Issue 18, 2022

A new approach in the one-step synthesis of α-MnO2via a modified solution combustion procedure

Abstract

Manganese oxides were synthesized systematically via the solution combustion procedure using two kinds of fuels, namely glycine and urea. The influences of the type of fuel and the fuel ratio were deeply investigated to explain the phase evolution and morphology of the product. The synthesized nanostructured powder was characterized by X-ray diffraction, particle size analysis, and FESEM. Furthermore, the thermodynamic aspects of all the synthesis reactions were studied by the calculation of the adiabatic temperature. Various manganese oxides, such as MnO, Mn3O4, Mn2O3, and MnO2, were obtained by varying the fuel ratio from 0.15 to 2. It was found that decreasing the fuel ratio promoted the formation of MnO2 by declining the combustion temperature and reductive conditions of the system. However, α-MnO2 could be simply achieved by adding KNO3 in a modified solution combustion process under fuel-lean conditions. Further heat treatment of the product was found to increase the crystallinity of the α-MnO2 nanoparticles.

Graphical abstract: A new approach in the one-step synthesis of α-MnO2via a modified solution combustion procedure

Article information

Article type
Paper
Submitted
26 Apr 2022
Accepted
08 Aug 2022
First published
09 Aug 2022
This article is Open Access
Creative Commons BY license

Nanoscale Adv., 2022,4, 3909-3918

A new approach in the one-step synthesis of α-MnO2via a modified solution combustion procedure

M. M. Moqaddam, M. Mirjalili, J. V. Khaki and S. M. Beidokhti, Nanoscale Adv., 2022, 4, 3909 DOI: 10.1039/D2NA00257D

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