Reference : Study of the effect of a silver nanoparticle seeding layer on the crystallisation tem...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
http://hdl.handle.net/2268/140305
Study of the effect of a silver nanoparticle seeding layer on the crystallisation temperature, photoinduced hydrophylic and catalytic properties of TiO 2 thin films deposited on glass by magnetron sputtering
English
Limage, H. [Research Centre for the Physics of Matter and Radiation (PMR-LARN), University of Namur (FUNDP), 61 rue de Bruxelles, B-5000 Namur, Belgium]
Tichelaar, F. D. [National Centre for HRTEM, Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, Netherlands]
Closset, Raphaël [Université de Liège - ULiège > Département de chimie (sciences) > Département de chimie (sciences) >]
DELVAUX, Sophie [> > lcis-greenmat > >]
Cloots, Rudi [Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT >]
Lucas, S. [Research Centre for the Physics of Matter and Radiation (PMR-LARN), University of Namur (FUNDP), 61 rue de Bruxelles, B-5000 Namur, Belgium]
2011
Surface and Coatings Technology
Elsevier Science
205
13-14
3774-3778
Yes (verified by ORBi)
0257-8972
Lausanne
Switzerland
[en] Crystallization ; Magnetron sputtering ; Photocatalysis ; Self-cleaning ; Silver nanoparticles ; TiO 2 ; Acid degradation ; Anatase structures ; Catalytic properties ; Crystalline phase ; Crystallisation ; Electron hole recombination rate ; Film structure ; Gasphase ; High pressure discharge ; Hydrophilic conversion ; Hydrophylic ; Magnetron deposition ; Noble metals ; Oxide mode ; Photo-induced ; Photocatalytic activities ; Positive effects ; Research areas ; Seeding layers ; Surface hydrophilicity ; TEM ; TiO ; Two-step process ; UV illuminations ; XRD ; Cleaning ; Hydrophilicity ; Nanoparticles ; Organic polymers ; Palmitic acid ; Precious metals ; Thin films ; Titanium dioxide ; Vapor deposition ; Silver
[en] The optimization of the photocatalytic activity and hydrophilic conversion of TiO 2 is an active research area in the field of self-cleaning materials and energy storage/conversion. One major focus is the crystalline phase of TiO 2, known to be the most efficient of the anatase structures. Another issue is the decoration of TiO 2 with noble metals, which act as charge carrier traps for electrons. The latter hinders or reduces the electron-hole recombination rate and often leads to a more efficient photocatalytic activity. In this paper, we describe how an interlayer consisting of 3-4nm silver nanoparticles (Ag-NPs) promotes TiO 2 anatase crystallisation and has a positive effect on the photoinduced catalytic and hydrophylic properties of TiO 2 thin films. Ag-NPs and TiO 2 were deposited by magnetron sputtering in the same reactor in a two-step process: a) condensation of Ag-NPs produced in the gas phase thanks to a high-pressure discharge, and b) conventional TiO 2 magnetron deposition in oxide mode. Four temperatures from RT to 288°C were investigated and film thickness was 80nm. Particle size and film structure were determined by TEM, HRTEM and XRD. Photocatalytic activities of the samples were tracked by the evaluation of the surface hydrophilicity after UV illumination and 24. hours post-illumination, and by UV-induced palmitic acid degradation. © 2011.
http://hdl.handle.net/2268/140305
10.1016/j.surfcoat.2011.01.022

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