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Rapid Synthesis and Characterization of Pure and Cobalt Doped Zinc Aluminate Nanoparticles via Microwave Assisted Combustion Method

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Zn1−x Co x Al2O4 (0 ≤ x ≤ 0.5) nanoparticles were synthesized employing L-alanine as fuel using MACT (microwave assisted combustion technique). The synthesized samples were characterized following methods such as X-ray Diffraction, high resolution scanning electron microscopy, Energydispersive X-ray spectroscopy; UV-visible diffused reflectance spectroscopy, FT-IR and VSM. The XRD confirmed the cubic spinel structure and the average crystallite size observed lying in the range of 12–19 nm deduced using the Debye Scherrer’s equation. The morphology of the Zn1−x Co x Al2O4 (0 ≤ x ≤ 0.5) nanoparticles is observed using HR-SEM. EDX analysis is opted for the elemental mapping of pure and cobalt doped zinc aluminate nanoparticles. Further band gap value was calculated using Kubelka Munk function, which was seen lying within 3.73 to 5.45 eV. The strong absorption band at 669, 556 and 500 cm−1 was associated with the vibrations of Zn–O, Al–O and Zn–O–Al of zinc aluminate nanoparticles. The hysteresis loops exhibited conversion from diamagnetic into super paramagnetic behaviour with increase in Co doping.
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Keywords: Direct Band Gap; Structural Analysis; Super Paramagnetic; Vibrational Analysis; Zinc Aluminate

Document Type: Research Article

Affiliations: 1: Department of Physics, Arignar Anna College (Arts & Science), Krishnagiri 635115, Tamilnadu, India 2: Department of Electronics and Communication Engineering, Centurion University of Technology and Management, Bhubaneswar 752050, India 3: Electro-Organic Division, CSIR-Central Electrochemical Research Institute, Karaikudi 630003, India 4: PG and Research Department of Physics, Paavendhar College of Arts & Science, M.V. South, Attur, Salem 636121, Tamilnadu, India

Publication date: April 1, 2020

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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