Structure and Photocatalytic Properties of TiO₂-WO₃Composites Prepared by Electrophoretic Deposition

Abstract

Abstract. In this work TiO 2 -WO 3 composite films containing different oxide concentrations were prepared by electrophoretic deposition on steel substrates. Composite coating structures were analyzed by X -ray diffraction, Raman spectra and scanning electron microscopy. The results showed an even distribution of WO 3 particles in the entire composite layer. Light absorption measurements were used for photocatalytic properties evaluation. It was found that the removal ratio of methylene blue depends on the (TiO 2 ):(WO 3 ) concentration ratio. The most effective photodegradation was determined for the sample that was electrophoretically deposited from the suspension with the molar content ratio n(TiO 2 ):n(WO 3 ) 2:1.

Nanostructured TiO2-based materials with photocatalytic properties

“…Photocatalytic measurements were carried out using methylene blue (MB) solution under UV irradiation [28]. Each sample was placed in 80 mL of 0.43 mg/L MB solution in a quartz beaker and illuminated with Hg lamp from 30 cm distance.…”

“…Lowering the band gap of TiO 2 can be done through creation of heterostructure with narrow gap materials or doping with various materials. It has been reported that WO 3 increase of absorption in VIS region as shown by various research papers [19,[24][25][26][27][28].…”

“…Band structure of TiO 2 /WO 3 heterosystem, optical absorption edge shift to VIS regionIn this chapter our research results on the role and properties of nanostructured TiO 2 -based materials with photocatalytic properties have been summarized based on publications[28].…”