ◽

Carbon Dots ◽

Speciation Analysis ◽

Chromium Speciation ◽

Ratiometric Fluorescence ◽

Dual Emission ◽

Acid Type ◽

Optimized Conditions ◽

Ratiometric Fluorescent Probe

A simple and effective strategy for designing a ratiometric fluorescent nanosensor was described. A carbon dots (CDs) based dual-emission nanosensor for chromium speciation analysis was developed by coating CDs on the surface of dye-doped silica nanoparticles. The fluorescence of the resulting dual-emission silica nanoparticles was quenched in acetic acid through potassium bromate (KBrO3) oxidation. Cr(VI) was able to catalyze KBrO3 oxidation, resulting in ratiometric fluorescence accelerated quenching response of the dual-emission silica nanoparticles. Several important parameters affecting the nanosensor performance, including acid type, concentrations of KBrO3, and reaction temperature and time were examined. Under the optimized conditions, the detection limit of the nanosensor towards Cr(VI) reached 1.3 ng mL−1, and pretty good linearity was obtained between 20 to 500 ng mL−1. More importantly, the sensor was found suitable for speciation analysis of both Cr(III) and Cr(VI) in different water samples with satisfactory results.

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Efficient fluorescence resonance energy transfer-based ratiometric fluorescent probe for detection of dopamine using a dual-emission carbon dot-gold nanocluster nanohybrid

Journal of Photochemistry and Photobiology A Chemistry ◽

10.1016/j.jphotochem.2021.113195 ◽

2021 ◽

Vol 411 ◽

pp. 113195

Author(s):

Yuanyuan Zhang ◽

Hedan Xu ◽

Yuling Yang ◽

Fengmei Zhu ◽

Yunxun Pu ◽

...

Keyword(s):

Energy Transfer ◽

Fluorescent Probe ◽

Fluorescence Resonance Energy Transfer ◽

Resonance Energy Transfer ◽

Resonance Energy ◽

Gold Nanocluster ◽

Dual Emission ◽

Carbon Dot ◽

Fluorescence Resonance ◽

Ratiometric Fluorescent Probe

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An efficient ratiometric fluorescent probe based on dual-emission fluorescent silica nanoparticles for visual determination of Hg2+

Analytical Methods ◽

10.1039/c4ay02905d ◽

2015 ◽

Vol 7 (6) ◽

pp. 2295-2299 ◽

Cited By ~ 11

Author(s):

Jing Wang ◽

Meng Ma ◽

Rongbin Huang ◽

Ligeng Wang ◽

Aimin Chen ◽

...

Keyword(s):

Silica Nanoparticles ◽

Fluorescent Probe ◽

Visual Detection ◽

Fluorescein Isothiocyanate ◽

Dual Emission ◽

Fluorescent Silica Nanoparticles ◽

Ratiometric Fluorescent Probe

CdTe/CdS QD-tagged fluorescein isothiocyanate-doped silica nanoparticles were designed as a ratiometric fluorescent probe for visual detection of Hg2+.

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