| Title: | Noble metal-modified faceted anatase titania photocatalysts: Octahedron versus decahedron |
| Authors: | Wei, Zhishun Browse this author |
| Janczarek, Marcin Browse this author |
| Endo, Maya Browse this author |
| Wang, Kunlei Browse this author |
| Balčytis, Armandas Browse this author |
| Nitta, Akio Browse this author |
| Méndez-Medrano, Maria G. Browse this author |
| Colbeau-Justin, Christophe Browse this author |
| Juodkazis, Saulius Browse this author →KAKEN DB |
| Ohtani, Bunsho Browse this author →KAKEN DB |
| Kowalska, Ewa Browse this author →ORCID |
| Keywords: | Noble metal |
| Faceted anatase titania |
| Octahedral anatase particle |
| Decahedral anatase particle |
| Plasmonic photocatalysis |
| 3D-FDTD simulations |
| Issue Date: | 5-Dec-2018 |
| Publisher: | Elsevier |
| Journal Title: | Applied Catalysis B: Environmental |
| Volume: | 237 |
| Start Page: | 574 |
| End Page: | 587 |
| Publisher DOI: | 10.1016/j.apcatb.2018.06.027 |
| Abstract: | Octahedral anatase particles (OAP, with eight equivalent {101} facets) and decahedral anatase particles (DAP, with two additional {001} facets) were modified with nanoparticles of noble metals (Au, Ag, Cu). The titania morphology, expressed by the presence of different arrangements of exposed crystal facets, played a key role in the photocatalytic properties of metal-modified faceted titania. In the UV/vis systems, two-faceted configuration of DAP was more favorable for the reaction efficiency than single-faceted OAP because of an efficient charge separation described by the transfer of electrons to {101} facets and holes to {001} facets. Time-resolved microwave conductivity (TRMC) and reversed double-beam photoacoustic spectroscopy (RDB-PAS) confirmed that distribution of electron traps (ET) and mobility of electrons were key-factors of photocatalytic activity. In contrast, metal-modified OAP samples had higher photocatalytic activity than metal-modified DAP and metal-modified commercial titania samples under visible light irradiation. This indicates that the presence of single type of facets ({101}) is favorable for efficient electron transfer via shallow ET, whereas intrinsic properties of DAP result in fast charge carriers’ recombination when gold is deposited on {101} facets (migration of “hot” electrons: Au→{101}→Au). |
| Rights: | © 2018 Zhishun Wei, Marcin Janczarek, Maya Endo, Kunlei Wang, Armandas Balčytis, Akio Nitta, Maria G. Méndez-Medrano, Christophe Colbeau-Justin, Saulius Juodkazis, Bunsho Ohtani, and Ewa Kowalska |
| https://creativecommons.org/licenses/by/4.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/70812 |
| Appears in Collections: | 触媒科学研究所 (Institute for Catalysis) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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