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

2018 ◽  
Vol 96 (1) ◽  
pp. 72-77 ◽  
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.

scholarly journals Noval Dual-Emission Fluorescence Carbon Dots as a Ratiometric Probe for Cu2+ and ClO− Detection

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1232
Author(s):  
Jiaqing Guo ◽  
Aikun Liu ◽  
Yutian Zeng ◽  
Haojie Cai ◽  
Shuai Ye ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Background Noise ◽  
Good Recovery ◽  
Ratiometric Fluorescence ◽  
Dual Emission ◽  
Simple Method ◽  
Real Samples ◽  
Nitrogen Doped ◽  
Probe Concentration ◽  
Ratiometric Probe

The use of carbon dots (CDs) with dual emission based on ratiometric fluorescence has been attracting attention in recent times for more accurate ion detection since they help avoid interference from background noise, probe concentration, and complexity. Herein, novel dual-emission nitrogen-doped CDs (NCDs) were prepared by a simple method for Cu2+ and ClO- detection. The NCDs showed excellent anti-interference ability and selectivity for different emissions. In addition, a good linear relationship was observed between the fluorescence intensity (FI) of the NCD solutions in different emissions with Cu2+ (0–90 μM) and ClO- (0–75 μM). The limits of both Cu2+ detection and ClO- were very low, at 17.7 and 11.6 nM, respectively. The NCDs developed herein also showed a good recovery rate in water for Cu2+ and ClO− detection. Hence, they are expected to have a more extensive application prospect in real samples.

Carbon Dots Based Dual-Emission Silica Nanoparticles as a Ratiometric Nanosensor for Cu2+

2014 ◽  
Vol 86 (5) ◽  
pp. 2289-2296 ◽  
Author(s):  
Xiangjun Liu ◽  
Nan Zhang ◽  
Tao Bing ◽  
Dihua Shangguan
Keyword(s):  
Silica Nanoparticles ◽  
Carbon Dots ◽  
Dual Emission

Visual and ratiometric fluorescence detection of Hg2+ based on a dual-emission carbon dots-gold nanoclusters nanohybrid

2018 ◽  
Vol 259 ◽  
pp. 1082-1089 ◽  
Author(s):  
Huizhi Xie ◽  
Jing Dong ◽  
Junling Duan ◽  
Geoffrey I.N. Waterhouse ◽  
Juying Hou ◽  
...  
Keyword(s):  
Fluorescence Detection ◽  
Carbon Dots ◽  
Gold Nanoclusters ◽  
Ratiometric Fluorescence ◽  
Dual Emission

scholarly journals Ratiometric fluorescence probe of Cu2+ and biothiols by using carbon dots and copper nanoclusters

RSC Advances ◽  
2021 ◽  
Vol 11 (53) ◽  
pp. 33662-33674
Author(s):  
Ning Zhao ◽  
Jianqiang Song ◽  
Zheng Huang ◽  
Xiuying Yang ◽  
Yousheng Wang ◽  
...  
Keyword(s):  
Simultaneous Determination ◽  
Fluorescent Probe ◽  
Carbon Dots ◽  
Fluorescence Probe ◽  
Ratiometric Fluorescence ◽  
Copper Nanoclusters ◽  
Dual Mechanism ◽  
Fluorescent Carbon Dots ◽  
Ratiometric Fluorescent Probe

A dual-mechanism ratiometric fluorescent probe based on N-doped yellow fluorescent carbon dots (y-CDs) and blue fluorescent copper nanoclusters (CuNCs) was established for the first simultaneous determination of Cu2+ and biothiols.

Facile synthesis of red dual-emissive carbon dots for ratiometric fluorescence sensing and cellular imaging

Nanoscale ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 5494-5500 ◽  
Author(s):  
Yang Hu ◽  
Zhengbiao Yang ◽  
Xuan Lu ◽  
Jiazhuang Guo ◽  
Rui Cheng ◽  
...  
Keyword(s):  
Hydrothermal Treatment ◽  
Carbon Dots ◽  
Cellular Imaging ◽  
Ratiometric Fluorescence ◽  
Fluorescence Sensing ◽  
Facile Synthesis ◽  
Dual Emission ◽  
Ratiometric Fluorescence Sensing

Carbon dots synthesized by the hydrothermal treatment of dicyandiamide and o-phenylenediamine in dilute H2SO4 exhibit efficient excitation-independent red dual-emission useful for ratiometric fluorescence sensing and cellular imaging.

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