In situ immobilization of cobalt phthalocyanine on the mesoporous carbon ceramic SiO2/C prepared by the sol–gel process. Evaluation as an electrochemical sensor for oxalic acid

Rahim, Abdur; Barros, Sergio Bitencourt Araújo; Arenas, Leliz Ticona; Gushikem, Yoshitaka

doi:10.1016/j.electacta.2010.11.009

Cited by 32 publications

(23 citation statements)

References 43 publications

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“…The material SiO 2 /C was prepared following a procedure described elsewhere 19. The SiO 2 /C 50 % composite material was prepared by the sol‐gel method: initially, tetraethylorthosilicate (TEOS, Sigma‐Aldrich 99 %) was pre‐hydrolyzed in an ethanol solution catalyzed by HNO 3 at 70 °C for 3 hours.…”

Section: Methodsmentioning

confidence: 99%

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Electrochemical Detection of Nitrite in Meat and Water Samples Using a Mesoporous Carbon Ceramic SiO₂/C Electrode Modified with In Situ Generated Manganese(II) Phthalocyanine

et al. 2014

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Mesoporous carbon ceramic SiO2/50 wt % C (SBET=170 m2 g−1), where C is graphite, were prepared by the sol‐gel method. The materials were characterized using N2 sorption isotherms, scanning electron microscopy, and conductivity measurements. The matrix was used as support for the in situ immobilization of Mn(II) phthalocyanine (MnPc) on their surface. XPS was used to determine the Mn/Si atomic ratios of the MnPc‐modified materials. Pressed disk electrodes were prepared with the MnPc‐modified matrix, and tested as an electrochemical sensor for nitrite oxidation. The linear response range, sensitivity, detection limit and quantification limit were 0.79–15.74 µmol L−1, 17.31 µA L µmol−1, 0.02 µmol L−1 and 0.79 µmol L−1, respectively, obtained using cyclic voltammetry. The repeatability of the proposed sensor, evaluated in terms of relative standard deviation was 1.7 % for 10 measurements of a solution of 12.63 µmol L−1 nitrite. The sensor employed to determine nitrite in sausage meat, river and lake water samples showed to be a promising tool for this purpose.

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Section: Methodsmentioning

confidence: 99%

“…Owing to their interesting redox properties, the transition metal phthalocyanine (MPc) complexes have been used as sensing materials for the detection of some biologically and environmentally important compounds, such as H 2 O 2 16, dissolved O 2 17, 18, oxalic acid 19, thiols 20, 21, dopamine 22, thiocyanate 23 and epinephrine 24.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Detection of Nitrite in Meat and Water Samples Using a Mesoporous Carbon Ceramic SiO₂/C Electrode Modified with In Situ Generated Manganese(II) Phthalocyanine

et al. 2014

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“…23 In brief, 1.0 g of SiO 2 /C was immersed in 10 mL of 0.01 mol dm −3 copper acetate Cu(OAc) 2 followed by heating in a water bath at 343 K until complete evaporation of the solvent take place. 23 In brief, 1.0 g of SiO 2 /C was immersed in 10 mL of 0.01 mol dm −3 copper acetate Cu(OAc) 2 followed by heating in a water bath at 343 K until complete evaporation of the solvent take place.…”

Section: In Situ Synthesis Of Cu(ii) Phthalocyanine In the Pores Of Tmentioning

confidence: 99%

“…4-APh may be dangerous, which can cause teratogenic effect and nephrotoxicity. [21][22][23] The silica backbone, itself is electrochemically inactive, not only provides rigidity to the material, but the electroactive species can attach through physical entrapment or covalent and non-covalent binding, wherein the charge transfer occurs preferably by electron hopping. As a result, large amounts of 4-APh may be unavoidably released into the environment as a pollutant.…”

Section: Introductionmentioning

confidence: 99%

Copper phthalocyanine modified SiO₂/C electrode as a biomimetic electrocatalyst for 4-aminophenol in the development of an amperometric sensor

et al. 2015

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A selective, simple, and low cost method for 4-aminophenol (4-APh) determination was developed using the mesoporous carbon ceramic SiO 2 /50 wt% C (S BET = 170 m 2 g −1 ), composite was prepared by the sol-gel method. The material was fabricated to use as matrix to support copper phthalocyanine (CuPc), prepared in situ on their surface, to assure homogeneous dispersion of the electrocatalyst complex in the pores of the matrix. The pressed disk electrodes made of SiO 2 /C/CuPc was tested as amperometric sensors for 4-APh. Under the optimized conditions, at −75 mV vs SCE in 0.06 mol dm −3 Britton-Robinson buffer (BRB) solution (pH 7.0) containing 250 µmol dm −3 of H 2 O 2 , a linear response range for 4APh from 5 up to 230 µmol dm −3 was obtained with a sensitivity of 123 nA dm -3 µmol −1 cm −2 and the limit of detection LOD was 2 (± 0.002 ) nmol dm −3 . The prepared sensors present a stable response during successive determinations. The repeatability, evaluated in terms of relative standard deviation of 3% for n = 10 and µmol dm -3 4-APh. The response time was 1 s and life time 12 months. Finally, the sensor was tested to determine 4-APh in the sample, and gives very good results for its determination.The presence of other phenols like 2-aminophenol, hydroquinone, catechol, cysteine and resorcinol did not show any interference in the detection of 4-APh on this electrode, even in the same concentration with the 4-APh.

