Fe-doped ZnO nanoparticles: Synthesis by a modified sol–gel method and characterization

Ciciliati, Mariani A.; Silva, Marcela F.; Fernandes, D.M.; Melo, M.A.C. de; Hechenleitner, Ana Adelina Winkler; Pineda, Edgardo Alfonso Gómez

doi:10.1016/j.matlet.2015.06.023

Cited by 151 publications

(56 citation statements)

References 19 publications

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“…The PVA polymer was dissolved in distilled water while stirring at ∼115°C for about 15 min with continuous stirring on magnetic stirrer [21]. The purpose of using PVA is to delay cations mobility and minimizing unwanted aggregation/agglomeration of the metal oxides [22].…”

Section: Synthesis Of Single and Ternary Metal Oxidesmentioning

confidence: 99%

PVA assisted ZnO based mesoporous ternary metal oxides nanomaterials: synthesis, optimization, and evaluation of antibacterial activity

Abebe

Murthy

Zereffa

et al. 2020

Mater. Res. Express

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The poly (vinyl alcohol) (PVA) assisted highly mesoporous Zn-Fe-Mn oxides nanomaterials were synthesized using the sol-gel followed by the self-propagation techniques. The UV-vis spectroscopic technique was used to study the optical properties of the materials. The presence of metal-oxygen bond and deposited OH − /H 2 O species were characterized by FT-IR spectroscopic technique. The porous morphology and elemental analysis were confirmed by the SEM/EDX and further morphological and crystal structure studies were conducted using TEM/HRTEM techniques. The semi-crystallinity and composition analyses were verified from XRD patterns. Using the BET N 2 adsorption-desorption analytical techniques; the porosity, specific surface area, and pore diameter enhancements were confirmed. The optima of PVA and precursors percentage were selected with the help of XRD, UV-Vis, and SEM techniques. The potential of the materials towards antibacterial activities was evaluated against both Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus bacteria. The 50(0.7) PVA assisted ternary metal oxide nanocomposite (PVA-TMONC) with 125 μg ml −1 concentration showed better inhibition zone for both Escherichia coli and Staphylococcus aureus bacteria, with a value of 28 and 29 mm in diameter, respectively.

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Section: Synthesis Of Single and Ternary Metal Oxidesmentioning

confidence: 99%

PVA assisted ZnO based mesoporous ternary metal oxides nanomaterials: synthesis, optimization, and evaluation of antibacterial activity

Abebe

Murthy

Zereffa

et al. 2020

Mater. Res. Express

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“…Finally, the cured composite catalysts are prepared after drying and calcining. 24 Sun et al 25 prepared five different nanoparticles of Pt/sulfonated graphene (Pt/sG) as anode electrocatalysts on alkaline direct ethanol fuel cell by the sol-gel method. The different particle diameters of the electrocatalysts were 1.7 nm, 2.5 nm, 3.5 nm, 4.4 nm, 13.9 nm, respectively ( Table 1).…”

Section: Sol-gel Methodsmentioning

confidence: 99%

Research Progress of Preparation Methods of Graphene Nanocomposites for Low-Temperature Fuel Cells and Lithium-Ion Batteries

Wang¹,

Zhou²,

Zhu³

et al. 2016

Kem. Ind.

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Because of its unique two-dimensional structure, huge specific surface area, high electrical conductivity, and other excellent performances, graphene has shown great potential for application in catalysis, electronics, sensors, energy storage, and other areas. Especially, graphene nanocomposites have been found to be promising catalyst support for low-temperature fuel cells, and as anode nanomaterials for high reversible capacity and excellent rate capability for lithium-ion batteries, which has triggered a new round of research hotspot. Preparation methods of graphene nanocomposites mainly for low-temperature fuel cells are reviewed. Particularly, the research progress and principles of physical preparation methods (molecular beam epitaxy), chemical preparation methods (chemical reduction, electrochemical deposition and hydrothermal/solvothermal methods, etc.) and high-energy ball milling are summarized. Research outlook of graphene nanocomposites for low-temperature fuel cells are prospected.

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“…For semiconducting oxides, as a tuning parameter to control the energy gap, doping with metals has been a favoured method. Various transition metals (TMs), e.g., Fe [12], Co, Mn [13], Ni [14], Cu [15] and Ag [16], have been used as dopants to reduce the energy gap in stoichiometric ZnO and enhance the magnetic and performance properties. Indeed, room temperature ferromagnetism has been predicted in TM-doped ZnO compounds.…”

Section: Introductionmentioning

confidence: 99%

Structural and optical characterization of Sm-doped ZnO nanoparticles

2019

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Micro-structural changes in zinc oxide (ZnO) nanoparticles induced by the substitution of Zn 2+ in ZnO by a rare earth (RE) metal ion, Sm 3+ , are investigated. Both pristine and Sm-doped ZnO with a nominal doping concentration of 1, 2 and 4% of Sm using a simple wet-chemical synthetic route followed by calcination at a high temperature of 900 • C, are synthesized. Structural investigations are primarily conducted using X-ray powder diffraction (XRPD) and scanning electron microscopy techniques. Evolution of structural parameters (unit cell parameters, average crystallite size, crystallinity percentage, lattice strain, stress, energy density and atomic packing factor) upon Sm doping is investigated together with Rietveld refinement and Le Bail analysis techniques. XRPD data confirmed that the synthesized nanostructures crystallize in a wurtzite hexagonal structure, the dopant Sm is incorporated into the Zn lattice and the annealing treatment plays a crucial role in determining the structural and optical properties of RE-metal-doped nanoparticles. Values of the optical band gap energy estimated from optical absorbance measurements reveal a widening of the band gap.

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Fe-doped ZnO nanoparticles: Synthesis by a modified sol–gel method and characterization

Cited by 151 publications

References 19 publications

PVA assisted ZnO based mesoporous ternary metal oxides nanomaterials: synthesis, optimization, and evaluation of antibacterial activity

PVA assisted ZnO based mesoporous ternary metal oxides nanomaterials: synthesis, optimization, and evaluation of antibacterial activity

Research Progress of Preparation Methods of Graphene Nanocomposites for Low-Temperature Fuel Cells and Lithium-Ion Batteries

Structural and optical characterization of Sm-doped ZnO nanoparticles

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