Dissolved O2 sensor based on cobalt(II) phthalocyanine immobilized in situ on electrically conducting carbon ceramic mesoporous SiO2/C material

Rahim, Abdur; Santos, Lucas Samuel Soares dos; Barros, Sergio Bitencourt Araújo; Kubota, Lauro T.; Gushikem, Yoshitaka

doi:10.1016/j.snb.2012.10.110

Cited by 23 publications

(9 citation statements)

References 44 publications

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“…So far,most electrochemical DO biosensors werereported to utilize precious metals( Pt [28] and Au [29] )o rn on-precious metals (Fe [30] and Co [2] )a se lectrocatalysts, which are expensive and toxic to tissues. Therefore, nontoxic and metal-free carbon electrocatalysts are very attractive for the fabrication of wear-able electrochemical DO biosensors.…”

Section: Resultsmentioning

confidence: 99%

“…The oxygen reduction reaction (ORR) is the key process, not only in environmentally benign energy storage and conversion technologies, such as fuel cells and metal-air batteries, [1] but also in av ariety of biochemical reactions and even in electrochemicalb iosensors for the detection of dissolved oxygen (DO). [2] In biological systems, sufficient oxygen in bodily fluid is ap rerequisite to maintain normalm etabolic activities. For instance,e xtended-wear contact lenses often lead to deficiencies of dissolved oxygen (DO) in tears ands ubsequent ophthalmic diseases.…”

Section: Introductionmentioning

confidence: 99%

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Microporous N,P‐Codoped Graphitic Nanosheets as an Efficient Electrocatalyst for Oxygen Reduction in Whole pH Range for Energy Conversion and Biosensing Dissolved Oxygen

Lin

Chen

et al. 2018

Chemistry A European J

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Microporous N,P-codoped graphitic nanosheets (N,P-CMP-1000) were synthesized by thermal annealing (1000 °C) of as-synthesized conjugated microporous polymers (CMPs) in the presence of phytic acid, which can be used as an effective metal-free electrocatalyst for the oxygen reduction reaction (ORR) for energy conversion. In the whole pH range (i.e. alkaline, acidic, and neutral solutions), the obtained N,P-CMP-1000 exhibits superior electrocatalytic activity for ORR with a low overpotential, high current density, and good stability. Furthermore, N,P-CMP-1000 can also be applied for electrochemically sensing dissolved oxygen (DO), with a high sensitivity (1.89 μA mg L) and broad detection range (2.56 to 16.65 mg L ) due to its good electrocatalytic performance towards ORR in neutral solution. In vitro cytotoxicity tests (CCK-8 and Live/Dead Cell Double Staining Assay) of N,P-CMP-1000 extracts demonstrated its good biocompatibility to Human Corneal Epithelial Cells (HCEC), which shows its great potential as an eye-wearable biosensor for sensing DO in tears.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microporous N,P‐Codoped Graphitic Nanosheets as an Efficient Electrocatalyst for Oxygen Reduction in Whole pH Range for Energy Conversion and Biosensing Dissolved Oxygen

Lin

Chen

et al. 2018

Chemistry A European J

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“…31 The sol gel method was used to prepare SiO 2 /C containing 1:1 of SiO 2 and C. For desire synthesis, the tetraethylorthosilicate (TEOS) was pre-hydrolyzed in the ethanol solution catalyzed by HNO 3 at 70 0 C for 3 h. After that, graphite (Aldrich), deionized water and HF (Vetec) catalyst were added to the pre-hydrolyzed TEOS solution. 31 The sol gel method was used to prepare SiO 2 /C containing 1:1 of SiO 2 and C. For desire synthesis, the tetraethylorthosilicate (TEOS) was pre-hydrolyzed in the ethanol solution catalyzed by HNO 3 at 70 0 C for 3 h. After that, graphite (Aldrich), deionized water and HF (Vetec) catalyst were added to the pre-hydrolyzed TEOS solution.…”

Section: Preparation Of the Sio 2 /C By The Sol-gel Methodsmentioning

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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“…Up to now, several methods have been developed for DO detection such as titration, 1 colorimetry, 2 fluorescence, 3 chemiluminescence 4 and electrochemical sensor. [5][6][7][8][9] Among these analytic approaches, the electrochemical sensor has received lots of attention due to its fast speed, low cost, low detection limit and high accuracy. However, direct detection of DO at commercial electrode needs a high potential.…”

Section: Introductionmentioning

confidence: 99%

Dissolved oxygen detection by galvanic displacement-induced graphene/silver nanocomposite

Zheng

Fu³

et al. 2015

Bull Mater Sci

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This paper proposed a simple, efficient and sensitive electrochemical sensor for dissolved oxygen (DO) detection based on a galvanic displacement synthesized reduced graphene oxide-silver nanoparticles (RGO/Ag) composite modified grassy carbon electrode (GCE). The synthesized RGO/Ag nanocomposite was characterized by UV-vis spectroscopy, Raman spectroscopy, scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results indicate the graphene oxide (GO) has been successfully reduced during the galvanic displacement process and the average size of Ag nanoparticle is 52 nm. The RGO/Ag nanocomposite-modified GCE showed a significant enhancement of DO detection compared with bare and RGO-modified GCEs. Moreover, the proposed DO sensor also exhibited an excellent repeatability, reproducibility and anti-interference ability.

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Dissolved O2 sensor based on cobalt(II) phthalocyanine immobilized in situ on electrically conducting carbon ceramic mesoporous SiO2/C material

Cited by 23 publications

References 44 publications

Microporous N,P‐Codoped Graphitic Nanosheets as an Efficient Electrocatalyst for Oxygen Reduction in Whole pH Range for Energy Conversion and Biosensing Dissolved Oxygen

Microporous N,P‐Codoped Graphitic Nanosheets as an Efficient Electrocatalyst for Oxygen Reduction in Whole pH Range for Energy Conversion and Biosensing Dissolved Oxygen

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

Dissolved oxygen detection by galvanic displacement-induced graphene/silver nanocomposite

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Dissolved O2 sensor based on cobalt(II) phthalocyanine immobilized in situ on electrically conducting carbon ceramic mesoporous SiO2/C material

Cited by 23 publications

References 44 publications

Microporous N,P‐Codoped Graphitic Nanosheets as an Efficient Electrocatalyst for Oxygen Reduction in Whole pH Range for Energy Conversion and Biosensing Dissolved Oxygen

Microporous N,P‐Codoped Graphitic Nanosheets as an Efficient Electrocatalyst for Oxygen Reduction in Whole pH Range for Energy Conversion and Biosensing Dissolved Oxygen

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

Dissolved oxygen detection by galvanic displacement-induced graphene/silver nanocomposite

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