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Pt‐V 2 O 5 /NT and Pt‐WO 3 /NT Titanate Nanotubes with Strong Photocatalytic Activity under Visible Light
Author(s) -
Camposeco Roberto,
Castillo Salvador,
HinojosaReyes Mariana,
RodriguezGonzalez Vicente,
Nava Noel,
MejíaCenteno Isidro
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201803163
Subject(s) - photocatalysis , rhodamine b , x ray photoelectron spectroscopy , materials science , visible spectrum , titanate , irradiation , nuclear chemistry , photochemistry , catalysis , chemical engineering , chemistry , organic chemistry , ceramic , physics , optoelectronics , nuclear physics , engineering , composite material
Photocatalytic degradation of Rhodamine B was carried out by decorated V 2 O 5 /NT and WO 3 /NT titanate nanotubes with Pt (0.3 wt. %) under visible light irradiation. The effect of parameters such as titanic acid phase, surface area and photocatalyst load on the deactivation of the photocatalytic degradation of Rhodamine B were studied. Photoatalysts were characterized by S BET , XRD, UV‐vis, XPS, HR‐TEM, and H 2 ‐TPR. We found that Pt‐WO 3 /NT photocatalyst reached 90% of dye degradation in 60 min. WO 3 /NT reached 60% after 90 min under 450‐nm visible light irradiation and pH neutral. The incorporation Pt nanoparticles into WO 3 /NT and V 2 O 5 /NT supports increased remarkably the photocatalytic activity during degradation of Rhodamine B. After reaction, an evolution from VO 2 to V 2 O 5 was observed. We also found the transition from W 5+ to W 6+ . The transition from Pt 0 to Pt 2+ was also observed. We concluded that the presence of Pt hinders the oxidation of the oxygen species on the surface of the titanate nanotubes.