<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>Composites of hematite (α-Fe2O3) nanoparticles with different materials (NiO, TiO2, MnO2 and Bi2O3) were synthesized. Effects of different materials on the microstructure and optical band gap of α-Fe2O3 nanoparticles were studied. Crystallite size and strain analysis indicated that the pure α-Fe2O3 nanoparticles were influenced by the presence of different materials in the composite sample. Crystallite size and strain estimated for all the samples followed opposite trends. However, the value of direct band gap decreased from ∼2.67 eV for the pure α-Fe2O3 nanoparticles to ∼2.5 eV for α-Fe2O3 composites with different materials. The value of indirect band gap, on the other hand, increased for all composite samples except for α-Fe2O3/Bi2O3.</p></abstract>

Composites of hematite (α-Fe2O3) nanoparticles with different materials (NiO, TiO2, MnO2 and Bi2O3) were synthesized. Effects of different materials on the microstructure and optical band gap of α-Fe2O3 nanoparticles were studied. Crystallite size and strain analysis indicated that the pure α-Fe2O3 nanoparticles were influenced by the presence of different materials in the composite sample. Crystallite size and strain estimated for all the samples followed opposite trends. However, the value of direct band gap decreased from ∼2.67 eV for the pure α-Fe2O3 nanoparticles to ∼2.5 eV for α-Fe2O3 composites with different materials. The value of indirect band gap, on the other hand, increased for all composite samples except for α-Fe2O3/Bi2O3.

Influence of different materials on the microstructure and optical band gap of α-Fe2O3 nanoparticles

Department of Physics, North Orissa University, Takatpur, Baripada, 757003, India

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Composites of hematite (α-Fe2O3) nanoparticles with different materials (NiO, TiO2, MnO2 and Bi2O3) were synthesized. Effects of different materials on the...

Influence of different materials on the microstructure and optical band gap of α-Fe2O3 nanoparticles

Published Online: Jul 22, 2014

Page range: 193 - 197

DOI: https://doi.org/10.2478/s13536-013-0171-z

Keywords
iron oxide, composite, microstructure, UV-Vis spectroscopy

© 2013 Wroclaw University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Influence of different materials on the microstructure and optical band gap of α-Fe2O3 nanoparticles

Published Online: Jul 22, 2014

Page range: 193 - 197

DOI: https://doi.org/10.2478/s13536-013-0171-z

Keywordsiron oxide, composite, microstructure, UV-Vis spectroscopy

© 2013 Wroclaw University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
iron oxide, composite, microstructure, UV-Vis spectroscopy