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Article Dans Une Revue Advances in Nanoparticles Année : 2017

Boosted Photoactivity of Titania Nanotube Layers Doped with a Suspension of Gold Nanoparticles

Résumé

In the present work, we report on the behavior of synthesized gold nanopar-ticles suspension, incorporated in titanium dioxide nanotube layers (TiO 2-NT) and fabricated by electrochemical anodization in 0.4 wt% hydrofluoric acid solution and we study its photocatalytic response. Gold nanoparticles were characterized using Transmission electron microscopy and X-ray dif-fraction. Scanning electron microscopy was used to study the morphology of TiO 2 nanotube layers doped by gold nanoparticles. Boosted photocatalytic performances on the degradation of an azo dye were obtained by using TiO 2 nanotube layers doped by gold nanoparticles (Au/TiO 2-NT), compared to undoped TiO 2 nanotube layer (TiO 2-NT) catalysts. Under UV irradiation, this new nanomaterial, with noble metal-semi conductor heterojunction (Au/ TiO 2-NT) exhibits a synergetic effect in accelerating the electron transfert, resulting in an enhanced photoactivity recorded in the kinetics of degradation of Acid Orange 7 (AO7). Chronoamperometry was used to highlight higher photocurrent produced by gold-titania interface submited to UV irradiation .

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Chimie
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Dates et versions

hal-01829443 , version 1 (04-07-2018)

Identifiants

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Christophe Massard, Sébastien Pairis, Yves Sibaud, Christelle Blavignac, Oscar Komla Awitor. Boosted Photoactivity of Titania Nanotube Layers Doped with a Suspension of Gold Nanoparticles. Advances in Nanoparticles, 2017, 6 (3), pp.78261. ⟨10.4236/anp.2017.63010⟩. ⟨hal-01829443⟩
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