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Title: Characterization of physicochemical properties of Pd/TiO{sub 2} nanostructured catalysts prepared by the photodeposition method

In this work, the sol–gel and hydrothermal methods were used to synthesize TiO{sub 2}-nanostructured supports. The palladium supported on sol–gel TiO{sub 2} and on hydrothermal-method-TiO{sub 2} nanotubes was obtained by incorporating it through photodeposition. The characterization was performed by X-ray diffraction, transmission electron microscopy, N{sub 2} physisorption, pulse chemisorption, ultraviolet–visible absorption spectroscopy and X-ray photoelectron spectroscopy. Both sol–gel-palladium–TiO{sub 2} and palladium-nanotube samples showed different palladium dispersion and physicochemical properties. In the palladium-nanotube sample, high surface area (243 m{sup 2}/g), H{sub 2}Ti{sub 3}O{sub 7} stable phase, and low band gap energy (2.35 eV) were obtained. Palladium-nanotubes and palladium-TiO{sub 2}, used as reference samples, were prepared by wet impregnation. - Highlights: • The precursors of TiO{sub 2} nanotubes were synthesized by the sol–gel method. • TiO{sub 2} nanostructures showed improved textural and morphological properties. • Pd nanoparticles around 1 nm were obtained by the photodeposition method. • TiO{sub 2}-nanotube-based catalysts can be a powerful tool for facing air pollution.
Authors:
 [1] ;  [2] ;  [1] ;  [2] ; ; ;  [1]
  1. Molecular Engineering Program, Instituto Mexicano del Petróleo, 07730 México, D.F. (Mexico)
  2. (Mexico)
Publication Date:
OSTI Identifier:
22403548
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Characterization; Journal Volume: 95; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION SPECTROSCOPY; CATALYSTS; CHEMISORPTION; HYDROTHERMAL SYNTHESIS; NANOPARTICLES; NANOTUBES; PALLADIUM; PRECURSOR; SOL-GEL PROCESS; SURFACE AREA; TITANIUM OXIDES; TRANSMISSION ELECTRON MICROSCOPY; ULTRAVIOLET RADIATION; X-RAY DIFFRACTION; X-RAY PHOTOELECTRON SPECTROSCOPY