The fabrication of a new modified pencil graphite electrode for the electrocatalytic reduction of 2-nitrophenol in water samples

Baysal, Gülşen; Uzun, Demet; Hasdemır, Erdoğan

doi:10.1016/j.jelechem.2020.113893

Cited by 18 publications

(7 citation statements)

References 38 publications

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“…[6][7][8] However, the analytical methods such as flow injection analysis, [9] high-performance liquid chromatography, [10] spectrophotometry [11] and electrophoresis [13] are known for its efficiency and reliability to detect 2-nitrophenol (2-NP), but the voltammetric detection based on sensing electrons mediator on the anticipating working electrode is extremely concerned to researchers for its selective and sensitive performances. [13][14][15] Therefore, the various modified electrodes such as aerosol-assisted chemical vapor deposition of silver thin film electrodes, [16] electrochemically deposited polymethyl red film, [17] modified pencil graphite electrode, [18] acetylene black paste electrode modified with a graphene-chitosan composite, [19] bimetallic Prussian blue analogues (K x M[Fe(CN) 6 ] nH 2 O, M1 = 4 Ni, Co, and Mn) [20] and nontraditional carbon film composite electrode [21] have reported as reliable sensors to detect 2-NP. The objected of this study is to development of 2-NP voltammetric sensor using metal oxides as sensing substrate modified GCE.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Detection of 2‐Nitrophenol Using a Glassy Carbon Electrode Modified with BaO Nanorods

Alam

Asiri

Rahman

2021

Chemistry An Asian Journal

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Here, an electrochemical detection approach (differential pulse voltammetry) was employed to develop a 2nitrophenol (2-NP) sensor probe using a glassy carbon electrode (GCE) coated by wet-chemically synthesized nanorods (NRs) of BaO. The prepared BaO NRs were characterized by field-emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS) and powder X-ray diffraction (XRD) analysis. The peak currents by differential pulse voltammetric (DPV) analysis of 2-NP are plotted against the concentration to obtain the calibration curve of the 2-NP detection. It was found to be linear from 1.5 to 9.0 μM, defined as the dynamic range (LDR) for 2-NP detection in phosphate buffer solution. The sensor sensitivity was calculated from the slope of LDR by considering the active surface area of NRs coated on GCE (0.0316 cm 2 ) and found as 17.6 μAμM À 1 cm À 2 . The limit of detection (LOD) was calculated as 0.50 � 0.025 μM from the signal/noise (S/N) ratio of 3. Moreover, the sensor analytical parameters such as reproducibility, long-term performing ability (stability), response time and validity in real environmental samples were found acceptable and to give satisfactory results. The development of a nanomaterial-based electrochemical chemical sensor might be an effective approach to sensor technology to detect carcinogenic and hazardous toxins for environmental safety and healthcare fields in a broad scale.

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Section: Introductionmentioning

confidence: 99%

Electrochemical Detection of 2‐Nitrophenol Using a Glassy Carbon Electrode Modified with BaO Nanorods

Alam

Asiri

Rahman

2021

Chemistry An Asian Journal

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“…In the characterization of the modified surfaces, redox probes such as ferrocene and K 3 Fe(CN) 6 /K 4 Fe(CN) 6 are commonly used. [25] The electrochemical properties of the redox probes on the unmodified and modified electrode surfaces were compared. 1.0 mmol dm À3 K 3 Fe(CN) 6 /K 4 Fe(CN) 6 (Figure 2A) and 1.0 mmol dm À3 ferrocene (Figure 2B) redox probes were employed for the voltammetric characterization of ANSA-GC.…”

Section: Blocking Effect Of Ansa-gc Modified Electrode On Redox Probesmentioning

confidence: 99%

Electrochemical determination of 8-hydroxyquinoline in a cosmetic product on a glassy carbon electrode modified with 1-amino-2-naphthol-4-sulphonic acid

Calam

Yılmaz

2020

Instrumentation Science & Technology

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A new voltammetric method was developed for the simple, rapid and inexpensive determination of 8-hydroxyquinoline (8HQ) on a modified electrode obtained by the electrodeposition of 1-amino-2-naphthol-4-sulfonic acid (ANSA) on the surface of a glassy carbon (GC) electrode. The electrode interfacial properties were investigated by electrochemical impedance spectroscopy (EIS). The electrochemical response of the ANSA-GC electrode toward 8-hydroxyquinoline was investigated by the use of square wave voltammetry. The ANSA-GC modified electrode showed two linear plots with 8hydroxyquinoline concentrations from 5 Â 10 À7 to 1.4 Â 10 À5 mol dm À3 (R 2 of 0.9984) and from 1.4 Â 10 À5 to 4.25 Â 10 À4 mol dm À3 with a correlation coefficient R 2 equal to 0.9967. The limit of detection was 1.6 Â 10 À7 mol dm À3 . The ANSA-GC modified electrode also showed excellent stability and reproducibility for up to two weeks. The analytical application of the ANSA-GC modified electrode was investigated for the determination of 8-hydroxyquinoline in a blush cosmetic product. The results in good agreement to those obtained by spectrophotometry as a standard method.

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“…However, most of these techniques have several disadvantages such as a pretreatment requirement before determination, high cost of apparatus, being time-consuming [24]. Alternatively, the electrochemical techniques are preferred due to their high accuracy, precision, selectivity and sensitivity, simple and low-cost instrumentation, rapid response [25][26][27]. Also, the electrochemical techniques usually do not require a pretreatment process [28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Behavior and Ultrasensitive, Simple and Effective Voltammetric Determination of Acetaminophen Using Modified Glassy Carbon Electrode Based on 4‐Hydroxyquinoline‐3‐carboxylic Acid

Uzun

Calam

2022

Electroanalysis

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An electrochemical oxidation of acetaminophen (ACOP) has been successfully performed by using glassy carbon electrode covered with 4-hydroxyquinoline-3carboxylic acid (4HQ3CA) to reinforce electrode's feature. To characterize the modified electrode (4HQ3CA/ GC), electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and Fourier transform infrared spectroscopy (FT-IR) techniques were used. The finding optimum conditions (supporting electrolyte, pH) and the electrochemical determination studies were performed with differential pulse voltammetry (DPV). It was decided that the supporting electrolyte medium suitable for ACOP determination was Britton-Robinson (BR) buffer and the effect of pH change on the oxidation peak of ACOP in this media was investigated. The effect of changing scan rate on the oxidation peak of ACOP was examined and this study showed that the oxidation process of ACOP on the 4HQ3CA/GC modified electrode surface was diffusion and adsorption controlled process. A wide concentration range from 0.0025 μM to 141 μM with a limit of detection (LOD) of 5.98 × 10 À 10 M (3 s/m) was obtained. This prepared sensor was carried out for the determination of ACOP in pharmaceutical sample.

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The fabrication of a new modified pencil graphite electrode for the electrocatalytic reduction of 2-nitrophenol in water samples

Cited by 18 publications

References 38 publications

Electrochemical Detection of 2‐Nitrophenol Using a Glassy Carbon Electrode Modified with BaO Nanorods

Electrochemical Detection of 2‐Nitrophenol Using a Glassy Carbon Electrode Modified with BaO Nanorods

Electrochemical determination of 8-hydroxyquinoline in a cosmetic product on a glassy carbon electrode modified with 1-amino-2-naphthol-4-sulphonic acid

Electrochemical Behavior and Ultrasensitive, Simple and Effective Voltammetric Determination of Acetaminophen Using Modified Glassy Carbon Electrode Based on 4‐Hydroxyquinoline‐3‐carboxylic Acid

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