Magnetic Hyperthermia and Photocatalytic Properties of MnFe 2 O 4 Nanoparticles Synthesized by Solvothermal Reflux Metho
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ORIGINAL PAPER
Magnetic Hyperthermia and Photocatalytic Properties of MnFe2O4 Nanoparticles Synthesized by Solvothermal Reflux Method A. Manohar 1,2 & C. Krishnamoorthi 1 & C. Pavithra 3 & Narayana Thota 4 Received: 8 February 2020 / Accepted: 14 September 2020 # Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Development of new superparamagnetic materials with narrow size distribution is crucial for biomedical and environmental applications. Hence, we report the synthesis of narrow size distributed single grain MnFe2O4 nanoparticles of average particle size 9 nm by solvothermal reflux method. Synthesized compound crystallized in face centered cubic spinel structure and is confirmed by X-ray diffraction profiles. Transmission electron micrograph shows narrow size distributed particles with an average particle size of 9 nm and is equal to crystallite diameter estimated from Scherrer equation. The spinel crystal structure is further confirmed by electron diffraction profiles, Fourier transformed infrared spectrum, and Raman spectrum at room temperature. Magnetic properties of the sample show superparamagnetic nature at room temperature with moderate saturated magnetization of 56.4 emug−1. Magnetic heating properties of nanoparticles dispersion show the attainment of hyperthermia temperature (43 °C) in a short span of time of 1.6 min for 2 mg/mL and 2.6 min for 1 mg/mL concentrations. Estimated specific heat generation rate or specific power absorption rate, from temporal temperature plots, is 145.78 Wg−1 and is useful for magnetic hyperthermia application in cancer therapy. Photocatalysis properties of sample show 96% of rhodamine B dye degradation in little less than 6 h under UV light irradiation and are useful for photocatalytic applications in wastewater treatment in industries. Keywords Solvothermal reflux method . Manganese ferrite nanoparticles . Photocatalytic . Magnetic hyperthermia
1 Introduction Magnetic nanoparticles (MNPs) synthesis and characterization studies are undertaken by many researchers around the globe due to innumerable applications in binary data storage, biomedical, catalysis, environmental, and healthcare applications. Among many biomedical applications, magnetic drug delivery, toxicity, magnetic resonance imaging, and magnetic hyperthermia are very relevant for the development of new
* A. Manohar [email protected] 1
Center for Nanotechnology Research, Vellore Institute of Technology, Vellore, Tamil Nadu 632014, India
2
Department of Materials Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
3
Department of Physics, Marudhar Kesari Jain college, Vaniyambadi, Tamil Nadu 635752, India
4
Solid State and Structural Chemistry Unit, Indian Institute of Science, Bengaluru 560012, India
technologies [1–17]. Further, among environmental applications, water purification, wastewater treatment, and photocatalysis are very important. Photocatalytic activity of many magnetic nanoparticles are being well studied
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