Cobalt manganite‐based hierarchically porous monoliths (HPMs) with three‐dimensionally (3D) interconnected macropores and open nanopores have been prepared via the sol–gel process accompanied by phase separation. The controlled hydrolysis and po...
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https://www.riss.kr/link?id=O111831309
2021년
-
0002-7820
1551-2916
SCI;SCIE;SCOPUS
학술저널
2449-2459 [※수록면이 p5 이하이면, Review, Columns, Editor's Note, Abstract 등일 경우가 있습니다.]
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
Cobalt manganite‐based hierarchically porous monoliths (HPMs) with three‐dimensionally (3D) interconnected macropores and open nanopores have been prepared via the sol–gel process accompanied by phase separation. The controlled hydrolysis and po...
Cobalt manganite‐based hierarchically porous monoliths (HPMs) with three‐dimensionally (3D) interconnected macropores and open nanopores have been prepared via the sol–gel process accompanied by phase separation. The controlled hydrolysis and polycondensation of the brominated metal alkoxides, which are generated from an incomplete reaction between epichlorohydrin and MBr2 (M = Co and Mn) in N,N‐dimethylformamide (DMF), form a monolithic gel based on the two divalent metal cations. The dual‐polymer strategy using polyvinylpyrrolidone (PVP) and poly(ethylene oxide) (PEO) effectively induces the spinodal decomposition, where PVP and PEO are preferentially distributed to the gel phase and fluid phase, respectively, resulting in a porous gel characterized by the co‐continuous structure. The effects of DMF and PVP on the porous morphology derived from the phase separation have been systematically studied. Calcination of the as‐dried gels allows for the crystallization into the spinel phase yielding hierarchically porous CoMn2O4 monoliths, which have been examined in detail by the structural and compositional analyses.
The hierarchically porous cobalt manganite monoliths were prepared via sol–gel process accompanied by phase separation. The crystalline CoMn2O4 can be obtained after heat‐treatment in air without losing its hierarchical pores.
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