Details
| Original language | English |
|---|---|
| Pages (from-to) | 5264-5273 |
| Number of pages | 10 |
| Journal | Physical Chemistry Chemical Physics |
| Volume | 20 |
| Issue number | 7 |
| Publication status | Published - 19 Jan 2018 |
Abstract
Cu nanoparticles were deposited on the surface of commercial TiO 2 nanoparticles (Cu-TiO 2) using different methods aiming at the production of highly efficient visible light photocatalysts. Photocatalytic H 2 evolution rates obtained from methanol/water mixtures revealed no significant influence of the presence of copper oxides on the photoreaction upon visible light illumination. The photocatalytic H 2 production rates were evaluated upon illumination with different spectral ranges (≥420 nm or ≥500 nm) and the results evidenced that the visible light induced charge carrier formation on the Cu-TiO 2 photocatalysts consists of two distinct pathways: the direct excitation of TiO 2 and the induced excitation by the so-called surface plasmon resonance (SPR) effect of the Cu nanoparticles on the TiO 2 surface. Both pathways are present when the full visible range of the spectrum is used (≥420 nm), while for illumination at longer wavelengths (≥500 nm), the photocatalytic activity is solely promoted by the Cu-SPR effect. Electron paramagnetic resonance (EPR) and laser flash photolysis measurements were performed to clarify the underlying mechanism of Cu-TiO 2 photocatalysts upon visible light illumination.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
- Chemistry(all)
- Physical and Theoretical Chemistry
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In: Physical Chemistry Chemical Physics, Vol. 20, No. 7, 19.01.2018, p. 5264-5273.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - New insights into the plasmonic enhancement for photocatalytic H2 production by Cu–TiO2 upon visible light illumination
AU - Nie, J.
AU - Patrocinio, A. O. T.
AU - Hamid, S.
AU - Sieland, F.
AU - Sann, J.
AU - Xia, S.
AU - Bahnemann, Detlef W.
AU - Schneider, Jenny
N1 - © the Owner Societies 2018
PY - 2018/1/19
Y1 - 2018/1/19
N2 - Cu nanoparticles were deposited on the surface of commercial TiO 2 nanoparticles (Cu-TiO 2) using different methods aiming at the production of highly efficient visible light photocatalysts. Photocatalytic H 2 evolution rates obtained from methanol/water mixtures revealed no significant influence of the presence of copper oxides on the photoreaction upon visible light illumination. The photocatalytic H 2 production rates were evaluated upon illumination with different spectral ranges (≥420 nm or ≥500 nm) and the results evidenced that the visible light induced charge carrier formation on the Cu-TiO 2 photocatalysts consists of two distinct pathways: the direct excitation of TiO 2 and the induced excitation by the so-called surface plasmon resonance (SPR) effect of the Cu nanoparticles on the TiO 2 surface. Both pathways are present when the full visible range of the spectrum is used (≥420 nm), while for illumination at longer wavelengths (≥500 nm), the photocatalytic activity is solely promoted by the Cu-SPR effect. Electron paramagnetic resonance (EPR) and laser flash photolysis measurements were performed to clarify the underlying mechanism of Cu-TiO 2 photocatalysts upon visible light illumination.
AB - Cu nanoparticles were deposited on the surface of commercial TiO 2 nanoparticles (Cu-TiO 2) using different methods aiming at the production of highly efficient visible light photocatalysts. Photocatalytic H 2 evolution rates obtained from methanol/water mixtures revealed no significant influence of the presence of copper oxides on the photoreaction upon visible light illumination. The photocatalytic H 2 production rates were evaluated upon illumination with different spectral ranges (≥420 nm or ≥500 nm) and the results evidenced that the visible light induced charge carrier formation on the Cu-TiO 2 photocatalysts consists of two distinct pathways: the direct excitation of TiO 2 and the induced excitation by the so-called surface plasmon resonance (SPR) effect of the Cu nanoparticles on the TiO 2 surface. Both pathways are present when the full visible range of the spectrum is used (≥420 nm), while for illumination at longer wavelengths (≥500 nm), the photocatalytic activity is solely promoted by the Cu-SPR effect. Electron paramagnetic resonance (EPR) and laser flash photolysis measurements were performed to clarify the underlying mechanism of Cu-TiO 2 photocatalysts upon visible light illumination.
UR - http://www.scopus.com/inward/record.url?scp=85042195706&partnerID=8YFLogxK
U2 - 10.1039/c7cp07762a
DO - 10.1039/c7cp07762a
M3 - Article
VL - 20
SP - 5264
EP - 5273
JO - Physical Chemistry Chemical Physics
JF - Physical Chemistry Chemical Physics
SN - 1463-9076
IS - 7
ER -