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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemistry
Thermal conversion of hollow prussian blue nanoparticles into nanoporous iron oxides with crystallized hematite Phase
European Journal of Inorganic Chemistry, No. 7, Year 2014
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Description
We recently demonstrated that Prussian blue (PB) coordination polymers can be successfully etched by acidic solution for the preparation of hollow PB nanoparticles (Angew. Chem. Int. Ed. 2012, 51, 984). In this paper, by using hollow PB nanoparticles as starting materials, we calcined them under various conditions to prepare nanoporous Fe oxides with a crystallized α-Fe 2O3 (hematite) phase. The obtained particles were carefully characterized by scanning electron microscopy, wide-angle X-ray diffraction, nitrogen gas adsorption-desorption isotherms, transmission electron microscopy, and Mössbauer spectroscopy. The morphologies, surface areas, and degrees of crystallinity of the samples were varied by changing the number of hours of calcination. After calcination at 400 °C for 4 h, formation of a crystallized α-Fe2O3 phase was confirmed, although some residues of amorphous and/or γ-Fe2O3 phases were also present. With a further increase in the calcination time (up to 7 h), the α-Fe2O3 phase was predominantly formed. The obtained sample exhibited high surface area, which will be useful for photocatalytic applications. Hollow Prussian blue nanoparticles are calcined under various reaction conditions to prepare nanoporous Fe oxides with a crystallized α-Fe2O3 (hematite) phase. The morphologies, surface areas, and degrees of crystallinity of the samples are varied by changing the number of hours of calcination. After calcination at 400 °C for 4 h, formation of a crystallized α-Fe2O3 phase is confirmed. Copyright © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Authors & Co-Authors
Hegazy, Mohamed Barakat Zakaria
Japan, Tokyo
Waseda University
Japan, Tsukuba
National Institute for Materials Science
Egypt, Tanta
Faculty of Science
Hu, Ming
Japan, Tsukuba
National Institute for Materials Science
Hayashi, Naoaki
Japan, Kyoto
Institute for Integrated Cell-material Sciences
Tsujimoto, Yoshihiro
Japan, Tsukuba
National Institute for Materials Science
Ishihara, Shinsuke
Japan, Tsukuba
National Institute for Materials Science
Imura, Masataka
Japan, Tsukuba
National Institute for Materials Science
Suzuki, Norihiro
Japan, Tsukuba
National Institute for Materials Science
Huang, Yuyuan
Taiwan, Taipei
National Taiwan University
Sakka, Yoshio
Japan, Tsukuba
National Institute for Materials Science
Ariga, Katsuhiko
Japan, Tsukuba
National Institute for Materials Science
Wu, Kevin Chia Wen
Taiwan, Taipei
National Taiwan University
Yamauchi, Yusuke
Japan, Tokyo
Waseda University
Japan, Tsukuba
National Institute for Materials Science
Japan, Kawaguchi
Japan Science and Technology Agency
Statistics
Citations: 25
Authors: 12
Affiliations: 6
Identifiers
Doi:
10.1002/ejic.201301307
ISSN:
14341948
e-ISSN:
10990682