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Sandwich-like titania thin films with one/three-dimensional nanostructures for photocatalytic applications†
Ming-Zao Tang,Jin-Ming Wu
RSC Advances Pub Date : 05/07/2014 00:00:00 , DOI:10.1039/C4RA01806K
Abstract

This study attempts to construct a multi-layer titania with merits inherent from both one/three-dimensional nanostructures and phase junctions. A solution-based technique was adopted to fabricate a sandwich-like titania thin film with one/three-dimensional nanostructures. The film consisted of one-dimensional anatase/rutile nanorod arrays as the underlayer and three-dimensional rutile nanoflower arrays as the top layer, which were intercalated with a sol–gel anatase nanoparticulate layer. The surface morphology, phase composition and light absorption behavior were characterized in detail by field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD) pattern and UV-vis diffuse reflectance spectra (UV-vis DRS). When utilized to assist photodegradation of rhodamine B in water, the sandwich film possessed an efficiency significantly higher than the sum of those derived from three component films. The appropriate layer-by-layer alignment of nanostructured films is thus argued to be a feasible route to fabricate titania thin films with high photocatalytic activities.

Graphical abstract: Sandwich-like titania thin films with one/three-dimensional nanostructures for photocatalytic applications
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