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An Easy Way To Prepare Monolithic Inorganic Oxide Aerogels
Author(s) -
Ren Lili,
Cui Sumin,
Cao Fengchao,
Guo Qinghui
Publication year - 2014
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201406387
Subject(s) - aerogel , sublimation (psychology) , materials science , supercritical drying , supercritical fluid , oxide , nanotechnology , porosity , solvent , chemical engineering , organic chemistry , composite material , chemistry , metallurgy , psychology , engineering , psychotherapist
Inorganic oxide aerogels have unique thermal, optical, electrical, magnetic, and chemical properties, which result in them potentially having a broad range of applications. However, their preparation is commonly based on a supercritical drying method, which greatly limits real applications of aerogels and their commercialization. Here we demonstrate a general method for drying wet gels to form aerogels that is based on the sublimation of organic solvent. The organic solvent must have a low surface tension, undergo sublimation easily, and have a high freezing point to allow the rapid synthesis of monolithic inorganic oxide aerogels under vacuum conditions. This cost‐effective process will facilitate application of aerogel materials. This approach may also be used for the preparation of other porous materials, whose theoretical and practical applications should be investigated.