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

SDG6 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