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Formation of Hierarchically Porous Metal Oxide and Metal Monoliths by Nanocasting into Silica Monoliths
Author(s) -
Smått JanHenrik,
Sayler Franchessa M.,
Grano Amy J.,
Bakker Martin G.
Publication year - 2012
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201100355
Subject(s) - monolith , materials science , porosity , chemical engineering , silver oxide , oxide , metal , metallurgy , composite material , chemistry , organic chemistry , engineering , catalysis
The formation of hierarchically porous metal and metal oxide monoliths by replication of hierarchically porous silica templates is reviewed. The various factors that impact the structure and properties of the synthesized materials are discussed and illustrated by the formation of new α‐Fe 2 O 3 , ZrO 2 , nickel, silver, and silver silicate porous monoliths. The impact of the atmosphere is addressed in the formation of Co 3 O 4 and silver monoliths. For Co 3 O 4 , formation of the monolith under vacuum, air, argon, or nitrogen was found to dramatically change the structure of the final material. For silver, decomposition of the silver nitrate under air resulted in porous monoliths composed of silver silicates. Decomposition of silver nitrate under vacuum produced monoliths for which the chemical composition of the monolith was predominantly silver on the exterior of the monolith consisted of silver silicates in the interior of the monolith.