El Instituto Politécnico Nacional
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http://repositoriodigital.ipn.mx/handle/123456789/11690| Título : | Preparation and characterization of multicomponent porous |
| Palabras clave : | Sol-gel SiO2-Al2O3-TiO2-NiO-MoO3 SiO2-ZrO2-TiO2-NiO-MoO3 porous materials |
| Fecha de publicación : | 16-ene-2013 |
| Editorial : | Journal of Porous Materials; Espringer |
| Descripción : | An experimental strategy was developed to obtain
transparent Si-Al-Ti-Ni-Mo and Si-Zr-Ti-Ni-Mo sols via the
sol-gel process. The solwas prepared from Si(OEt)4 (TEOS),
Al(OBus)3 (OBus: C2H5CH(CH3)O), Ti(OEt)4 (OEt:
OCH2CH3), Zr(OPrn)4 (OPrn:OCH2CH2CH3). In both cases
nickel nitrate hexahydrate (Ni(NO3)2 · 6H2O) and ammonium
heptamolybdate tetrahydrate ((NH4 )6Mo7O24 · 4H2O)
were the Ni and Mo sources, respectively. The sols were
characterized by Fourier Transform Infrared Spectroscopy
(FTIR). Assignments of the simultaneous formation of the
Si-O-Al, Si-O-Ti, Si-O-Ni, and Si-O-Zr bonds were done.
The sols were polymerized at room temperature (293 K) to
obtain gels, and these were dried at 423Kand calcined at 573,
853 and 893K in air. The characterization techniques used
were small-angle X-ray scattering (SAXS), X-ray diffraction
(XRD), scanning electron microscopy (SEM), and 29Si
Present address:
Facultad de Estudios Superiores Zaragoza, U.N.A.M., Batalla del 5 de
Mayo s/n esq. Fuerte de Loreto, Col. Ej´ercito de Oriente, M´exico D.
F., 09230, M´exico
E. Minor-P´erez ( ) · D. Quintana-Zavala
CICATA-IPN, Unidad Legaria, M´exico, D.F., 11500, Mexico
e-mail: mypes6@yahoo.com.mx
R. Mendoza-Serna
FES-Zaragoza, UNAM, M´exico, D.F., 09230, Mexico
J. M´endez-Vivar
Universidad Aut´onoma Metropolitana-Iztapalapa, Depto. de
Qu´ımica, A.P. 55-534, M´exico, D.F., 09340, Mexico
R. C. Pless
CICATA-IPN, Unidad Quer´etaro, Qro., 76040, Mexico
R. Torres-Robles
Instituto Mexicano del Petr´oleo, Programa de Ingenier´ıa
Molecular, M´exico D.F., 07730, Mexico
and 27Al magic angle spinning nuclear magnetic resonance
(MAS NMR). The density of the solidswas measured following
ASTM method D-4892 and the porosity and surface area
were determined byN2 adsorption/desorption isotherms. The
corresponding average pore diameters were evaluated using
the BJH, HK, and DA methods. Instituto Politecnio Nacional, UNAM-DGAPA |
| URI : | http://www.repositoriodigital.ipn.mx/handle/123456789/11690 |
| Otros identificadores : | J Porous Mater 1573-4854 http://hdl.handle.net/123456789/1213 |
| Aparece en las colecciones: | Doctorado |
Ficheros en este ítem:
| Fichero | Descripción | Tamaño | Formato | |
|---|---|---|---|---|
| J_Porous_Mat_13_2006_13_19.pdf | 289.28 kB | Adobe PDF | Visualizar/Abrir |
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