Effect of glycine–starch mixing ratio on the structural characteristics of MgAl2O4 nano-particles synthesized by sol

Motevalian, A., & Salem, S. (2016). Effect of glycine–starch mixing ratio on the structural characteristics of MgAl2O4 nano-particles synthesized by sol–gel combustion. Particuology, 24, 108-112. https://doi.org/10.1016/j.partic.2015.03.005

Effect of glycine–starch mixing ratio on the structural characteristics of MgAl₂O₄ nano-particles synthesized by sol–gel combustion

Arash Motevalian, Shiva Salem ^*

Faculty of Chemical Engineering, Urmia University of Technology, Urmia, Iran

10.1016/j.partic.2015.03.005

Volume 24, February 2016, Pages 108-112

Received 25 December 2014, Revised 22 February 2015, Accepted 3 March 2015, Available online 26 June 2015, Version of Record 21 January 2016.

E-mail: s.salem@che.uut.ac.ir

Highlights

• Pure MgAl₂O₄ powder was synthesized via the glycine–starch-nitrates auto-ignition.

• The presence of starch in the fuel facilitated the preparation of pure nanoparticles.

• The relationship between the starch content and surface area was investigated.

• The optimum potato starch content for achieving pure nanoparticles (<13 nm) was 40 wt%.

Abstract

Sol–gel auto-ignition was used to prepare nano-scale magnesium aluminate spinel, using nitrate salts as an oxidizer and glycine–starch mixtures as the fuel. The glycine–starch mixture was varied to understand the effect of fuel mixing ratio on the structural characteristics of the resulting magnesium aluminate. The products were characterized by thermogravimetric-differential thermal analyses, Fourier-transform infrared spectroscopy, X-ray diffraction, Brunauer–Emmett–Teller surface area measurements, and transmission electron microscopy. The phase purity and crystallite size of the powder products depended on the fuel mixing ratio. The presence of starch in the fuel facilitated the preparation of pure nano-particles. To prepare nano-particles of uniform spherical morphology and diameter of <13 nm, the starch content should be optimized to avoid agglomeration.

Graphical abstract

Keywords

MgAl₂O₄; Starch; Sol–gel; Combustion; Nano-particle; Agglomeration

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