Detection of thiourea from electrorefining baths using silver nanoparticles-based sensors

Pedre, Ignacio; Battaglini, Fernando; Delgado, Gladis Judith Labrada; Sánchez-Loredo, María Guadalupe; González, G.

doi:10.1016/j.snb.2015.01.074

Cited by 19 publications

(8 citation statements)

References 32 publications

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“…As can be seen from Fig. 5A, the fluorescence recovery correlated well with the thiourea concentration range of 0.05-3.0 μM (R 2 = 0.990) with a linear detection limit of 10 nM, which was much lower than or comparable to those in the previously reported methods, 1,2,4,6,7,[10][11][12][13][14][15][34][35][36][42][43][44][45] and also nearly 100 times lower than the permitted value in the environment, indicating a rather high sensitivity.…”

Section: Colorimetric and Fluorescence Detection Of Thioureasupporting

confidence: 57%

A dual-mode signaling response of a AuNP-fluorescein based probe for specific detection of thiourea

Chen

Zhao

Sun

et al. 2016

Analyst

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By employing fluorescein and AuNPs as energy donors and acceptors, respectively, a novel fluorescence resonance energy transfer (FRET)-based dual-mode sensor for selective recognition and quantitative detection of thiourea was designed and constructed in this study for the first time. Herein, it is demonstrated that fluorescein could be adsorbed on the surface of AuNPs and induce fluorescence quenching through the well-known FRET process. The preferential introduction of thiourea would reduce the overall surface negative charges of AuNPs by replacing the original citrate groups, leading to the aggregation of AuNPs. Meanwhile, thiourea could prevent the binding between fluorescein and AuNPs, reduce the as-formed FRET effect, and then lead to fluorescence recovery of the fluorescein. Therefore, a dual-mode sensor with AuNP-related colorimetric and fluorescein-based fluorescence readout was rationally developed. Under the optimum conditions, the detection limits were calculated to be 10 nM and 23 nM for fluorescent and colorimetric sensors, individually, and a limit of 0.4 μM was detected by the naked eye. Finally, such a simple, convenient, cost-effective, highly selective and sensitive sensing assay was successfully applied in the detection of thiourea in tap water and fruit juice samples.

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Section: Colorimetric and Fluorescence Detection Of Thioureasupporting

confidence: 57%

A dual-mode signaling response of a AuNP-fluorescein based probe for specific detection of thiourea

Chen

Zhao

Sun

et al. 2016

Analyst

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“…Moreover, the iridium (III) complex has been used to detect TU in the living cell [15]. Using Ag/Cu nanoparticles, TU has been quantified analytically on an electronic refining bath [16]. Besides, the electrochemical I-V approach has been applied in the development of TU sensors based on Co 3 O 4 /MnO 2 nanoparticles [17] and SnO 2 /V 2 O 5 nanomaterials (NMs) [18] on GCEs.…”

Section: Introductionmentioning

confidence: 99%

Sensitive Detection of Thiourea Hazardous Toxin with Sandwich-Type Nafion/CuO/ZnO Nanospikes/Glassy Carbon Composite Electrodes

et al. 2021

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In this research study, we developed a voltammetric electrochemical sensor probe with a copolymer Nafion (Sulfonated Tetrafluoroethylene-based Fluoro-polymer) decorated with hydrothermally prepared sandwich-type CuO/ZnO nanospikes (NSs) onto a glassy carbon electrode (GCE) for reliable thiourea (TU) detection. The detailed characterizations in terms of structural morphology, binding energy, elemental compositions, grain size and crystallinity for synthesized NSs were performed by field emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS), energy-dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD) analysis, respectively. The differential pulse voltammetric (DPV) analysis for TU showed good linearity at current-versus-TU concentration on the calibration plot in the 0.15~1.20 mM range, which is defined as a dynamic detection range (LDR) of TU in a phosphate buffer solution. Considering the slope of LDR over the GCE-coated NSs surface area (0.0316 cm2), the TU sensor sensitivity (0.4122 µA µM−1 cm−2) was obtained. Besides this, the low limit (LOD) for TU detection was calculated and found to be 23.03 ± 1.15 µM. The fabricated Nafion/CuO/ZnO NSs/GCE sensor probe was created as a reliable sensor based on reproducibility, interference effect, stability and response time. Real bio-samples were investigated and the results confirm the anticipated reliability of the TU sensor probe. Thus, this is a noble way to develop enzyme-free electrochemical sensors that could be an alternative approach for the detection of chemicals in the field of enzyme-free biosensor development technology.

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“…There are many conventional analytical techniques for detection and analysis of Hg 2+ and TU, for example, atomic absorption spectrometry, [23,24] inductively coupled plasma atomic emission spectrometry, [25,26] chemiluminescence, [27] cold vapor atomic absorption spectrometry, [28][29][30] fluorescence detection, [31] supramolecular polymer networks [32,33] for Hg 2+ analysis, and UV-VIS, [34][35][36] mass spectrometry, [37,38] Fourier-transform infrared spectroscopy, [39] Raman spectroscopy, [40] high-performance liquid chromatography, [41] and electrochemical methods [42][43][44][45] for TU measurements. All of the methods described above for analysis of two species have some shortcomings, for example, they need time-consuming pretreatments, sophisticated operations, complicated detection processes, and relatively expensive instruments.…”

Section: Introductionmentioning

confidence: 99%

A novel colorimetric chemosensor for selective and highly sensitive determination of thiourea: An approach toward a molecular keypad lock

Tavallali

Rahimi

Deilamy‐Rad

et al. 2021

J Chinese Chemical Soc

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A novel simple reversible colorimetric chemosensor has been designed and developed using 4-(2-pridylazo) resorcinol (PAR). The colorimetric receptor PAR has been successfully applied for the determination of Hg 2+ ions, and then the PAR-Hg 2+ complex has been used for thiourea (TU) measurements in aqueous-buffer medium. This chemosensor exhibited an obvious color change from yellow to bright red in the presence of Hg 2+ in aqueous solution. In addition, the resulting PAR-Hg 2+ complex sensed TU through naked-eye, showing recovery from PAR-Hg 2+ to PAR, in aqueous solution. The detection limits reached up to 3.01 nmol/L for Hg 2+ and 8.5 nmol/L for TU. The operational simplicity and cost-effectiveness of colorimetric measurements using PAR and Hg 2+ were achieved. Based on this, the designed method was well used to determine the analytes in industrial and environmental samples. The molecular switching between two chemical inputs (Hg 2+ , TU) consequences in the IMPLICATION molecular logic gate, which has been integrated sequentially to procedure a sequential information processing device.

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Detection of thiourea from electrorefining baths using silver nanoparticles-based sensors

Cited by 19 publications

References 32 publications

A dual-mode signaling response of a AuNP-fluorescein based probe for specific detection of thiourea

A dual-mode signaling response of a AuNP-fluorescein based probe for specific detection of thiourea

Sensitive Detection of Thiourea Hazardous Toxin with Sandwich-Type Nafion/CuO/ZnO Nanospikes/Glassy Carbon Composite Electrodes

A novel colorimetric chemosensor for selective and highly sensitive determination of thiourea: An approach toward a molecular keypad lock

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