General facile approach to transition metal oxides with highly uniform mesoporosity and their application as adsorbents for heavy metal ion sequestration. - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Chemistry - A European Journal Année : 2014

General facile approach to transition metal oxides with highly uniform mesoporosity and their application as adsorbents for heavy metal ion sequestration.

Résumé

Mesoporous powders of transition-metal oxides, TiO2, ZrO2, HfO2, Nb2O5, and Ta2O5, pure from organic impurities were produced by a rapid single-step thermohydrolytic approach. The obtained materials display an impressively large active surface area and sharp pore-size distribution, being composed of partially coalesced uniform nanoparticles with crystalline cores and amorphous shells. They reveal extremely high adsorption capacity in removal of CrVI anions from solutions (25.8 for TiO2, 73.0 for ZrO2, and 74.7 mg g−1 for Nb2O5 in relation to the Cr2O72− anion), making them very attractive as adsorbents in water remediation applications. The difference in adsorption capacities for the studied oxides may be explained by variation in surface hydration and surface-charge distribution.

Domaines

Chimie

Dates et versions

hal-01080984 , version 1 (06-11-2014)

Identifiants

Citer

Gulaim A. Seisenbaeva, Geoffrey Daniel, Vadim G. Kessler, Jean-Marie Nedelec. General facile approach to transition metal oxides with highly uniform mesoporosity and their application as adsorbents for heavy metal ion sequestration.. Chemistry - A European Journal, 2014, 20, pp.10732-10736. ⟨10.1002/chem.201402691⟩. ⟨hal-01080984⟩
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