Preparation of macroporous transition metal hydroxide monoliths via a sol-gel process accompanied by phase separation

Macroporous Ca12Al14O33(C12A7) mayenite monoliths have been successfully prepared via a sol-gel process in the presence of propylene oxide (PO) and poly (ethyleneoxide) (PEO). Gelation of CaO-Al2O3binary system with nitrates salts as additional precursors is accelerated by PO as an acid scavenger, while PEO works as a phase separation inducer to mediate the phase separation of the system. Appropriate PO and PEO amounts allow the formation of monolithic xerogel with interconnected macropores and co-continuous skeletons. The resultant dried gels are amorphous and the single crystalline phase Ca12Al14O33mayenite forms after heat-treatment at 1100 °C in air, while the macrostructure is preserved with a porosity as high as 78% and smoother and denser skeletons.

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Introduction of Organic Moieties into Transition-Metal Oxide Matrices via Phosphonate Groups

MRS Proceedings ◽

10.1557/proc-519-345 ◽

1998 ◽

Vol 519 ◽

Cited By ~ 8

Author(s):

P.H. Mutin ◽

C. Delenne ◽

D. Medoukali ◽

R. Corriu ◽

A. Vioux

Keyword(s):

Transition Metal ◽

Metal Oxide ◽

Phosphonic Acid ◽

Sol Gel ◽

Transition Metal Oxide ◽

Metal Alkoxide ◽

Hydrolytic Condensation ◽

Metal Phosphonates ◽

Or Groups ◽

Sol Gel Process

AbstractTransition metal oxide / phenylphosphonate hybrids with M/P ratios ranging from 1 to 5, (M= Ti, Zr) and metal phosphonates (M/P = 0.5) have been prepared by a sol-gel process involving in a first step the non-hydrolytic condensation between metal alkoxide and phosphonic acid leading to M-O-P bonds, followed by the hydrolysis-condensation of the remaining M-OR groups. The composition, texture and structure of the materials were investigated using EDX, TGA, XRD, IR and 31P NMR.

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Preparation of macroporous Li2ZrO3 monoliths via an epoxide-mediated sol–gel process accompanied by phase separation

Journal of Porous Materials ◽

10.1007/s10934-017-0373-6 ◽

2017 ◽

Vol 24 (5) ◽

pp. 1319-1326 ◽

Cited By ~ 1

Author(s):

Xingzhong Guo ◽

Li Ding ◽

Jing Ren ◽

Hui Yang

Keyword(s):

Phase Separation ◽

Sol Gel ◽

Sol Gel Process

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Iron(iii) oxyhydroxide and oxide monoliths with controlled multiscale porosity: synthesis and their adsorption performance

Journal of Materials Chemistry A ◽

10.1039/c8ta01691g ◽

2018 ◽

Vol 6 (19) ◽

pp. 9041-9048 ◽

Cited By ~ 10

Author(s):

Yosuke Hara ◽

Kazuyoshi Kanamori ◽

Kei Morisato ◽

Riichi Miyamoto ◽

Kazuki Nakanishi

Keyword(s):

Phase Separation ◽

Sol Gel ◽

Adsorption Performance ◽

Sol Gel Process

Iron(iii) oxyhydroxide and oxide monoliths with controlled multiscale porosity have been successfully fabricated via the sol–gel process accompanied by phase separation.

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Synthesis of hierarchically porous MnO/C composites via a sol–gel process followed by two-step combustion for lithium-ion batteries

New Journal of Chemistry ◽

10.1039/d0nj01538e ◽

2020 ◽

Vol 44 (28) ◽

pp. 12307-12316

Author(s):

Wei Liu ◽

Daoyan Feng ◽

Hui Yang ◽

Xingzhong Guo

Keyword(s):

Phase Separation ◽

Lithium Ion Batteries ◽

Sol Gel ◽

Lithium Ion ◽

Hierarchically Porous ◽

Sol Gel Process

Hierarchically porous MnO/C composites with interconnected macropores and co-continuous skeletons were fabricated via a sol–gel process combined with phase separation, followed by a two-step combustion.

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