Structural and size dependence magnetic properties of Mn-doped NiO nanoparticles prepared by wet chemical method

Thangamani, C.; Kumar, P. Naveen; Gurushankar, K.; Pushpanathan, K.

doi:10.1007/s10854-020-03659-2

Cited by 24 publications

(8 citation statements)

References 36 publications

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“…Due to the smaller ionic radius of Mn ions compared to the Ni ion, the substitutional doping of Mn ion is possible on the Ni ion site. This is also in excellent harmony with the currently reported Mn:NiO studies. − Similarly, the ionic radii of Co 2+ is 0.65 Å, smaller than Ni 2+ , which proves substitutional doping. − …”

Section: Resultssupporting

confidence: 87%

Nanometer-Thick Mn:NiO and Co:NiO Films for High Performance Nonenzymatic Biosensors

Tutel

Koylan

Tunca

et al. 2021

ACS Appl. Nano Mater.

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People with diabetes require regular blood sugar level monitoring, using commercial enzyme-based biosensors. There is a considerable need to develop biosensors with nonenzymatic electrodes to eliminate the drawbacks of enzymes. Nanostructured nickel oxide (NiO) thin films are highly promising materials for the development of nonenzymatic glucose and hydrogen peroxide (H 2 O 2 ) biosensors. Although the biosensor performance can be easily attained with nonenzymatic electrodes, their commercialization still requires development of cost-effective and mass-production methods. In this work, we demonstrate the use of ultrasonic spray deposited, nanometer-thick, manganese and cobalt doped NiO (Mn:NiO and Co:NiO) films on indium tin oxide (ITO) coated glass substrates for glucose sensing. Sensor characterization followed detailed materials characterization. Nanometer-thick Co:NiO film electrodes showed better glucose sensor performance than those of bare NiO and Mn:NiO electrodes. High sensitivity of 1.67 μA/μM•cm 2 , a low detection limit of 231 nM, and a fast response time of 5.4 s within the linear range of 16−308 μM were obtained from nanometer-thick Co:NiO film electrodes. Amperometric measurements showed significant electrode reproducibility and stability. Nanometer-thick Co:NiO film electrode was also used to demonstrate actual clinical glucose measurements using human blood serum as a glucose source. Moreover, all fabricated nanometer-thick film electrodes were also utilized as H 2 O 2 sensors. This work provides a novel approach for monitoring the biosensor performance using nanometer-thick doped NiO film electrodes. Obtained results demonstrated the potential of ultrasonic spray deposition method for the massproduction of high-performance nonenzymatic nanometer-thick film biosensors.

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Section: Resultssupporting

confidence: 87%

Nanometer-Thick Mn:NiO and Co:NiO Films for High Performance Nonenzymatic Biosensors

Tutel

Koylan

Tunca

et al. 2021

ACS Appl. Nano Mater.

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“…This effect also implies the slight variation in the lattice parameter and strain values of pure NiO phase crystal, thereby decreasing the crystallite size of the doped sample. [24] The crystallite size of the Mn-doped NiO was estimated to be 8.9 nm, one of the smallest crystallite sizes obtained in the present study. The XRD pattern of the Co 3 O 4 catalyst is shown in Figure 2(c).…”

Section: Structural Analysiscontrasting

confidence: 49%

“…Mn reduces the intensity and disturbs the crystallinity of the pure NiO phase, shifting all the diffraction peaks slightly to the right (∼0.15°) to higher 2θ values. This effect also implies the slight variation in the lattice parameter and strain values of pure NiO phase crystal, thereby decreasing the crystallite size of the doped sample [24] . The crystallite size of the Mn‐doped NiO was estimated to be 8.9 nm, one of the smallest crystallite sizes obtained in the present study.…”

Section: Resultsmentioning

confidence: 54%

Effect of Mn Doped Ni−Co Mixed Oxide Catalysts on Urea Oxidation

et al. 2022

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Urea as an energy generation and storage fuel has attracted increased attention for its stability, non-toxicity, and availability. Urea possesses 10.1 wt.% of hydrogen. Nevertheless, its electrochemical oxidation is generally sluggish and inefficient. Nibased catalysts which showed efficient activity towards urea electrooxidation in the alkaline medium were studied for Direct Urea Fuel Cell (DUFC) anodes. In the present study, we investigated urea oxidation on a novel three-dimensional mixed oxide catalyst, NiCo 2 O 4 . Mn-doped NiCo 2 O 4 catalyst exhibited urea oxidation activity of 45.88 mA cm À 2 (at 1.30 V vs SHE), fifteen times higher than NiO and Co 3 O 4 and twice that of bare NiCo 2 O 4 spinel. Chronoamperometry curves of the Mn-doped NiCo 2 O 4 catalyst demonstrated stable urea oxidation for over 3 hours. The significantly higher mass activity of Mn-doped NiCo 2 O 4 catalyst is attributed to the least nano-crystallite size, better dispersion of Ni nuclei onto the spinel crystal matrix, enhanced Ni electrochemical active surface area, and lower bandgap.

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“…The absorption of IR in molecular vibrations further confirms the presence of functional groups in thin films. A vibrational frequency of 421 cm −1 represents the stretching vibration of the metaloxygen link [30][31]. The strong, intense peak at 3199 cm-1 is caused by water molecules stretching vibration O-H bonds [32].…”

Section: Functional Group Analysismentioning

confidence: 99%

Structural, Optical and Electrical Properties of V2O5 Thin films at different Molarities by Spray pyrolysis method

Fathima

Punithavthy

et al. 2022

J. Nig. Soc. Phys. Sci.

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Nowadays, Semiconducting thin films are the efficient candidates for good optical and electrical properties. In this study, the thin films of pure V2O5 together with 2 different molarities were prepared through the method of spray Pyrolysis. The prepared thin films were characterized by spectrographic tools such as XRD, FT-IR, UV-Vis and Hall effect to study their, crystalline nature, Functional group, band gap, resistivity, conductivity and mobility of the flow of electrons respectively. The structural morphology of the synthesized thin films was discussed through the micrographic image obtained from Scanning electron microscopy together with their surface occupancy plots. The obtained minimum crystallite size is about 26.8 nm for 4% molarities. The morphological and structural studies show enhanced results for 4% sample which makes it a viable candidature for optical and electrical applications.

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Structural and size dependence magnetic properties of Mn-doped NiO nanoparticles prepared by wet chemical method

Cited by 24 publications

References 36 publications

Nanometer-Thick Mn:NiO and Co:NiO Films for High Performance Nonenzymatic Biosensors

Nanometer-Thick Mn:NiO and Co:NiO Films for High Performance Nonenzymatic Biosensors

Effect of Mn Doped Ni−Co Mixed Oxide Catalysts on Urea Oxidation

Structural, Optical and Electrical Properties of V2O5 Thin films at different Molarities by Spray pyrolysis method

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