Green emitting N, P-doped carbon dots as efficient fluorescent nanoprobes for determination of Cr(VI) in water and soil samples

Tall, Amidou; Cunha, Francisco Antônio da Silva; Boukaré, Kaboré; Barbosa, Cintya d'Angeles do E. S.; Rocha, Uéslen; Sales, Tasso O.; Goulart, Marília Oliveira Fonseca; Tapsoba, Issa; Santos, Josué Carinhanha Caldas

doi:10.1016/j.microc.2021.106219

Cited by 33 publications

(15 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is observed that a small absorption maximum is located at 240 nm, which is usually ascribed to the π-π * transition of the sp 2 -hybridized carbon atoms of the carbon dot moiety [29]. Additionally, a relatively stronger absorbance has been achieved at 342 nm, suggesting the n-π* transition related to the surface defects of the carbon dots in C-N bonds in sp 3 hybridizations sourcing from the amine (-NH 2 ) groups from surface functionalisation [ 9,30,31]. The broad absorbance bands centred between 450 and 572 nm is sourced from the Fe-Fe transitions.…”

Section: Optical Properties Of the Synthesized Samplementioning

confidence: 98%

“…It has been seen that Cr (VI) exposure to Swiss mice causes sharp decrease in leucocyte and erythrocyte with an additional deforming of echinocyte formation from erythrocytes [7]. Cr (VI) has been recognised as group-1 carcinogen by World Health Organization (WHO) as it can disrupt DNA via reactive oxygen species (ROS) generation, a maximum limit of 50 µgL − 1 has been set by WHO [8,9].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Biocompatible carbon dot decorated α-FeOOH nanohybrid for an effective fluorometric sensing of Cr (VI) in wastewater and living cells

Ghosh

Roy

Bardhan

et al. 2022

Preprint

View full text Add to dashboard Cite

This article reports the fluorometric detection of toxic hexavalent chromium Cr (VI)) in wastewater and Cr (VI) contaminated living cells using in-situ grown carbon quantum dots into the goethite (α-FeOOH) nano-matrix. The synthesized nano-hybrid shows enormous potential in determining the chromium contamination levels in various types of water samples. This selective fluorometric probe is enormously sensitive (LOD 81nM) towards hexavalent chromium, which makes it a dedicated chromium sensor. Moreover, the sensing mechanism has been assessed using Stern-Volmer’s equation and fluorescence lifetime experiments showing the simultaneous occurrence of photoinduced electron transfer and inner filter effect. This chromium sensor has also been employed to assess the contamination level in real-life industrial wastewater. The performance of this probe in real-life wastewater sample is quite commendable. Further, this biocompatible fluorometric probe has been used to demonstrate the in-vitro sensing of Cr (VI) in HeLa cells. The rapid detection mechanism of hexavalent chromium in living cells has been validated using theoretical docking simulations. Henceforth, this fluorometric sensor material could open new avenues not only in wastewater monitoring but also in biomedical applications.

show abstract

Section: Optical Properties Of the Synthesized Samplementioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Biocompatible carbon dot decorated α-FeOOH nanohybrid for an effective fluorometric sensing of Cr (VI) in wastewater and living cells

Ghosh

Roy

Bardhan

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…It indicated the FL quenching mechanism of N,S-CDs towards Cr(VI) was referred to the inner lter effect (IFE), which occurred between the uorophore and absorber due to the absorption of the emission and/or excitation light of the uorophore by the absorbers in detection system. 50,51 In addition, the UV-vis absorbance spectrum of N,S-CDs/Cr(VI) at different concentration of AA were recorded to research the mechanism of N,S-CDs/Cr(VI) towards AA. As shown in Fig.…”

Section: Detection Of Aamentioning

confidence: 99%

Fluorescent “on–off–on” sensor based on N,S co-doped carbon dots from seaweed (Sargassum carpophyllum) for specific detection of Cr(vi) and ascorbic acid

Tian

et al. 2021

RSC Adv.

View full text Add to dashboard Cite

show abstract

“…The sensors are divided into inorganic (heavy metal sensing [ 13 ]) and organic (for pesticides [ 14 ], herbicides [ 15 ], medical drugs [ 16 ], proteins [ 17 ], vitamins [ 18 ]) sensors. Very variable environment with pollutants, e.g., potable water [ 19 ], tap water [ 20 ], real water sample [ 21 ], food products [ 22 ] and soil [ 23 ], were also tested.…”

Section: Introductionmentioning

confidence: 99%

Cyan Fluorescent Carbon Quantum Dots with Amino Derivatives for the Visual Detection of Copper (II) Cations in Sea Water

et al. 2023

View full text Add to dashboard Cite

Amino- and carboxyl-functionalized carbon quantum dots (Amino-CQDs) were synthesized through fast and simple microwave treatment of a citric acid, ethylenediamine and ethylenediaminetetraacetic acid (EDTA) mix. The reproducible and stable optical properties from newly synthesized CQD dispersion with a maximum absorbance spectra at 330 nm and the symmetric emission maximum at 470 nm made the Amino-CQDs a promising fluorescence material for analytical applications. The highly aminated and chelate moieties on the CQDs was appropriate for a copper (Cu2+) cation sensor in the linear range from 1 × 10−4 mg/mL to 10 mg/mL with a limit of detection at 0.00036 mg/mL by static fluorescence quenching effects. Furthermore, Amino-CQDs demonstrated stable fluorescence parameters for assays in diluted alkali metal solution (Na+ and K+) and sea water. Finally, a visual sensor, based on Amino-CQDs, was successfully created for the 0.01–100 mg/mL range to produce a colorimetric effect that can be registered by computer vision software (Open CV Python).

show abstract

Green emitting N, P-doped carbon dots as efficient fluorescent nanoprobes for determination of Cr(VI) in water and soil samples

Cited by 33 publications

References 60 publications

Biocompatible carbon dot decorated α-FeOOH nanohybrid for an effective fluorometric sensing of Cr (VI) in wastewater and living cells

Biocompatible carbon dot decorated α-FeOOH nanohybrid for an effective fluorometric sensing of Cr (VI) in wastewater and living cells

Fluorescent “on–off–on” sensor based on N,S co-doped carbon dots from seaweed (Sargassum carpophyllum) for specific detection of Cr(vi) and ascorbic acid

Cyan Fluorescent Carbon Quantum Dots with Amino Derivatives for the Visual Detection of Copper (II) Cations in Sea Water

Contact Info

Product

Resources

About