Premium
Thermally Stable Nanocrystalline Mesoporous Gallium Oxide Phases
Author(s) -
Deshmane Chinmay A.,
Jasinski Jacek B.,
Carreon Moises A.
Publication year - 2009
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200900359
Subject(s) - mesoporous material , nanocrystalline material , gallium , chemistry , crystallinity , oxide , chemical engineering , spinel , ionic bonding , hydrothermal circulation , evaporation , nanotechnology , mineralogy , crystallography , materials science , ion , catalysis , organic chemistry , metallurgy , physics , thermodynamics , engineering
Semicrystalline and fully crystalline mesoporous galliumoxide phases were synthesized in the presence of ionic and non‐ionic structure directing agents via Evaporation‐Induced Self‐Assembly (EISA) and Self‐Assembly Hydrothermal‐Assisted (SAHA) methods respectively. EISA led to partially crystalline mesoporous gallium oxide phases displaying unimodal pore size distribution in the range of ca. 2–5 nm and surface areas as high as 300 m 2 /g. SAHA led to nanocrystalline mesoporous uniform micron‐sized gallium oxide spheres (ca. 0.3–6.5 μm) with narrow size distribution displaying cubic spinel type structure. These mesophases displayed surface areas as high as ca. 221 m 2 /g and unimodal pore size distribution in the 5–15 nm range. Textural properties such as surface areas and pore sizes were effectively fine‐tuned by the nature and relative concentration of the structure directing agents. Due to their high surface areas, tunability of pore sizes and the nature of the wall structure, these gallium oxide mesophases could find potential applications as heterogeneous catalysts.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)