Influence of microporosity of activated carbons as a support of polyoxometalates

H 3[PMo 12O 40] (PMo) was supported on four activated carbons (AC) in order to analyze the influence that the porous texture of AC exercises in the adsorption of PMo, trying to study where they are adsorbed and how their adsorption modifies the porous texture of AC. The amount of PMo adsorbed on AC...

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Published inMicroporous and mesoporous materials Vol. 115; no. 3; pp. 440 - 446
Main Authors Alcañiz-Monge, J., Trautwein, G., Parres-Esclapez, S., Maciá-Agulló, J.A.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier Inc 01.11.2008
Elsevier
Subjects
Activated carbons
Adsorbents
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Heteropolyacids
Microporosity
Polyoxometalate
Porous materials
Surface physical chemistry
Heteropolyacids
Polyoxometalate
Microporosity
Activated carbons
Crystalline phase
Correlation
Micropore
Support
X ray diffraction
Porous material
Texture
Heteropolyacid
Adsorption
Activated carbon
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Summary:H 3[PMo 12O 40] (PMo) was supported on four activated carbons (AC) in order to analyze the influence that the porous texture of AC exercises in the adsorption of PMo, trying to study where they are adsorbed and how their adsorption modifies the porous texture of AC. The amount of PMo adsorbed on AC follows a clear correlation with the porous texture, microporosity being the best evidence for this. Such a correlation indicates that PMo is only adsorbed in supermicroporosity as a consequence of the size of PMo, which limits the entrance on the smallest micropores, about 0.8 nm. XRD results indicate that the PMo is adsorbed on the micropore wall, that it is highly dispersed and that it does not develop any crystalline phase.
ISSN:1387-1811
1873-3093
DOI:10.1016/j.micromeso.2008.02.017