Structural and electrochemical characterization of a cobalt phthalocyanine bulk-modified SiO2/SnO2 carbon ceramic electrode

Arguello, Jacqueline; Magosso, Hérica A.; R, Ramos Galván; Canevari, Thiago C.; Landers, Richard; Pimentel, V. L.; Gushikem, Yoshitaka

doi:10.1016/j.electacta.2008.06.023

Cited by 21 publications

(8 citation statements)

References 22 publications

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“…Metal tetrasulfonated phthalocyanines (M(II)TsPc; M=Fe, Co, Ni, Cu) are a class of water-soluble complexes that present significant potential for use in catalysis. When these complexes are incorporated in a solid matrix, they can be used as a modifier on electrode surfaces, which enables many applications, for example, in the electroanalytical field allowing different applications with an enhancement of electrochemical signal in several modified electrodes [34][35][36][37]. This paper describes the preparation, characterization and use of carbon paste electrodes chemically modified with 3-n-propyl(3-methylpyridinium) silsesquioxane chloride and nickel(II) phthalocyanine-tetrasulfonic acid tetrasodium salt (NiTsPc).…”

Section: Introductionmentioning

confidence: 99%

“…Metal tetrasulfonated phthalocyanines (M(II)TsPc; M=Fe, Co, Ni, Cu) are a class of water‐soluble complexes that present significant potential for use in catalysis. When these complexes are incorporated in a solid matrix, they can be used as a modifier on electrode surfaces, which enables many applications, for example, in the electroanalytical field allowing different applications with an enhancement of electrochemical signal in several modified electrodes .…”

Section: Introductionmentioning

confidence: 99%

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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%

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 carbon ceramic electrodes unmodified (CCE) and modified with SnO 2 (CCE/SnO 2 ), were prepared according to a procedure adapted from the literature [8,13,25]. The non-modified CCE was prepared by mixing trimethoxymethylsilane (MTMOS) methanol and hydrochloric acid 37%.…”

Section: Preparation Of Carbon Ceramic Electrodesmentioning

confidence: 99%

Carbon ceramic electrodes modified with mixed oxides SiO2/SnO2 for determination of levofloxacin

Ciórcero

Calaça

Pessôa

2017

J Solid State Electrochem

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The preparation of a carbon ceramic electrode modified with SnO 2 (CCE/SnO 2 ) using tin dibutyl diacetate as precursor was optimized by a 2 3 factorial design. The factors analyzed were catalyst (HCl), graphite/organic precursor ratio, and inorganic precursor (dibutyltin diacetate). The statistical treatment of the data showed that only the second-order interaction effect, catalyst × inorganic precursor, was significant at 95% confidence level, for the electrochemical response of the system. The obtained material was characterized by scanning electron microscopy (MEV), X-ray diffraction (XRD), RAMAN spectroscopy, XPS spectra, and voltammetric techniques. From the XPS spectra, it was confirmed the formation of the Si-O-Sn bond by the shift in the binding energy values referred to Sn 3d3/2 due to the interaction of Sn with SiOH species. The incorporation of SnO 2 provided an increment of the electrode response for levofloxacin, with Ipa = 147.0 μA for the ECC and Ipa = 228.8 μA for ECC/SnO 2 , indicating that SnO 2 when incorporated into the silica network enhances the electron transfer process. Under the optimized working conditions, the peak current increased linearly with the levofloxacin concentration in the range from 6.21×10 −5 to 6.97×10 −4 mol L −1 with quantification and detection limits o f 3 . 8 0 × 1 0 − 5 m o l L − 1 ( 1 4 . 0 7 m g L − 1 ) a nd 1.13×10 −5 mol L −1 (4.18 mg L −1 ), respectively.

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“…O gel referente as partículas primárias é chamado de gel coloidal que após a secagem resultará em matriz com maior porosidade que o gel polimérico (obtido utilizando-se catalisador ácido), com largas frações de poros entre 2 e 50 nm de diâmetro (mesoporos). (ALFAYA; KUBOTA, 2002), (BENVENUTTI, et al 2009), (LEV, et al 1997PRADO, 2005).…”

Section: Condensação Em Meio Básicounclassified

“…ZHENG, 2008), (TAN et al, 2005), (ZHU et al, 2007) Os primeiros eletrodos obtidos por esta técnica foram propostos por Lev e colaboradores (TSIONSKY et al, 1994) e desde então estes têm sido aplicados na determinação de diversas espécies de interesse. (ARGUELLO et al, 2008(ARGUELLO et al, , 2009, (MARONEZE et al, 2008). A vantagem destes materiais em relação aos demais eletrodos a base de carbono, é que estes combinam as propriedades do processo sol-gel tais como alta área superficial e a condutividade dos materiais de carbono, possibilitando dessa forma a obtenção de um eletrodo de superfície renovável similar ao eletrodo de pasta de carbono, porém mais robusto e de alta estabilidade.…”

Section: Introductionunclassified

Eletrodos de carbono cerâmico: parâmetros de preparação, propriedades e aplicações como sensores eletroquímicos.

Skeika

Zuconelli

Fujiwara

et al. 2009

Semin., Exact Tech. Scienc.

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A preparação de eletrodos a base de carbono cerâmico (ECC) tem sido aprimorada durante as últimas décadas, aumentando o potencial de aplicação desses eletrodos como sensores eletroquímicos. O interesse nestes materiais está principalmente relacionado às suas características tais como superfície renovável, alta estabilidade térmica e resistência mecânica. Nessa revisão apresentam-se alguns dos principais aspectos relacionados aos ECCs, tais como os fatores de preparação os quais influenciam diretamente nas propriedades eletroquímicas dos mesmos e algumas aplicações como sensores eletroquímicos. Dentre os fatores de preparação destacam-se a característica do precursor, o tipo de material de carbono além da proporção entre precursor, catalisador e material de carbono. A modificação do ECC com espécies mediadoras de elétrons pode ampliar a gama de aplicações como sensores eletroquímicos já que estes aumentam a seletividade e a sensibilidade.

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Structural and electrochemical characterization of a cobalt phthalocyanine bulk-modified SiO2/SnO2 carbon ceramic electrode

Cited by 21 publications

References 22 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

Carbon ceramic electrodes modified with mixed oxides SiO2/SnO2 for determination of levofloxacin

Eletrodos de carbono cerâmico: parâmetros de preparação, propriedades e aplicações como sensores eletroquímicos.

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