Synthesis, structural, morphological, optical and magnetic properties of Zn1−Co O (0 ≤ x ≤ 0.36) nanoparticles synthesized by sol-gel auto combustion method

Birajdar, Shankar D.; Khirade, Pankaj P.; Bhagwat, Vinay; Humbe, Ashok V.; Jadhav, K. M.

doi:10.1016/j.jallcom.2016.05.043

Cited by 34 publications

(19 citation statements)

References 85 publications

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“…1a. The results show that is two different Zn-O bond length within nanocluster: the short bond is 1.90 Å between two hexagons and long bond is 1.98 Å between a hexagon and a tetragon that is within the experimental data for Zn-O bonds [35,36] and earlier ab initio calculations [11][12][13].…”

Section: Computational Detailssupporting

confidence: 81%

A DFT study for adsorption of CO and H2 on Pt-doped ZnO nanocluster

et al. 2020

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Using density functional theory calculations, we studied structural, electronic and adsorption properties of CO and H 2 adsorption on the Pt-doped (ZnO) 12 nanoclusters. The more suitable position for the Pt atom is its lateral doping on the nanocluster surface. The lower energy gap for the Pt-doped (ZnO) 12 nanoclusters denotes that their conductivity is higher in comparison with the bare nanocluster. The results showed quite a reasonable increase in CO and H 2 gas molecules adsorption energies on the nanoclusters compared with the pristine (ZnO) 12 due to Pt doping. The sensitivity of the electronic and adsorption properties to the number of molecules was calculated as well. Upon CO adsorption on the Pt-doped (ZnO) 12 nanoclusters energy, it is better when no more than two molecules can be attached to one Pt atom, while H 2 adsorption provides at least three hydrogen molecules on Pt atom. Also, changes in electronic spectra of nanoclusters under the influence of adsorbed CO and H 2 molecules imply a decline in conductivity in such systems. These investigations proved that the Pt-doped (ZnO) 12 nanoclusters can be proposed as an approachable candidate in gas sensors for detecting CO and H 2 gas. Also, the calculation results of H 2 adsorption on Pt-doped (ZnO) 12 nanoclusters can help in consideration of the possibility of hydrogen storage media creation.

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Section: Computational Detailssupporting

confidence: 81%

A DFT study for adsorption of CO and H2 on Pt-doped ZnO nanocluster

et al. 2020

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“…Upon doping ZnO/SiO 2 with Co, Mn and Cu, the energy gap decreased. Many authors have been reported a reduction in the band gap energy with increase the Co‐doped concentration in ZnO prepared by different methods as a nanopowder or thin film . Moreover, Das et.al found also a reduction in energy gap of ZnO upon Cu introduced into ZnO matrix.…”

Section: Resultsmentioning

confidence: 99%

“…The reason for this reduction in the band gap upon doing ZnO/SiO 2 with transition metals was due to the sp–d exchange interactions between the band and the localized d electrons of the substituted Co 2+ , Cu 2+ or Mn 2+ ions. Moreover, the narrowing in band gap can be also explained by many‐body effects (electron interaction and impurity scattering) on the conduction and valence bands . Where, the many‐body effects attributed to merge the impurity band into the conduction band, in that way reducing the band gap …”

Section: Resultsmentioning

confidence: 99%

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Structural and optical properties of doped ZnO/SiO₂ nanocomposite

Mohamed

Abdel-Kader

Alhazime

2019

Int J Applied Ceramic Tech

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The synthesis of ZnO/SiO2 nanocomposite doped with Co, Cu and Mn nanoparticles were performed using sol‐gel method. Rietveld refinement analysis was done for the X‐ray diffraction data and results showed that all samples are single wurtzite hexagonal phase and have an average crystallite size ~14 nm. The lattice parameters, bond length, crystallite size, microstrain, dislocation density and the system volume were studied in details. Transmission electron microscopy technique showed that nanoparticles characterized by an elliptical shape. Fourier transform infrared and scanning electron microscope techniques proved the presence of SiO2 in the system. The energy gap values of both undoped and doped samples with Co, Mn and Cu were 2.84, 2.47, 2.71 and 2.8 eV, respectively. Photoluminescence spectra for undoped and doped ZnO/SiO2 were investigated in details.

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“…Most research about doping ZnO has resulted in improved optical and electrical properties due to improved morphology or intrinsic material properties [14][15][16][17][18][19][20].…”

Section: Recent Studies and Applicationsmentioning

confidence: 99%

ZnO Nanostructures Synthesized by Chemical Solutions

Garcia¹,

Neale²,

Arce‐Plaza³

et al. 2017

Nanostructured Materials - Fabrication to Applications

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Nanomaterials have been synthesized using several different techniques. Some of these techniques are sophisticated, expensive and need certain training before use. However, there are other highly efficient methods for preparing nanomaterials that are easy to work with and require no specialized equipment, making them relatively inexpensive routes for synthesis. The least expensive routes are those that are classified as solution-based techniques such as colloidal, sol-gel and microwave-assisted synthesis. The focus of this chapter is on a general description of each technique with recent advances in synthesis, doping processes and applications. Specifically, these processes are discussed in connection with the synthesis of ZnO compounds and its related nanomaterials.

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Synthesis, structural, morphological, optical and magnetic properties of Zn1−Co O (0 ≤ x ≤ 0.36) nanoparticles synthesized by sol-gel auto combustion method

Cited by 34 publications

References 85 publications

A DFT study for adsorption of CO and H2 on Pt-doped ZnO nanocluster

A DFT study for adsorption of CO and H2 on Pt-doped ZnO nanocluster

Structural and optical properties of doped ZnO/SiO₂ nanocomposite

ZnO Nanostructures Synthesized by Chemical Solutions

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Synthesis, structural, morphological, optical and magnetic properties of Zn1−Co O (0 ≤ x ≤ 0.36) nanoparticles synthesized by sol-gel auto combustion method

Cited by 34 publications

References 85 publications

A DFT study for adsorption of CO and H2 on Pt-doped ZnO nanocluster

A DFT study for adsorption of CO and H2 on Pt-doped ZnO nanocluster

Structural and optical properties of doped ZnO/SiO2 nanocomposite

ZnO Nanostructures Synthesized by Chemical Solutions

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Product

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Structural and optical properties of doped ZnO/SiO₂ nanocomposite