Correlation between palladium chemical state and photocatalytic performance of TiO2-Pd based nanoparticles
Journal
Thin Solid Films
Journal Volume
570
Journal Issue
PB
Pages
371-375
Date Issued
2014
Author(s)
Abstract
Photocatalytic processes can be used to illustrate both solar energy conversion and environmental friendly applications. In this study, we synthesize several titanium dioxide-palladium (TiO2-Pd) based catalysts by wet impregnation method plus hydrogen-thermal reduction process in order to develop high-effective photocatalysts that can be easily produced even in industrial quantities. Moreover, we examine the effects of hydrogen-thermal reduction process on the photocatalytic performance of TiO2-Pd based catalysts. From X-ray photoelectron spectroscopy analysis, increasing the hydrogen reduction process time results in the decreasing of palladium ion (Pd2 +) and palladium oxide (PdO), but it causes the increasing of palladium (Pd) metal. The hydrogen reduction process is helpful for the preparation of TiO2-Pd based catalysts with high photocatalytic decomposition of organic dyes (the apparent reaction rate constant ∼ 0.124 min- 1 under solar simulator irradiation) and excellent photocatalytic hydrogen production rate (∼ 26,000 μmol/g·h under UV-B irradiation). The TiO2-Pd based catalysts prepared in this study exhibit high photocatalytic performance. They are also industrially relevant especially when the low cost of Pd metal is taken into consideration. © 2014 Elsevier B.V.
Subjects
Photocatalytic hydrogen production; Photodegradation; TiO2 Photocatalyst; X-ray photoelectron spectroscopy
SDGs
Other Subjects
Costs; Hydrogen production; Irradiation; Oxide minerals; Photocatalysts; Photodegradation; Photoelectrons; Photons; Rate constants; Solar energy; Solar power generation; TiO2 nanoparticles; Titanium dioxide; X ray photoelectron spectroscopy; Environmental-friendly; Hydrogen reduction process; Photocatalytic decomposition; Photocatalytic hydrogen production; Photocatalytic performance; Solar simulator irradiation; TiO2 photocatalyst; Wet impregnation method; Palladium compounds
Type
journal article