کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1489116 | 992300 | 2012 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Deposition of nanostructured photocatalytic zinc ferrite films using solution precursor plasma spraying Deposition of nanostructured photocatalytic zinc ferrite films using solution precursor plasma spraying](/preview/png/1489116.png)
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 ZnFe2O4 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.
Figure optionsDownload as PowerPoint slideHighlights
► Highly economic solution precursor route capable of producing films/coating even for mass scale production.
► Pure spinel phase ZnFe2O4 porous, immobilized films deposited in single step.
► Parameter optimization yields access to nanostructuring in SPPS method.
► The ecofriendly immobilized ferrite films were active under solar radiation.
► Such magnetic system display advantage w.r.t. recyclability after photocatalyst extraction.
Journal: Materials Research Bulletin - Volume 47, Issue 3, March 2012, Pages 562–570