Hierarchical Top-Porous/Bottom-Tubular
TiO<sub>2</sub> Nanostructures Decorated with Pd Nanoparticles for
Efficient Photoelectrocatalytic
Decomposition of Synergistic Pollutants
Zhonghai Zhang
Yanjie Yu
Peng Wang
10.1021/am201630s.s001
https://acs.figshare.com/articles/journal_contribution/Hierarchical_Top_Porous_Bottom_Tubular_TiO_sub_2_sub_Nanostructures_Decorated_with_Pd_Nanoparticles_for_Efficient_Photoelectrocatalytic_Decomposition_of_Synergistic_Pollutants/2547526
In this paper, top-porous and bottom-tubular TiO<sub>2</sub> nanotubes
(TiO<sub>2</sub> NTs) loaded with palladium nanoparticles (Pd/TiO<sub>2</sub> NTs) were fabricated as an electrode for an enhanced photoelectrocatalytic
(PEC) activity toward organic dye decomposition. TiO<sub>2</sub> NTs
with a unique hierarchical top-porous and bottom-tubular structure
were prepared by a facile two-step anodization method and Pd nanoparticles
were decorated onto the TiO<sub>2</sub> NTs via a photoreduction process.
The PEC activity of Pd/TiO<sub>2</sub> NTs was investigated by decomposition
of methylene blue (MB) and Rhodamine B (RhB). Because of formation
Schottky junctions between TiO<sub>2</sub> and Pd, which significantly
promoted the electron transfer and reduced the recombination of photogenerated
electrons and holes, the Pd/TiO<sub>2</sub> NT electrode showed significantly
higher PEC activities than TiO<sub>2</sub> NTs. Interestingly, an
obvious synergy between two dyes was observed and corresponding mechanism
based on facilitated transfer of electrons and holes as a result of
a suitable energy level alignment was suggested. The findings of this
work provide a fundamental insight not only into the fabrication but
also utility of Schottky junctions for enhanced environmental remediation
processes.
2016-02-22 05:09:19
formation Schottky junctions
PEC activity
palladium nanoparticles
dye decomposition
electron transfer
PEC activities
Rhodamine B
energy level alignment
photogenerated electrons
remediation processes
Schottky junctions
photoreduction process
Pd Nanoparticles
MB
TiO 2
anodization method
Synergistic PollutantsIn
TiO 2 NTs
Efficient Photoelectrocatalytic Decomposition
Pd nanoparticles