Hierarchical top-porous/bottom-tubular TiO 2 nanostructures decorated with Pd nanoparticles for efficient photoelectrocatalytic decomposition of synergistic pollutants
KAUST DepartmentBiological and Environmental Sciences and Engineering (BESE) Division
Environmental Nanotechnology Lab
Environmental Science and Engineering Program
Water Desalination and Reuse Research Center (WDRC)
Online Publication Date2012-01-24
Print Publication Date2012-02-22
Permanent link to this recordhttp://hdl.handle.net/10754/562098
MetadataShow full item record
AbstractIn this paper, top-porous and bottom-tubular TiO 2 nanotubes (TiO 2 NTs) loaded with palladium nanoparticles (Pd/TiO 2 NTs) were fabricated as an electrode for an enhanced photoelectrocatalytic (PEC) activity toward organic dye decomposition. TiO 2 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 2 NTs via a photoreduction process. The PEC activity of Pd/TiO 2 NTs was investigated by decomposition of methylene blue (MB) and Rhodamine B (RhB). Because of formation Schottky junctions between TiO 2 and Pd, which significantly promoted the electron transfer and reduced the recombination of photogenerated electrons and holes, the Pd/TiO 2 NT electrode showed significantly higher PEC activities than TiO 2 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. © 2012 American Chemical Society.
CitationZhang, Z., Yu, Y., & Wang, P. (2012). Hierarchical Top-Porous/Bottom-Tubular TiO2 Nanostructures Decorated with Pd Nanoparticles for Efficient Photoelectrocatalytic Decomposition of Synergistic Pollutants. ACS Applied Materials & Interfaces, 4(2), 990–996. doi:10.1021/am201630s
SponsorsThis work was supported by KAUST baseline fund. We thank Dr. Lan Zhao, Dr. Bei Zhang, and Dr. Mohamed Nejib Hedhili from King Abdullah University of Science and Technology (KAUST) for their help with SEM, XRD, and XPS, respectively. Z.Z acknowledges a Sabic Postdoctoral Fellowship.
PublisherAmerican Chemical Society (ACS)
- Electrochemically assisted photocatalytic degradation of 4-chlorophenol by ZnFe2O4-modified TiO2 nanotube array electrode under visible light irradiation.
- Authors: Hou Y, Li X, Zhao Q, Quan X, Chen G
- Issue date: 2010 Jul 1
- Influence of Ag-Au microstructure on the photoelectrocatalytic performance of TiO2 nanotube array photocatalysts.
- Authors: Wang Q, Wang X, Zhang M, Li G, Gao S, Li M, Zhang Y
- Issue date: 2016 Feb 1
- Photoelectrocatalytic degradation of organic pollutants via a CdS quantum dots enhanced TiO2 nanotube array electrode under visible light irradiation.
- Authors: Li G, Wu L, Li F, Xu P, Zhang D, Li H
- Issue date: 2013 Mar 7
- High-efficiency photoelectrocatalytic hydrogen generation enabled by palladium quantum dots-sensitized TiO2 nanotube arrays.
- Authors: Ye M, Gong J, Lai Y, Lin C, Lin Z
- Issue date: 2012 Sep 26
- TiO₂ Nanotubes/Ag/MoS₂ Meshy Photoelectrode with Excellent Photoelectrocatalytic Degradation Activity for Tetracycline Hydrochloride.
- Authors: Li T, Wang Z, Liu C, Tang C, Wang X, Ding G, Ding Y, Yang L
- Issue date: 2018 Aug 27