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Reza Salimi, A. A. Sabbagh Alvani, