Photocatalytic activity of anatase–nickel ferrite heterostructures. Issue 4 (20th January 2015)

• Record Type: Journal Article
• Authors: Šutka, Andris; Millers, Martins; Döbelin, Nicola; Pärna, Rainer; Vanags, Martins; Maiorov, Mihael; Kleperis, Janis; Käämbre, Tanel; Joost, Urmas; Nõmmiste, Ergo; Kisand, Vambola; Knite, Maris
• Is Part Of: Physica status solidi. Volume 212:Issue 4(2015:Apr.)
• Page Start: 796
• Page End: 803
• Publication Date: 2015-01-20
• Subjects: Solid state physics -- Periodicals; Solids -- Industrial applications -- Periodicals; 530.41
• DOI: 10.1002/pssa.201431681
• Languages: English
• ISSNs: 1862-6300

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="pssa201431681-sec-0001" sec-type="section"> <p>The simple co‐precipitation route was used to couple commercial TiO₂ anatase nanopowder with nickel ferrite (NiFe₂O₄). The morphology and the crystalline structure of composite nanoparticles were characterised by TEM, N₂ adsorption‐desorption, XRD and Rietveld refinement, XPS and XAS. The optical and magnetic properties were investigated. After co‐precipitation NiFe₂O₄ nanoparticles, composed of spinel ferrite crystal phase, were formed on the surface of TiO₂ anatase nanopowder. The TiO₂/NiFe₂O₄ composite oxide demonstrated large specific surface area, high visible light absorption efficiency and efficient charge carrier separation, compared to pristine anatase TiO₂ or pristine NiFe₂O₄, representatively. The obtained TiO₂/NiFe₂O₄ composite oxides, with different nickel ferrite contents (5, 10, 25, 50 and 75 wt%) showed decent visible light photocatalytic efficiency, up to three times higher than pure anatase or pure NiFe₂O₄. However, TiO₂/NiFe₂O₄ composite oxides did not demonstrate high magnetic properties.</p> </sec> </abstract>