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Author | Caretti, I.; Keulemans, M.; Verbruggen, S.W.; Lenaerts, S.; Van Doorslaer, S. | ||||
Title | Light-induced processes in plasmonic Gold/TiO2 photocatalysts studied by electron paramagnetic resonance | Type | A1 Journal article | ||
Year | 2015 | Publication | Topics in catalysis | Abbreviated Journal | Top Catal |
Volume | 58 | Issue | 12 | Pages | 776-782 |
Keywords | A1 Journal article; Sustainable Energy, Air and Water Technology (DuEL) | ||||
Abstract | X-band and W-band continuous-wave (CW) electron paramagnetic resonance (EPR) was used to study in situ light-induced (LI) mechanisms in commercial P90 titania (90 % anatase/10 % rutile) compared to plasmon-enhanced Au-P90 photocatalyst. These materials were excited using UV and 532 nm visible light to generate different excitation states and distinguish pure charge separation from plasmon-assisted resonance processes. Up to nine different photoinduced species of trapped electrons and holes were identified. LI CW EPR of P90 is presented for the first time, showing a UV excitation response similar to the well-known mixed-phase P25 titania. It is shown that incorporation of Au nanoparticles in Au-P90 and formation of a Schottky junction affects the charge separation state of the catalyst under UV light. Moreover, Au impregnation activated P90 through plasmon hot electron injection under visible light excitation (plasmonic sensitization effect). In general, EPR proved to be crucial to determine the different photoexciation paths and reactions that regulate plasmonic photocatalysis. | ||||
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Publisher | Place of Publication | Editor | |||
Language | Wos | 000360011200008 | Publication Date | 2015-08-03 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1022-5528 | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 2.486 | Times cited | 22 | Open Access | |
Notes | ; IC and SVD acknowledge the Research Foundation-Flanders (FWO) for financial support (Grant G.0687.13). SV thanks FWO for financial support through a postdoctoral fellowship and MK acknowledges the agency for Innovation by Science and Technology in Flanders (IWT) for financial support (Ph.D. Grant). ; | Approved | Most recent IF: 2.486; 2015 IF: 2.365 | ||
Call Number | UA @ admin @ c:irua:127413 | Serial | 5968 | ||
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