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“…Among the anionic electroactive species, the metallophthalocyanines are well known for their excellent catalytic properties for several reactions [37], with high chemical and thermal stability [38]. They have been used in electrochemical sensors to detect analytes such as serotonin [39], dissolved oxygen [40], nitric oxide [41], cysteine [42], nitrite [43], oxalic acid [44], ascorbic acid [45,46], uric acid [46], phenols [47], and more specifically the dopamine [36,45,46,48,49].…”

Section: Introductionmentioning

confidence: 99%

Mesoporous silica xerogel modified with bridged ionic silsesquioxane used to immobilize copper tetrasulfonated phthalocyanine applied to electrochemical determination of dopamine

Deon

Caldas

Rosa

et al. 2014

J Solid State Electrochem

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Silica xerogel was modified with an ionic s i l s e s q u i o x a n e c o n t a i n i n g t h e c a t i o n i c 1 , 4 -diazoniabicyclo[2.2.2]octane bridged group and it was used as matrix for immobilization of copper tetrasulfonated phthalocyanine, resulting in Si/Db/CuTsPc material. This material was characterized by ultraviolet-visible and infrared spectroscopy, elemental and thermogravimetric analyses, nitrogen adsorption-desorption isotherms, and scanning electron microscopy. The Si/Db/CuTsPc material was used to develop a carbon paste electrode for dopamine determination. The electrochemical behavior of dopamine was evaluated by cyclic voltammetry and chronoamperometry. The optimal experimental conditions were determined (pH=4.5 and oxygen atmosphere) using a 0.1 mol L −1 phosphate buffer solution. The carbon paste electrode modified with the Si/Db/CuTsPc material shows a linear response for current intensity with the dopamine concentration in the range of 0.010 to 0.107 mmol L −1 . The detection limit was 0.42 μmol L −1 , and the sensitivity was 7.15 μA (mmol L −1 ) −1 , making the system promising to be applied as electrochemical sensor for dopamine.

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In situ immobilization of cobalt phthalocyanine on the mesoporous carbon ceramic SiO2/C prepared by the sol–gel process. Evaluation as an electrochemical sensor for oxalic acid

Cited by 32 publications

References 43 publications

Electrochemical Detection of Nitrite in Meat and Water Samples Using a Mesoporous Carbon Ceramic SiO₂/C Electrode Modified with In Situ Generated Manganese(II) Phthalocyanine

Electrochemical Detection of Nitrite in Meat and Water Samples Using a Mesoporous Carbon Ceramic SiO₂/C Electrode Modified with In Situ Generated Manganese(II) Phthalocyanine

Copper phthalocyanine modified SiO₂/C electrode as a biomimetic electrocatalyst for 4-aminophenol in the development of an amperometric sensor

Mesoporous silica xerogel modified with bridged ionic silsesquioxane used to immobilize copper tetrasulfonated phthalocyanine applied to electrochemical determination of dopamine

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In situ immobilization of cobalt phthalocyanine on the mesoporous carbon ceramic SiO2/C prepared by the sol–gel process. Evaluation as an electrochemical sensor for oxalic acid

Cited by 32 publications

References 43 publications

Electrochemical Detection of Nitrite in Meat and Water Samples Using a Mesoporous Carbon Ceramic SiO2/C Electrode Modified with In Situ Generated Manganese(II) Phthalocyanine

Electrochemical Detection of Nitrite in Meat and Water Samples Using a Mesoporous Carbon Ceramic SiO2/C Electrode Modified with In Situ Generated Manganese(II) Phthalocyanine

Copper phthalocyanine modified SiO2/C electrode as a biomimetic electrocatalyst for 4-aminophenol in the development of an amperometric sensor

Mesoporous silica xerogel modified with bridged ionic silsesquioxane used to immobilize copper tetrasulfonated phthalocyanine applied to electrochemical determination of dopamine

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Electrochemical Detection of Nitrite in Meat and Water Samples Using a Mesoporous Carbon Ceramic SiO₂/C Electrode Modified with In Situ Generated Manganese(II) Phthalocyanine

Electrochemical Detection of Nitrite in Meat and Water Samples Using a Mesoporous Carbon Ceramic SiO₂/C Electrode Modified with In Situ Generated Manganese(II) Phthalocyanine

Copper phthalocyanine modified SiO₂/C electrode as a biomimetic electrocatalyst for 4-aminophenol in the development of an amperometric sensor