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Open AccessFeature PaperArticle

Deposition of Visible Light Active Photocatalytic Bismuth Molybdate Thin Films by Reactive Magnetron Sputtering

1
Surface Engineering Group, School of Engineering, Manchester Metropolitan University, Manchester M1 5GD, UK
2
Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Faculty of Materials Science and Engineering, Hubei University, Wuhan 430062, China
*
Author to whom correspondence should be addressed.
Academic Editor: Klara Hernadi
Materials 2016, 9(2), 67; https://doi.org/10.3390/ma9020067
Received: 23 December 2015 / Revised: 13 January 2016 / Accepted: 15 January 2016 / Published: 22 January 2016
(This article belongs to the Special Issue Advancement of Photocatalytic Materials 2016)
Bismuth molybdate thin films were deposited by reactive magnetron co-sputtering from two metallic targets in an argon/oxygen atmosphere, reportedly for the first time. Energy dispersive X-ray spectroscopy (EDX) analysis showed that the ratio of bismuth to molybdenum in the coatings can be effectively controlled by varying the power applied to each target. Deposited coatings were annealed in air at 673 K for 30 min. The crystalline structure was assessed by means of Raman spectroscopy and X-ray diffraction (XRD). Oxidation state information was obtained by X-ray photoelectron spectroscopy (XPS). Photodegradation of organic dyes methylene blue and rhodamine B was used for evaluation of the photocatalytic properties of the coatings under a visible light source. The photocatalytic properties of the deposited coatings were then compared to a sample of commercial titanium dioxide-based photocatalytic product. The repeatability of the dye degradation reactions and photocatalytic coating reusability are discussed. It was found that coatings with a Bi:Mo ratio of approximately 2:1 exhibited the highest photocatalytic activity of the coatings studied; its efficacy in dye photodegradation significantly outperformed a sample of commercial photocatalytic coating. View Full-Text
Keywords: bismuth molybdate; photocatalytic coatings; magnetron sputtering; visible light; thin films bismuth molybdate; photocatalytic coatings; magnetron sputtering; visible light; thin films
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MDPI and ACS Style

Ratova, M.; Kelly, P.J.; West, G.T.; Xia, X.; Gao, Y. Deposition of Visible Light Active Photocatalytic Bismuth Molybdate Thin Films by Reactive Magnetron Sputtering. Materials 2016, 9, 67.

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