Electrochemical sensing of H2O2 using cobalt oxide modified TiO2 nanotubes

Ullah, Rahim; Rasheed, Muhammad Asim; Abbas, Shafqat; Rehman, Khalil-ul; Shah, Attaullah; Ullah, Karim; Khan, Yaqoob; Bibi, Maryam; Ahmad, Mashkoor; Ali, Ghafar

doi:10.1016/j.cap.2022.02.008

Cited by 27 publications

(9 citation statements)

References 41 publications

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“…Hydrogen peroxide (H2O2) is an important industrial raw material, which is widely used in the fields of chemical, pharmaceutical and environment, etc [1][2][3] . Research shows that higher levels of H2O2 exposure increase the risk of neurological diseases such as Parkinson's [4,5] . Therefore, it is important to realize the quantitative and timely monitoring on the concentration of H2O2.…”

Section: Introductionmentioning

confidence: 99%

CuO modified Si nanowires for enzyme-free photoelectrochemical sensing of H2O2

Zhang¹,

Ke²,

Lu³

et al. 2023

Third Optics Frontier Conference (OFS 2023)

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Constructing novel hybrid nanostructure has become an effective strategy to enhance the performance of photoelectrochemical (PEC) biosensors. However, most of the H2O2-sensing photoelectrodes require enzyme modification, which limits the working environment and sensing performance. Herein, the burr-like CuO nanostructures are modified on the entire surfaces of the ordered Si nanowires (SiNWs) by using a combination of magnetron sputtering and hydrothermal growth. The optimized CuO@SiNWs heterojunction with a core-shell structure enables enzyme-free PEC detection of H2O2, achieving a sensitivity of 227.76 AmM -1 cm -2 in the concentration range of 0-588 mM and a detection limit of 7.14 μM (Signal/Noise=3). The excellent sensing performance of the CuO@SiNWs is attributed to the large specific surface area provided by SiNWs and the CuO possess desired H2O2-catalytic activity while providing a great number of active sites. In addition, the CuO@SiNWs demonstrates satisfactory optical absorption. This work demonstrates that enzyme-free and highly sensitive H2O2 detection can be achieved by hybrid nanostructure, providing an alternative route to H2O2 sensing.

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Section: Introductionmentioning

confidence: 99%

CuO modified Si nanowires for enzyme-free photoelectrochemical sensing of H2O2

Zhang¹,

Ke²,

Lu³

et al. 2023

Third Optics Frontier Conference (OFS 2023)

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“…Nanostructured materials are widely used as the working surface of the electrode [ 47 – 49 ]. The most common are transition metal nanoparticles [ 33 , 37 , 50 – 54 ], carbon nanotubes [ 8 ], metal oxides [ 55 – 64 ], graphene [ 32 – 33 ], and ordered mesoporous carbon [ 38 , 65 – 66 ]. Compared to bulk materials, nanostructures have higher catalytic activity and a significantly increased surface area-to-volume ratio, which makes it possible to significantly increase both sensitivity of the sensor and rate of detection of H 2 O 2 .…”

Section: Introductionmentioning

confidence: 99%

A non-enzymatic electrochemical hydrogen peroxide sensor based on copper oxide nanostructures

Mihailova¹,

Gerbreders²,

Krasovska³

et al. 2022

Beilstein J. Nanotechnol.

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This article describes the synthesis of nanostructured copper oxide on copper wires and its application for the detection of hydrogen peroxide. Copper oxide petal nanostructures were obtained by a one-step hydrothermal oxidation method. The resulting coating is uniform and dense and shows good adhesion to the wire surface. Structure, surface, and composition of the obtained samples were studied using field-emission scanning electron microscopy along with energy-dispersive spectroscopy and X-ray diffractometry. The resulting nanostructured samples were used for electrochemical determination of the H2O2 content in a 0.1 M NaOH buffer solution using cyclic voltammetry, differential pulse voltammetry, and i–t measurements. A good linear relationship between the peak current and the concentration of H2O2 in the range from 10 to 1800 μM was obtained. The sensitivity of the obtained CuO electrode is 439.19 μA·mM−1. The calculated limit of detection is 1.34 μM, assuming a signal-to-noise ratio of 3. The investigation of the system for sensitivity to interference showed that the most common interfering substances, that is, ascorbic acid, uric acid, dopamine, NaCl, glucose, and acetaminophen, do not affect the electrochemical response. The real milk sample test showed a high recovery rate (more than 95%). According to the obtained results, this sensor is suitable for practical use for the qualitative detection of H2O2 in real samples, as well as for the quantitative determination of its concentration.

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“…However, the detection of hydrogen peroxide on conventional electrodes requires high overpotentials, which might trigger interference from coexisting substances. To overcome such a drawback, various modified electrodes have been extensively constructed by the immobilization of efficient and selective catalysts, such as metal nanoparticles [6], metal oxides [7], metal hexacyanoferrates [8], and metal porphyrinoids (phthalocyanine, porphyrin, porphyrazine) [9][10][11]. The surface of the electrode may be also modified to produce an electrocatalyst-grafted electrode surface or the surface of the electrode may express electrocatalytic behavior itself [12,13].…”

Section: Introductionmentioning

confidence: 99%

A Synergistic Effect of Phthalimide-Substituted Sulfanyl Porphyrazines and Carbon Nanotubes to Improve the Electrocatalytic Detection of Hydrogen Peroxide

et al. 2022

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A sulfanyl porphyrazine derivative with peripheral phthalimide moieties was metallated with cobalt(II) and iron(II) metal ions. The purity of the macrocycles was confirmed by HPLC, and subsequently, compounds were characterized using various analytical methods (ES-TOF, MALDI-TOF, UV–VIS, and NMR spectroscopy). To obtain hybrid electroactive electrode materials, novel porphyrazines were combined with multiwalled carbon nanotubes. The electrocatalytic effect derived from cobalt(II) and iron(II) cations was evaluated. As a result, a significant decrease in the overpotential was observed compared with that obtained with bare glassy carbon (GC) or glassy carbon electrode/carbon nanotubes (GC/MWCNTs), which allowed for sensitive determination of hydrogen peroxide in neutral conditions (pH 7.4). The prepared sensor enables a linear response to H2O2 concentrations of 1–90 µM. A low detection limit of 0.18 μM and a high sensitivity of 640 μA mM−1 cm−2 were obtained. These results indicate that the obtained sensors could potentially be applied in biomedical and environmental fields.

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Electrochemical sensing of H2O2 using cobalt oxide modified TiO2 nanotubes

Cited by 27 publications

References 41 publications

CuO modified Si nanowires for enzyme-free photoelectrochemical sensing of H2O2

CuO modified Si nanowires for enzyme-free photoelectrochemical sensing of H2O2

A non-enzymatic electrochemical hydrogen peroxide sensor based on copper oxide nanostructures

A Synergistic Effect of Phthalimide-Substituted Sulfanyl Porphyrazines and Carbon Nanotubes to Improve the Electrocatalytic Detection of Hydrogen Peroxide

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