caa a22 4500 463232836 CHVBK 20180405153247.0 cr unu---uuuuu 170326e20070701xx s 000 0 eng 10.1007/s10853-006-0685-4 doi (NATIONALLICENCE)springer-10.1007/s10853-006-0685-4 Morphological control of Fe3O4 particles via glycothermal process [Elektronische Daten] [Seung-Beom Cho, Jun-Seok Noh, Sang-Jun Park, Dae-Young Lim, Sang-Heul Choi] Acicular magnetite (Fe3O4) powders were synthesized through new glycothermal dehydration by using crystalline α-FeOOH as precursor and glycols as solvent. When ethylene glycol was used as solvent, the phase was in-situ transformed from acicular α-FeOOH to α-Fe2O3 and finally to Fe3O4 at 270°C for 6h without morphological change. When water was added as a co-solvent in glycothermal reaction, Fe3O4 powders were synthesized through dissolution-recrystallization process at 230°C for 3h. The volume ratio of ethylene glycol to water (E/W) in the reaction has a strong effect on the morphology of the synthesized Fe3O4 particles. The particle shape of Fe3O4 particles changed from needle to sphere when the water content in E/W volume ratio increased from 0.5 to 1mL in mixed glycothermal condition. When the water were added by more than 10ml, the particle shape of Fe3O4 changed from sphere to octahedron truncated with the {100} faces and finally distinct octahedron with only {111} faces. Also, it is demonstrated that the size of Fe3O4 particles can be controlled from 1-2μm to 100-200nm by varying the reaction conditions such as the volume ratio of water to ethylene glycol and additive in glycothermal reaction. Springer Science+Business Media, LLC, 2007 Cho Seung-Beom Corporate R&D, LG Chemical Ltd., Research Park, 104-1, Moonji-dong, Yuseong-gu, 305-380, Daejeon, South Korea aut Noh Jun-Seok Corporate R&D, LG Chemical Ltd., Research Park, 104-1, Moonji-dong, Yuseong-gu, 305-380, Daejeon, South Korea aut Park Sang-Jun Department of Inorganic Materials Engineering, College of Engineering, Paichai University, Daejeon, South Korea aut Lim Dae-Young Department of Inorganic Materials Engineering, College of Engineering, Paichai University, Daejeon, South Korea aut Choi Sang-Heul Department of Inorganic Materials Engineering, Hanyang University, Seoul, Korea aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/13(2007-07-01), 4877-4886 0022-2461 42:13<4877 2007 42 10853 https://doi.org/10.1007/s10853-006-0685-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-0685-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cho Seung-Beom Corporate R&D, LG Chemical Ltd., Research Park, 104-1, Moonji-dong, Yuseong-gu, 305-380, Daejeon, South Korea aut NATIONALLICENCE 700 1- Noh Jun-Seok Corporate R&D, LG Chemical Ltd., Research Park, 104-1, Moonji-dong, Yuseong-gu, 305-380, Daejeon, South Korea aut NATIONALLICENCE 700 1- Park Sang-Jun Department of Inorganic Materials Engineering, College of Engineering, Paichai University, Daejeon, South Korea aut NATIONALLICENCE 700 1- Lim Dae-Young Department of Inorganic Materials Engineering, College of Engineering, Paichai University, Daejeon, South Korea aut NATIONALLICENCE 700 1- Choi Sang-Heul Department of Inorganic Materials Engineering, Hanyang University, Seoul, Korea aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/13(2007-07-01), 4877-4886 0022-2461 42:13<4877 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer