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

Sammanfattning

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.

Nyckelord

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

Publicerad i

Chemistry - A European Journal
2014, volym: 20, nummer: 34, sidor: 10732-10736

SLU författare

• Seisenbaeva, Gulaim

  • Institutionen för kemi och bioteknologi, Sveriges lantbruksuniversitet
    

• Daniel, Geoffrey

  • Institutionen för skogens produkter, Sveriges lantbruksuniversitet
    

• Kessler, Vadim

  • Institutionen för kemi och bioteknologi, Sveriges lantbruksuniversitet
    

Globala målen (SDG)

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UKÄ forskningsämne

Materialkemi
Oorganisk kemi
Fysikalisk kemi

Publikationens identifierare

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

Permanent länk till denna sida (URI)

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