Title Helical Al- and Ce-MCM-41 materials as novel catalyst for acid and redox processes
Authors Carrillo, Adela I. , Serrano, Elena , SERRANO RUIZ, JUAN CARLOS, Luque, Rafael , Garcia-Martinez, Javier
External publication Si
Means Appl. Catal. A-Gen.
Scope Article
Nature Científica
JCR Quartile 1
SJR Quartile 1
JCR Impact 3.41000
SJR Impact 1.57300
Publication date 05/09/2012
ISI 000307153200001
DOI 10.1016/j.apcata.2012.05.022
Abstract 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.
Keywords Helical mesoporous material; Oxathioacetalisation; Oxidation; Hydrothermal; Aluminium; Cerium
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