A new approach: Synthesis, characterization and optical studies of nano-zinc aluminate

Ragupathi, C.; Kennedy, L. John; Vijaya, J. Judith

doi:10.1016/j.apt.2013.04.013

Cited by 94 publications

(36 citation statements)

References 38 publications

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“…It demonstrate that obtained pattern have nine diffracted peaks at 31.2°, 36.75°, 44.7°, 49.1°, 55.6°, 59.3°, 65.3°, 74.1°and 77.3°and matched with (220), (311), (400), (331), (422), (511), (440), (620) and (533) hkl planes respectively. These hkl planes are clearly match with standard JCPDS card no 82-1043 which confirm the phase formation of cubic spinel zinc aluminte nanoparticles with Fd3m space group[28]. The absence of extra peaks confirms non-appearance of secondary impure phase.…”

supporting

confidence: 75%

Effect of Cu²⁺ ions on structural, morphological, optical and magnetic behaviors of ZnAl₂O₄ spinel

Nirmala¹,

Iyandurai

Yuvaraj

et al. 2020

Mater. Res. Express

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Zn 1−x Cu x Al 2 O 4 nanoparticles were prepared by microwave combustion technique with metal nitrates as precursor materials. Powder x-ray diffraction studies confirm the formation of single phase of spinel pure and copper doped zinc aluminates. HR-SEM images reveal the agglomerated coalescence morphology with pores. Elemental analysis (EDX) confirm the presence of Zn, Cu, Fe and O. UV-Visible Diffuse reflectance spectroscopy is used to find the optical bandgap and it is found to decreases from 5.45 eV to 3.57 eV. IR spectra show three major peaks which confirm the phase formation of Zn 1−x Cu x Al 2 O 4 nano aluminates with spinel structure. Vibrating sample magnetometer (VSM) measurements reveal the super paramagnetic nature of pure and copper doped zinc alumintes. The obtain results are confirmed that present pure and copper doped ZnAl 2 O 4 particles at nanoscale are to be potential candidate for catalytic, sensor and optoelectronic device applications.

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supporting

confidence: 75%

Effect of Cu²⁺ ions on structural, morphological, optical and magnetic behaviors of ZnAl₂O₄ spinel

Nirmala¹,

Iyandurai

Yuvaraj

et al. 2020

Mater. Res. Express

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“…8b). The three emission peaks at 400, 410, and 445 nm can be ascribed to intra band gap defects such as oxygen vacancies34. It has been noted that there is an obvious increase in the fluorescence intensity of the peak located at 400 nm when the Eg value decreases (see Fig.…”

Section: Resultsmentioning

confidence: 95%

A comparative study of ZnAl2O4 nanoparticles synthesized from different aluminum salts for use as fluorescence materials

Wang

Sun

Fang

et al. 2015

Sci Rep

145

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Three ZnAl2O4 samples were prepared via a modified polyacrylamide gel method using a citric acid solution with different aluminum salt starting materials, including AlCl3∙6H2O, Al2(SO4)3∙18H2O, and Al(NO3)3∙9H2O under identical conditions. The influence of different aluminum salts on the morphologies, phase purity, and optical and fluorescence properties of the as-prepared ZnAl2O4 nanoparticles were studied. The experimental results demonstrate that the phase purity, particle size, morphology, and optical and fluorescence properties of ZnAl2O4 nanoparticles can be manipulated by the use of different aluminum salts as starting materials. The energy bandgap (Eg) values of ZnAl2O4 nanoparticles increase with a decrease in particle size. The fluorescence spectra show that a major blue emission band around 400 nm and two weaker side bands located at 410 and 445 nm are observed when the excitation wavelength is 325 nm. The ZnAl2O4 nanoparticles prepared from Al(NO3)3∙9H2O exhibit the largest emission intensity among the three ZnAl2O4 samples, followed in turn by the ZnAl2O4 nanoparticles prepared from Al2(SO4)3∙18H2O and AlCl3∙6H2O. These differences are attributed to combinational changes in Eg and the defect types of the ZnAl2O4 nanoparticles.

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“…Most recently, plant extracts have also been used as both a reducing and a gelling agent for the synthesis of mixed metal oxides. The plant extract plays a role as a fuel, and also has an organizing action, apprehending the metal ions present in the amylose helix of the plant extract, and obstructing the separation of metal oxides synthesized through the green method, which has been reported previously [14,15,16,17,18,19]. …”

Section: Introductionmentioning

confidence: 99%

Microwave-Assisted Synthesis of Nickel Oxide Nanoparticles Using Coriandrum sativum Leaf Extract and Their Structural-Magnetic Catalytic Properties

2017

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In this paper, using Coriandrum sativum L., a leaf-extracted, assisted microwave method (MM) was used to synthesize nickel oxide formation. We synthesized nickel oxide nanoparticles (NiO) with a crystal size in the range of 15–16 nm by a Coriandrum sativum leaf-assisted microwave method (LAMM). The synthesized materials show that an X-ray diffraction (XRD) study confirmed the formation of a single phase structure exhibiting a crystallite size in the range of 15–16 nm using Scherrer’s method. The nickel oxide prepared by the MM had a surface area of 60.35 m2/g, pore volume of 0.9427 cm3/g and an average pore diameter of 13.27 Å. Surface morphology was analyzed by the scanning electron microscope (SEM), X-ray photoelectron spectroscope, Brunauer-Emmett-Teller (BET) analysis, and the vibrating sample magnetometer (VSM). Catalytic activity (CA) tended toward the oxidation of styrene to benzaldehyde. The inexpensive catalyst tested is likely effective as a catalyst due to synergistic interactions between metal oxides with high dispersion. In comparison with other findings, LAMM is easy and eco-friendly. The current study obtained nanocrystalline NiO that was suitable for potential applications in catalysis. The synthesized NiO could potentially be used in therapeutic field due to their competent antibacterial activity.

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A new approach: Synthesis, characterization and optical studies of nano-zinc aluminate

Cited by 94 publications

References 38 publications

Effect of Cu²⁺ ions on structural, morphological, optical and magnetic behaviors of ZnAl₂O₄ spinel

Effect of Cu²⁺ ions on structural, morphological, optical and magnetic behaviors of ZnAl₂O₄ spinel

A comparative study of ZnAl2O4 nanoparticles synthesized from different aluminum salts for use as fluorescence materials

Microwave-Assisted Synthesis of Nickel Oxide Nanoparticles Using Coriandrum sativum Leaf Extract and Their Structural-Magnetic Catalytic Properties

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A new approach: Synthesis, characterization and optical studies of nano-zinc aluminate

Cited by 94 publications

References 38 publications

Effect of Cu2+ ions on structural, morphological, optical and magnetic behaviors of ZnAl2O4 spinel

Effect of Cu2+ ions on structural, morphological, optical and magnetic behaviors of ZnAl2O4 spinel

A comparative study of ZnAl2O4 nanoparticles synthesized from different aluminum salts for use as fluorescence materials

Microwave-Assisted Synthesis of Nickel Oxide Nanoparticles Using Coriandrum sativum Leaf Extract and Their Structural-Magnetic Catalytic Properties

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Effect of Cu²⁺ ions on structural, morphological, optical and magnetic behaviors of ZnAl₂O₄ spinel

Effect of Cu²⁺ ions on structural, morphological, optical and magnetic behaviors of ZnAl₂O₄ spinel