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Research article2014Peer reviewed

General Facile Approach to Transition-Metal Oxides with Highly Uniform Mesoporosity and Their Application as Adsorbents for Heavy-Metal-Ion Sequestration

Seisenbaeva, Gulaim; Daniel, Geoffrey; Kessler, Vadim; Nedelec, Jean-Marie

Abstract

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 Cr-VI 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.

Keywords

mesoporous oxides; nanostructures; sorption mechanism; thermohydrolysis; transition metals

Published in

Chemistry - A European Journal
2014, Volume: 20, number: 34, pages: 10732-10736

      SLU Authors

    • Seisenbaeva, Gulaim

      • The Department of Chemistry and Biotechnology, Swedish University of Agricultural Sciences
      • Daniel, Geoffrey

        • Department of Forest Products, Swedish University of Agricultural Sciences
        • Kessler, Vadim

          • The Department of Chemistry and Biotechnology, Swedish University of Agricultural Sciences

        Sustainable Development Goals

        Ensure availability and sustainable management of water and sanitation for all

        UKÄ Subject classification

        Materials Chemistry
        Inorganic Chemistry
        Physical Chemistry

        Publication identifier

        DOI: https://doi.org/10.1002/chem.201402691

        Permanent link to this page (URI)

        https://res.slu.se/id/publ/61916