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Microemulsion‐made Magnesium Carbonate Hollow Nanospheres
Author(s) -
JungKönig Jan,
Feldmann Claus
Publication year - 2017
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201700156
Subject(s) - microemulsion , materials science , magnesium , carbonate , chemical engineering , specific surface area , sintering , nanotechnology , mineralogy , chemistry , composite material , catalysis , organic chemistry , metallurgy , pulmonary surfactant , engineering
Magnesium carbonate (MgCO 3 ) hollow nanospheres and their structural and thermal properties are presented. The hollow nanospheres are prepared via a microemulsion‐based synthesis using dibutylmagnesium(II) and CO 2 as the starting materials. Size, structure, and composition of the as‐prepared MgCO 3 hollow nanospheres are comprehensively validated by different analytical methods (SEM, STEM, TEM, XRD, FT‐IR, TG). Accordingly, they exhibit an outer diameter of 35 ± 9 nm, an inner cavity size of 17 ± 5 nm, and a wall thickness of 9 ± 3 nm. Furthermore, the as‐prepared MgCO 3 hollow nanospheres exhibit a specific surface area of 90 m 2 · g –1 and pore radii with a maximum at 10–15 nm that both reflect the inner cavity. By sintering (600 °C), the MgCO 3 hollow nanospheres can be converted to MgO, which does not show a hollow‐sphere structure but which still exhibits a high specific surface area (110 m 2 · g –1 ). The synthesis of MgCO 3 hollow nanospheres is generally shown for the first time.