Inhibition of rhodamine B–ferricyanide chemiluminescence by Au nanoparticles toward the sensitive determination of mercury (II) ions

Vahid, Behrouz; Abolhasani, Jafar; Khodakarami, Behzad

doi:10.1016/j.microc.2015.12.028

Cited by 15 publications

(4 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The catalytic capacity of WS 2 QDs was discriminated by its incremental effect on CL intensity ( Figure 5 ). The oxidation reaction of RB could generate oxidized RB molecules in an electronically excited state [ • RB − ]* ox and RB* which could emit at λ ≈ 425 nm [ 49 , 50 ] and λ ≈ 575 nm [ 51 , 52 ], respectively. As reported in previous research [ 51 , 52 ], [RB]* ox is the most oxidized form that is produced in alkaline environment.…”

Section: Resultsmentioning

confidence: 99%

“…The oxidation reaction of RB could generate oxidized RB molecules in an electronically excited state [ • RB − ]* ox and RB* which could emit at λ ≈ 425 nm [ 49 , 50 ] and λ ≈ 575 nm [ 51 , 52 ], respectively. As reported in previous research [ 51 , 52 ], [RB]* ox is the most oxidized form that is produced in alkaline environment. In addition, there is an efficient energy transfer between RB molecules and the [RB]* ox species via external plasmon process, which generates RB * as emitters [ 53 ].…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

A Chemiluminescent Method for the Detection of H2O2 and Glucose Based on Intrinsic Peroxidase-Like Activity of WS2 Quantum Dots

et al. 2019

Self Cite

View full text Add to dashboard Cite

Currently, researchers are looking for nanomaterials with peroxidase-like activity to replace natural peroxidase enzymes. For this purpose, WS2 quantum dots (WS2 QDs) were synthesized via a solvothermal method, which improved the mimetic behavior. The resulting WS2 QDs with a size of 1–1.5 nm had a high fluorescence emission, dependent on the excitation wavelength. WS2 QDs with uniform morphology showed a high catalytic effect in destroying H2O2. The peroxidase-like activity of synthesized nanostructures was studied in H2O2 chemical and electrochemical reduction systems. The mimetic effect of WS2 QDs was also shown in an H2O2–rhodamine B (RB) chemiluminescence system. For this aim, a stopped-flow chemiluminescence (CL) detection system was applied. Also, in order to confirm the peroxidase-like effect of quantum dots, colorimetry and electrochemical techniques were used. In the enzymatic reaction of glucose, H2O2 is one of the products which can be determined. Under optimum conditions, H2O2 can be detected in the concentration range of 0–1000 nmol·L−1, with a detection limit of 2.4 nmol·L−1. Using this CL assay, a linear relationship was obtained between the intensity of the CL emission and glucose concentration in the range of 0.01–30 nmol·L−1, with a limit of detection (3S) of 4.2 nmol·L−1.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

A Chemiluminescent Method for the Detection of H2O2 and Glucose Based on Intrinsic Peroxidase-Like Activity of WS2 Quantum Dots

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…Alternatively, several CL sensing methods were developed based on the inherent affinity of gold nanoparticles for Hg 2+ . [26][27][28] For example, the Cui group prepared luminol-capped gold nanoparticles and established a CL sensor for sensitive and selective detection of Hg 2+ . 26 Monolayer transition metal dichalcogenides (TMDC) have been attracting growing attention since the discovery of their direct bandgap.…”

Section: Introductionmentioning

confidence: 99%

Sensitive Chemiluminescent Sensing Method for Mercury(II) Ions Based on Monolayer Molybdenum Disulfide

et al. 2019

View full text Add to dashboard Cite

A simple and sensitive chemiluminescent (CL) sensing platform for mercury(II) ions (Hg 2+) in water was developed based on monolayer molybdenum disulfide (MoS2). The layered MoS2 can catalyze the oxidation of luminol by H2O2, producing an enhanced CL signal because of the peroxidase-like activity of the layered MoS2. In addition, MoS2 has a good adsorption ability to Hg 2+ because of the inherent affinity of Hg 2+ to sulfur contained in MoS2. Interestingly, the pre-incubation of Hg 2+ with layered MoS2 inhibited the catalytic activity of MoS2 on the luminol-H2O2-MoS2 CL reaction, leading to CL quenching. The CL intensity decreased linearly with increasing concentration of Hg 2+ from 0.005-40 μM. The limit of detection (LOD) was estimated to be 1 nM. The relative standard deviation (RSD) was found to be 3.71%, indicating good reproducibility. The recoveries of Hg 2+ spiked in tap water were from 100.0 to 116.0% with RSD from 2.7 to 5.6%, detected by the standard addition method, and demonstrated good applicability.

show abstract

“…1 This is why a range of methodologies have recently been published. Here we mention only selected methodologies: differential pulse polarography, 2 isotope-dilution inductively coupled plasma mass spectrometry (ICP-MS), 3 the kinetic spectrophotometric method, 4 flow injection-green chemical vapor generation-atomic fluorescence spectrometry (AFS), 5 chemiluminescence quenching, 6 and high-performance liquid chromatography-inductively coupled plasma mass spectrometry (HPLC-ICP-MS). 7 One can also find review articles devoted to the determination of mercury.…”

Section: Introductionmentioning

confidence: 99%

Spectrophotometric determination of mercury using vortex-assisted liquid--liquid microextraction

Antolova¹,

Zaruba²,

Šandrejová³

et al. 2016

Turk J Chem

View full text Add to dashboard Cite

A novel method for the determination of mercury(II) is suggested. The procedure is based on the formation of an ion associate between the bromide complex of Hg(II) and Astrazon Red 6B dye and vortex-assisted liquid-liquid microextraction of the ion associate formed, with subsequent spectrophotometric detection. The variables that affect the procedure, such as pH, the concentration of ligand and dye, the type and volume of extraction solvent, and the rate and time of vortex mixing, were optimized. Under optimum conditions (pH 2.0, 0.01 mol L −1 KBr, 2 × 10 −4 mol L −1 AR6B, 50 µ L of the extraction mixture toluene:dichlorethane, 4:1, v:v, vortex mixing for 100 s at 1600 rpm) the linear range was 8 to 200 µ g L −1 Hg(II), with the limit of detection at 1.5 µ g L −1. The method was applied to the determination of mercury in water samples.

show abstract

Inhibition of rhodamine B–ferricyanide chemiluminescence by Au nanoparticles toward the sensitive determination of mercury (II) ions

Cited by 15 publications

References 37 publications

A Chemiluminescent Method for the Detection of H2O2 and Glucose Based on Intrinsic Peroxidase-Like Activity of WS2 Quantum Dots

A Chemiluminescent Method for the Detection of H2O2 and Glucose Based on Intrinsic Peroxidase-Like Activity of WS2 Quantum Dots

Sensitive Chemiluminescent Sensing Method for Mercury(II) Ions Based on Monolayer Molybdenum Disulfide

Spectrophotometric determination of mercury using vortex-assisted liquid--liquid microextraction

Contact Info

Product

Resources

About