TY - DATA T1 - Hierarchical Top-Porous/Bottom-Tubular TiO2 Nanostructures Decorated with Pd Nanoparticles for Efficient Photoelectrocatalytic Decomposition of Synergistic Pollutants PY - 2016/02/22 AU - Zhonghai Zhang AU - Yanjie Yu AU - Peng Wang UR - 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 DO - 10.1021/am201630s.s001 L4 - https://ndownloader.figshare.com/files/4190584 KW - formation Schottky junctions KW - PEC activity KW - palladium nanoparticles KW - dye decomposition KW - electron transfer KW - PEC activities KW - Rhodamine B KW - energy level alignment KW - photogenerated electrons KW - remediation processes KW - Schottky junctions KW - photoreduction process KW - Pd Nanoparticles KW - MB KW - TiO 2 KW - anodization method KW - Synergistic PollutantsIn KW - TiO 2 NTs KW - Efficient Photoelectrocatalytic Decomposition KW - Pd nanoparticles N2 - In this paper, top-porous and bottom-tubular TiO2 nanotubes (TiO2 NTs) loaded with palladium nanoparticles (Pd/TiO2 NTs) were fabricated as an electrode for an enhanced photoelectrocatalytic (PEC) activity toward organic dye decomposition. TiO2 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 TiO2 NTs via a photoreduction process. The PEC activity of Pd/TiO2 NTs was investigated by decomposition of methylene blue (MB) and Rhodamine B (RhB). Because of formation Schottky junctions between TiO2 and Pd, which significantly promoted the electron transfer and reduced the recombination of photogenerated electrons and holes, the Pd/TiO2 NT electrode showed significantly higher PEC activities than TiO2 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. ER -