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Journal of Nanomaterials
Volume 2015, Article ID 214978, 5 pages
http://dx.doi.org/10.1155/2015/214978
Research Article

A Salt-Assisted Combustion Method to Prepare Well-Dispersed Octahedral MnCr2O4 Spinel Nanocrystals

School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450011, China

Received 12 April 2015; Accepted 17 May 2015

Academic Editor: Hassan Karimi-Maleh

Copyright © 2015 Yuping Tong et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Well-dispersed nanocrystalline MnCr2O4 was prepared by a salt-assisted combustion process using low-toxic glycine as fuel and Mn(NO3)2 and Cr(NO3)3·9H2O as raw materials. The obtained products were characterized by X-ray Diffraction (XRD), Fourier Transform Infrared (FT-IR) spectroscopy, Raman spectroscopy, Transmission Electron Microscopy (TEM), and Scanning Electron Microscopy (SEM). The fabrication process was monitored by thermogravimetric and differential thermal analysis (TG-DTA). The phase formation process was detected by XRD, and MnCr2O4 single phase with high crystallinity was formed at 700°C. TEM and SEM images revealed that the products were composed of well-dispersed octahedral nanocrystals with an average size of 80 nm. Inert salt-LiCl played an important role in breaking the network structure of agglomerated nanocrystallites.