A new protocol to synthesize size-controlled Au nanoparticles (NPs) loaded onto vertically aligned anatase TiO2 nanotubes arrays (TNTAs) prepared by electrochemical anodization is reported. Ligand-free Au NPs (<10 nm) were deposited onto anatase TNTAs supports, finely tuning the Au loading by controlling the immersion time of the support into metal vapor synthesis (MVS)-derived Au-acetone solutions. The Au/TNTAs composites were characterized by electron microscopies (SEM, (S)TEM), X-ray diffraction, X-ray photoelectron spectroscopy, and UV-vis spectroscopy. Their photocatalytic efficiency was evaluated in toluene degradation in air under ambient conditions without thermal or chemical postsynthetic treatments. The role of Au loadings was pointed out, obtaining a three times enhancement of the pristine anatase TNTAs activity with the best sample containing 3.3 μg Au cm-2.
|Titolo:||TiO2 Nanotubes Arrays Loaded with Ligand-Free Au Nanoparticles: Enhancement in Photocatalytic Activity|
|Autori interni:||DIAMANTI, MARIA VITTORIA|
|Data di pubblicazione:||2016|
|Rivista:||ACS APPLIED MATERIALS & INTERFACES|
|Appare nelle tipologie:||01.1 Articolo in Rivista|
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|ApplMatInterf2016.pdf||Articolo ACS ApplMatInt||3.79 MB||Adobe PDF||PDF editoriale||Accesso riservato|