TY - JOUR
T1 - Sonochemical synthesis of mesoporous transition metal and rare earth oxides
AU - Wang, Yanqin
AU - Yin, Lunxiang
AU - Gedanken, Arahon
PY - 2002/11
Y1 - 2002/11
N2 - Straight-extended layered mesostructures based on transition metal (Fe, Cr) and rare earth (Y, Ce, La, Sm, Er) oxides are synthesized by sonication for 3 h. After a longer period of sonication (6 h), hexagonal mesostructures based on Y- and Er-oxides are obtained. The surface areas of the Y-based hexagonal mesophases before and after extraction are 46.5, 256 m2/g, respectively. For Er-based hexagonal mesophases, the surface areas before and after extraction are 157 and 225 m2/g. The pore sizes after extraction are 5.0 and 2.2 nm for Y- and Er-based mesophases, respectively. Hexagonal mesostructures are also obtained for Zr-based material after sonication for 3 h and the hexagonal structure is still maintained after calcinations at 400°C for 4 h, although the surface area is only 35 m2/g.
AB - Straight-extended layered mesostructures based on transition metal (Fe, Cr) and rare earth (Y, Ce, La, Sm, Er) oxides are synthesized by sonication for 3 h. After a longer period of sonication (6 h), hexagonal mesostructures based on Y- and Er-oxides are obtained. The surface areas of the Y-based hexagonal mesophases before and after extraction are 46.5, 256 m2/g, respectively. For Er-based hexagonal mesophases, the surface areas before and after extraction are 157 and 225 m2/g. The pore sizes after extraction are 5.0 and 2.2 nm for Y- and Er-based mesophases, respectively. Hexagonal mesostructures are also obtained for Zr-based material after sonication for 3 h and the hexagonal structure is still maintained after calcinations at 400°C for 4 h, although the surface area is only 35 m2/g.
KW - Hexagonal structure
KW - Layered structure
KW - Mesophases
KW - Sonication
UR - http://www.scopus.com/inward/record.url?scp=0036847485&partnerID=8YFLogxK
U2 - 10.1016/s1350-4177(02)00090-1
DO - 10.1016/s1350-4177(02)00090-1
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C2 - 12404792
AN - SCOPUS:0036847485
SN - 1350-4177
VL - 9
SP - 285
EP - 290
JO - Ultrasonics Sonochemistry
JF - Ultrasonics Sonochemistry
IS - 6
ER -