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|
| Type |
Poster Presentation |
| Area |
Inorganic Chemistry |
| Room No. |
Event Hall |
| Time |
4월 19일 (목요일) 11:00~12:30 |
| Code |
INOR.P-180 |
| Subject |
Unique transformation behavior of manganese oxide nanocrystal during high temperature solid-state reaction within silica nanosphere |
| Authors |
Taewan Kwon, Kyun sang Ji, In Su Lee*
Department of Chemistry, Pohang University of Science and Technology, Korea
|
| Abstract |
The solid-state conversion of nanoparticles is the attractive synthetic approach which would contribute to understanding of conversion chemistry in nanoscale. We observed the unique thermal transformation behavior above the glass transition temperature (Tg) of silicate nanoparticles. The hollow manganese silicate nanoparticles, which are formed from MnO@SiO2 nanoparticles via reductive annealing process, refill their interior voids with surrounding manganese silicate phase at higher temperature than Tg of silicate. Interestingly, the manganese silicate core confined in silica nanoshell transform into porous structured core composed of Mn2O3 phase segregated from the silicate by subsequent annealing under the oxidative condition. We can obtain the porous Mn2O3 nanoparticles after removing the silica. In this study, we not only report our finding and understanding for this transformation, but also provide the insight into the conversion mechanism in solid-state reaction which could offer the novel pathway to synthesize complex nanomaterials. |
| E-mail |
tw1217kr@postech.ac.kr |
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121st General Meeting of the KCS