Rare Earth-Promoted Nickel Oxide Nanoparticles as Catalysts for N2O Direct Decomposition

Abu-Zied, Bahaa M.; Bawaked, Salem M.; Kosa, Samia A.; Schwieger, Wilhelm

doi:10.3390/catal6050070

Cited by 26 publications

(17 citation statements)

References 44 publications

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“…In addition, the crystalline phases of Co 3 O 4 as (004), (220), (311), (422), (440), and (533) are closely matched with JCPDS no. 0042–1467 and prior authors [34,35] . The crystallographic dimension of the synthesized ZnO‐doped Co 3 O 4 NPs can evaluate applying Scherrer Equation as in below.

true normalD = (0.94 λ) / (β C o s θ)

…”

Section: Resultsmentioning

confidence: 99%

Assessment of Melamine in Different Water Samples with ZnO‐doped Co₃O₄Nanoparticles on a Glassy Carbon Electrode by Differential Pulse Voltammetry

Rahman

Alam

Asiri

et al. 2021

Chemistry An Asian Journal

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In this investigation, a melamine electrochemical sensor has been developed by using wet‐chemically synthesized low‐dimensional aggregated nanoparticles (NPs) of ZnO‐doped Co3O4 as sensing substrate that were decorated onto flat glassy carbon electrode (GCE). The characterization of NPs such as UV‐Vis, FTIR, XRD, XPS, EDS, and FESEM was done for detailed investigations in optical, functional, structural, elemental, and morphological analyses. The ZnO‐doped Co3O4 NPs decorated GCE was used as a sensing probe to analyze the target chemical melamine in a phosphate buffer at pH 5.7 by applying differential pulse voltammetry (DPV). It exhibited good performances in terms of sensor analytical parameters such as large linear dynamic range (LDR; 0.15–1.35 mM) of melamine detection, high sensitivity (80.6 μA mM−1 cm−2), low limit of detection (LOD; 0.118±0.005 mM), low limit of quantification (LOQ; 0.393 mM), and fast response time (30 s). Besides this, the good reproducibility (in several hours) and repeatability were investigated under identical conditions. Moreover, it was implemented to measure the long‐time stability, electron mobility, less charge‐transfer resistance, and analyzed diffusion‐controlled process for the oxidation reaction of the NPs assembled working GCE electrode, which showed outstanding chemical sensor performances. For validation, real environmental samples were collected from various water sources and investigated successfully with regard to the reliability of the selective melamine detection with prepared NPs coated sensor probe. Therefore, this approach might be introduced as an alternative route in the sensor technology to detect selectively unsafe chemicals by an electrochemical method with nanostructure‐doped materials for the safety of environmental, ecological, healthcare fields in a broad scale.

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true normalD = (0.94 λ) / (β C o s θ)

…”

Section: Resultsmentioning

confidence: 99%

Assessment of Melamine in Different Water Samples with ZnO‐doped Co₃O₄Nanoparticles on a Glassy Carbon Electrode by Differential Pulse Voltammetry

Rahman

Alam

Asiri

et al. 2021

Chemistry An Asian Journal

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“…To estimate the effect of strain on the line broadening, we used the well-known Williamson–Hall (W–H) plot where η (%) is a local lattice distortion parameter that corresponds to the strain (Figure S1 in Supporting Information). A steep drop (rise) in the ⟨ d XRD ⟩ (η) from 41(3) nm [0.06(1) %] to 26(1) nm (0.08(1) %) is evident upon increase of the Sm content from 0 to 1%, followed by a saturation behavior (Figure c) . The variation in the ⟨ d XRD ⟩ and η concerning Sm content is also supported by the reduced intensity of the PXRD diffractogram and the obtained ⟨ d ⟩ from FE-SEM.…”

Section: Resultsmentioning

confidence: 81%

Sm-Doped NiO Nanoparticles for Magnetic Memory at Room Temperature

Gandhi

Tummala

Chiu

et al. 2021

ACS Appl. Nano Mater.

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The search for diluted magnetic semiconductors (DMSs) has gained immense research interest because of the coexistence of the charge and spin degree of freedom in a single substance to realize a particular class of spintronic devices, and a rare earth (RE)-doped transition-metal oxide (TMO) is one of the choices. This study intends to understand the effect of RE Sm 3+ ion substitution in antiferromagnetic (AF) NiO nanoparticles (NPs) using modern cutting-edge techniques (synchrotron powder X-ray diffraction and soft X-ray absorption, Raman scattering, and superconducting quantum interference device magnetometry). A percolation threshold limit of about 1% incorporation of Sm 3+ ions at the Ni 2+ site was evident. An enhanced magnetic moment observed for an intermediate composition has been attributed to the interacting bound magnetic polaron. A core−shell model has been proposed such that the multivalent point defects reside at the surface of NPs, whereas the core of the particles retains AF properties. The exchange coupling mediated by interfacial frozen spins is the leading mechanism behind the magnetic memory effect at room temperature. The outcome of this study is vital for the future development of RE-functionalized TMO DMS spintronic devices and the understanding of their fundamental physics and chemistry.

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“…In the Figure A, the Ni 2p 3/2 peak of Ni 0.995 Y 0.005 O could be deconvoluted into two peaks at binding energies of 853.53 and 855.28 eV, indicating that there are two oxidation states of Ni ions. The peak at 853.53 eV should result from Ni 0 and the one at 855.28 eV should be attributed to Ni 2+ ions . The Ni 2p 3/2 peak of Ni 0.695 Y 0.005 Mg 0.3 O could also be deconvoluted into two peaks at 853.54 and 855.21 eV, indicating the presence of Ni 0 and Ni 2+ .…”

Section: Resultsmentioning

confidence: 96%

Electrical properties of Y/Mg modified NiO simple oxides for negative temperature coefficient thermistors

Xiang

et al. 2018

Int J Applied Ceramic Tech

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The semiconductors based on simple oxide have unique features with controllable electrical property by element doping. Y3+ doped NiO (Ni1−xYxO, x ≤ 0.01) and Mg2+ substituted Ni0.995Y0.005O (Ni0.995−yY0.005MgyO, y ≤ 0.5) powders were synthesized by a wet chemical method. The related ceramics were obtained by conventional ceramic processing. Phase component, microstructure, electrical property and temperature sensitivity of the prepared ceramics were investigated. All ceramics have a rock‐salt type crystalline structure. The room‐temperature resistivity of the ceramics can be widely adjusted from 254 to 12 322 Ω·cm by changing the concentrations of Y3+ and Mg2+ ions. The samples show typical characteristics of negative temperature coefficient of resistivity and have high temperature sensitivity with material constants higher than 4745 K. The analysis of impedance spectra indicates that the electrical properties resulted from both grain effect and grain boundary effect. Both band conduction and small polaron hopping were proposed as possible conduction mechanisms in the studied ceramics.

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Rare Earth-Promoted Nickel Oxide Nanoparticles as Catalysts for N2O Direct Decomposition

Cited by 26 publications

References 44 publications

Assessment of Melamine in Different Water Samples with ZnO‐doped Co₃O₄Nanoparticles on a Glassy Carbon Electrode by Differential Pulse Voltammetry

Assessment of Melamine in Different Water Samples with ZnO‐doped Co₃O₄Nanoparticles on a Glassy Carbon Electrode by Differential Pulse Voltammetry

Sm-Doped NiO Nanoparticles for Magnetic Memory at Room Temperature

Electrical properties of Y/Mg modified NiO simple oxides for negative temperature coefficient thermistors

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Rare Earth-Promoted Nickel Oxide Nanoparticles as Catalysts for N2O Direct Decomposition

Cited by 26 publications

References 44 publications

Assessment of Melamine in Different Water Samples with ZnO‐doped Co3O4Nanoparticles on a Glassy Carbon Electrode by Differential Pulse Voltammetry

Assessment of Melamine in Different Water Samples with ZnO‐doped Co3O4Nanoparticles on a Glassy Carbon Electrode by Differential Pulse Voltammetry

Sm-Doped NiO Nanoparticles for Magnetic Memory at Room Temperature

Electrical properties of Y/Mg modified NiO simple oxides for negative temperature coefficient thermistors

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Product

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Assessment of Melamine in Different Water Samples with ZnO‐doped Co₃O₄Nanoparticles on a Glassy Carbon Electrode by Differential Pulse Voltammetry

Assessment of Melamine in Different Water Samples with ZnO‐doped Co₃O₄Nanoparticles on a Glassy Carbon Electrode by Differential Pulse Voltammetry