Carrillo, Adela I. , Serrano, Elena , SERRANO RUIZ, JUAN CARLOS, Luque, Rafael , Garcia-Martinez, Javier
Si
Appl. Catal. A-Gen.
Article
Científica
3.41
1.573
05/09/2012
000307153200001
Helical mesoporous silicas containing aluminium or cerium into their framework have been synthesized via hydrothermal method. The synthesized materials were extensively characterized to understand their physico-chemical properties in view of their future catalytic applications. Low-angle powder XRD patterns of calcined samples showed a hexagonally ordered mesopore structure. NMR spectra of aluminium materials exhibited two signals at 50 and 0 ppm assigned to tetracoordinated and octahedrally coordinated Al3+. DR-UV-vis and XPS spectrum of cerium content materials show that cerium was incorporated as Ce3+ and Ce4+ into the helical mesoporous material. Materials with molar ratios Si/Al = 95 and Si/Ce = 500 were found to be catalytically active in acid (oxathioacetalisations and alkylations) or redox (epoxidation of cyclohexene) catalyzed processes, respectively. (c) 2012 Elsevier B.V. All rights reserved.
Helical mesoporous material; Oxathioacetalisation; Oxidation; Hydrothermal; Aluminium; Cerium