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Deposition of nanostructured photocatalytic zinc ferrite films using solution precursor plasma spraying
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2012 (English)In: Materials Research Bulletin, Vol. 47, no 3, 562-570 p.Article in journal (Refereed) Published
Abstract [en]

Deposition of pure spinel phase, photocatalytic zinc ferrite films on SS-304 substrates by solution precursor plasma spraying (SPPS) has been demonstrated for the first time. Deposition parameters such as precursor solution pH, concentration, film thickness, plasma power and gun-substrate distance were found to control physico-chemical properties of the film, with respect to their crystallinity, phase purity, and morphology. Alkaline precursor conditions (7 < pH ≤ 10) were found to favor oxide film formation. The nanostructured films produced under optimized conditions, with 500 mM solution at pH ∼ 8.0, yielded pure cubic phase ZnFe 2O 4 film. Very high/low precursor concentrations yielded mixed phase, less adherent, and highly inhomogeneous thin films. Desired spinel phase was achieved in as-deposited condition under appropriately controlled spray conditions and exhibited a band gap of ∼1.9 eV. The highly porous nature of the films favored its photocatalytic performance as indicated by methylene blue de-coloration under solar radiation. These immobilized films display good potential for visible light photocatalytic applications. © 2012 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
2012. Vol. 47, no 3, 562-570 p.
Keyword [en]
A. Electronic Materials, A. Nanostructures, B. Plasma Deposition, Crystallinities, Cubic phase, Deposition Parameters, Electronic materials, Film formations, Inhomogeneous thin films, Methylene Blue, Mixed phase, Nano-structured, Nanostructured Films, Optimized conditions, Phase purity, Photo-catalytic, Photocatalytic application, Photocatalytic performance, Physicochemical property, Plasma power, Porous nature, Precursor concentration, Precursor solutions, Solution precursor, Spinel phase, Spray conditions, Visible light, Zinc-ferrite films, Alkalinity, Oxide films, pH, Pinch effect, Plasma jets, Plasma spraying, Substrates, Sun, Zinc compounds, Plasma deposition
URN: urn:nbn:se:hv:diva-8441ISBN: 00255408 (ISSN)OAI: diva2:859969
Available from: 2015-10-09 Created: 2015-10-08 Last updated: 2015-10-09Bibliographically approved

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Joshi, S. V.

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