Layer-by-Layer AuNPs-SiPy + /Prussian blue nanoparticles modified electrodes: characterization and electrocatalytic effects

Calaça, Giselle Nathaly; Erdmann, Cristiane Andreia; Soares, Ana Leticia; Pessôa, Christiana Andrade; Fujiwara, Sérgio Toshio; Garcia, Jarem Raul; Vidotti, Marcio; Wohnrath, Karen

doi:10.1016/j.electacta.2017.07.185

Cited by 11 publications

(4 citation statements)

References 58 publications

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“…The applicability changes according to many factors, for example, the physical properties of the material. The water-solubility of some materials allows the stabilization of metallic nanoparticles [19][20][21] and the formation of stable films in solid substrates for electrode modification [22][23][24][25]. The non-water-soluble form has been used as an adsorbent of dyes and metals in aqueous solutions [26][27][28] and in the construction of some modified carbon paste electrodes [29,30].…”

Section: Introductionmentioning

confidence: 99%

A Novel Electrochemical Sensor Based on Silsesquioxane/Nickel (II) Phthalocyanine for the Determination of Sulfanilamide in Clinical and Drug Samples

et al. 2019

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This paper describes the immobilization of nickel (II) phthalocyanine‐tetrasulfonic acid tetrasodium salt (NiTsPc) in 3‐n‐propyl(3‐methylpyridinium) silsesquioxane chloride (Si3Pic+Cl−). This hybrid material was synthetized and characterized by 29Si NMR CP‐MAS, FTIR and DRS. The modified material, designated as Si3Pic+Cl−/NiTsPc, was used to build carbon paste electrodes to determine sulfanilamide (SFL) by differential pulse voltammetry. The modified electrode showed a higher current response when compared to the bare carbon paste electrode. The evaluation of SFL was possible in the presence of salicylic acid, commonly used in solid ointment compositions in a high concentration. Theoretical calculations using density functional theory were done aiming to shed light at dimerization process at SFL. The oxidation peak increased with increasing concentrations of SFL in the range of 35–301 μmol L−1. The LOD and LOQ values obtained were 12 and 35 μmol L−1 of SFL, respectively. The novel electrochemical sensor was successfully applied for the determination of SFL in pet drug samples, urine and serum through the standard addition method. Validation was performed through a comparison with values obtained by the molecular absorption spectrometry method and there were no significant differences in the results, as confirmed by the statistical paired t‐test. This demonstrates the promise of a new approach for analytical application in clinical and drug samples of sulfonamide compounds.

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Section: Introductionmentioning

confidence: 99%

A Novel Electrochemical Sensor Based on Silsesquioxane/Nickel (II) Phthalocyanine for the Determination of Sulfanilamide in Clinical and Drug Samples

et al. 2019

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“…The total standard free‐energy change is −177 kJ/mol. According to reaction (2), PB was obtained and probably replaces the citrate groups on the Au NPs surface [28] .

true 4 normalF {normale}^{3 +} + {2 normalH}_{2} normalO \to O_{2} + {4 normalH}^{+} + {4 normalF normale}^{2 +}

true {{normalK}^{+} + normalF {normale}^{2 +} + ([(, F, e) normalC normalN {)​}_{6} {]​}^{3 -} \to normalK ([], {F e}^{III}, ({{normalF normale}^{II} normalC normalN}_{6}))}_{}

…”

Section: Resultsmentioning

confidence: 99%

Size‐Dependent and Self‐Catalytic Gold@Prussian Blue Nanoparticles for the Electrochemical Detection of Hydrogen Peroxide

Zhang

Engelbrekt

et al. 2020

ChemElectroChem

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Prussian blue (PB) nanoparticle (NP)-based nanomaterials have become a subject of intense interest, because of their intriguing physical and chemical properties that differ from their bulk counterparts, leading to novel applications in electrocatalysis. However, the size effect of PB NPs on the electrocatalytic performance is still ambiguous and hinders further applications for the study of biomimetic sensors. In this work, a new approach to synthesize core-shell Au@PB NPs is presented, using gold nanoparticles as catalysts for the fabrication of size-controllable, highly stable, water-soluble, biologically compatible and highly electrochemically active PB NPs. As a result, all sizes of Au@PB NPs display high electrochemical activity towards peroxidase biomimicry. Furthermore, the size effect of PB-based electrocatalysis has been investigated, showing the best performance for 18 nm Au@PB NPs. This insight could be used for the design and application of PBbased nanomaterials in biosensors.

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“…Before the formal filming process, the FTO substrates were cleaned with following the previous reports [ 31 , 32 , 33 ]. CeO 2 -assembled FTO electrodes were prepared through electrophoretic deposition.…”

Section: Methodsmentioning

confidence: 99%

Oxygen Vacancy Injection on (111) CeO2 Nanocrystal Facets for Efficient H2O2 Detection

Wang

2022

Biosensors

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Facet and defect engineering have achieved great success in improving the catalytic performance of CeO2, but the inconsistent reports on the synergistic effect of facet and oxygen vacancy and the lack of investigation on the heavily doped oxygen vacancy keeps it an attractive subject. Inspired by this, CeO2 nanocrystals with selectively exposed crystalline facets (octahedron, cube, sphere, rod) and abundant oxygen vacancies have been synthesized to investigate the synergistic effect of facet and heavily doped oxygen vacancy. The contrasting electrochemical behavior displayed by diverse reduced CeO2 nanocrystals verifies that oxygen vacancy acts distinctly on different facets. The thermodynamically most stable CeO2 octahedron enclosed by heavily doped (111) facets surprisingly exhibited the optimum non-enzymatic H2O2 sensing performance, with a high sensitivity (128.83 µA mM−1 cm−2), a broad linear range (20 µM~13.61 mM), and a low detection limit (1.63 µM). Meanwhile, the sensor presented satisfying selectivity, repeatability, stability, as well as its feasibility in medical disinfectants. Furthermore, the synergistic effect of facet and oxygen vacancy was clarified by the inclined distribution states of oxygen vacancy and the electronic transmission property. This work enlightens prospective research on the synergistic effect of alternative crystal surface engineering strategies.

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Layer-by-Layer AuNPs-SiPy + /Prussian blue nanoparticles modified electrodes: characterization and electrocatalytic effects

Cited by 11 publications

References 58 publications

A Novel Electrochemical Sensor Based on Silsesquioxane/Nickel (II) Phthalocyanine for the Determination of Sulfanilamide in Clinical and Drug Samples

A Novel Electrochemical Sensor Based on Silsesquioxane/Nickel (II) Phthalocyanine for the Determination of Sulfanilamide in Clinical and Drug Samples

Size‐Dependent and Self‐Catalytic Gold@Prussian Blue Nanoparticles for the Electrochemical Detection of Hydrogen Peroxide

Oxygen Vacancy Injection on (111) CeO2 Nanocrystal Facets for Efficient H2O2 Detection

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