Microwave synthesis and spectroscopic characterization of manganese oxalate nanocrystals--颗粒学报PARTICUOLOGY

Lakshmi Reddy, S., Udayabashkar Reddy, G., Ramasubba Reddy, R., Siva Reddy, G., Frost, R. L., & Endo, T. (2013). Microwave synthesis and spectroscopic characterization of manganese oxalate nanocrystals. Particuology, 11(3), 340–345. https://doi.org/10.1016/j.partic.2012.06.009

Microwave synthesis and spectroscopic characterization of manganese oxalate nanocrystals

S. Lakshmi Reddy ^a, G. Udayabashkar Reddy ^a, R. Ramasubba Reddy ^a, G. Siva Reddy ^b, Ray L. Frost ^c *, Tamio Endo ^d

a Department of Physics, Sri Venkateswara Degree College, Kadapa 516 003, India
b Department of Chemistry, Sri Venkateswara University, Tirupati 517 502, India
c School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane Queensland 4001, Australia
d Faculty of Engineering, Mie University, TSU, Mie 514 8507, Japan

10.1016/j.partic.2012.06.009

Volume 11, Issue 3, June 2013, Pages 340-345

Received 1 March 2012, Revised 8 June 2012, Accepted 27 June 2012, Available online 1 November 2012.

E-mail: r.frost@qut.edu.au

Highlights

► MnC₂O₄·2H₂O nanoparticles were synthesized using a microwave reactor.

► Manganese oxalate nanocrystal was studied by XRD, TEM, EPR, optical absorption and NIR spectroscopy.

► The synthesized nanomaterials proved very pure and with a distorted rhombic octahedral structure.

Abstract

The microwave synthesis of MnC₂O₄·2H₂O nanoparticles was performed through the thermal double decomposition of oxalic acid dihydrate (C₂H₂O₄·2H₂O) and Mn(OAc)₂·4H₂O solutions using a CATA-2R microwave reactor. Structural characterization was performed using X-ray diffraction (XRD), particle size and shape were analyzed using transmission electron microscopy (TEM). The chemical in the structures was investigated using electron paramagnetic resonance (EPR) as well as optical absorption spectra and near-infrared (NIR) spectroscopies. The nanocrystals produced with this method were pure and had a distorted rhombic octahedral structure.

Graphical abstract

Keywords

Manganese oxalate; Lindbergite; Electron paramagnetic resonance; Optical absorption and NIR spectra; Mn(II); Water fundamentals

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