TY - JOUR
T1 - Atrane precursors in the one-pot surfactant-assisted synthesis of high zirconium content porous silicas
AU - El Haskouri, Jamal
AU - Cabrera Medina, Saúl Orlando
AU - Guillem, Carmen
AU - Latorre, Julio
AU - Beltrán, Aurelio
AU - Beltrán, Daniel
AU - Dolores Marcos, M.
AU - Amorós, Pedro
PY - 2002/12/1
Y1 - 2002/12/1
N2 - A diversity of zirconium-containing porous silicas of the MCM-41 type (Zr-MCM-41, ∞ ≥ Si/Zr ≥ 0.33) has been synthesized from aqueous solution using a cationic surfactant (CTABr = cetyltrimethylammonium bromide) as the structural directing agent, and starting from molecular atrane complexes of Zr and Si as precursors. Atrane inertness toward hydrolysis allows harmonization of the reactivity of the Zr and Si species, which in turn avoids subsequent phase segregation and results in chemically very homogeneous materials. Materials characterization by XRD, TEM, and N2 adsorption-desorption isotherms shows that all the prepared Zr-MCM-41 solids have high surface area and unimodal narrow pore size distribution, whereas their pore packing motives range from ordered hexagonal to wormhole-like arrays depending on the Zr content. The study of the local environment of the Zr atoms in these solids has been approached by means of spectroscopic techniques (IR, UV-vis, and NMR).
AB - A diversity of zirconium-containing porous silicas of the MCM-41 type (Zr-MCM-41, ∞ ≥ Si/Zr ≥ 0.33) has been synthesized from aqueous solution using a cationic surfactant (CTABr = cetyltrimethylammonium bromide) as the structural directing agent, and starting from molecular atrane complexes of Zr and Si as precursors. Atrane inertness toward hydrolysis allows harmonization of the reactivity of the Zr and Si species, which in turn avoids subsequent phase segregation and results in chemically very homogeneous materials. Materials characterization by XRD, TEM, and N2 adsorption-desorption isotherms shows that all the prepared Zr-MCM-41 solids have high surface area and unimodal narrow pore size distribution, whereas their pore packing motives range from ordered hexagonal to wormhole-like arrays depending on the Zr content. The study of the local environment of the Zr atoms in these solids has been approached by means of spectroscopic techniques (IR, UV-vis, and NMR).
UR - http://www.scopus.com/inward/record.url?scp=0036906667&partnerID=8YFLogxK
U2 - 10.1021/cm020131u
DO - 10.1021/cm020131u
M3 - Artículo
AN - SCOPUS:0036906667
VL - 14
SP - 5015
EP - 5022
JO - Chemistry of Materials
JF - Chemistry of Materials
SN - 0897-4756
IS - 12
ER -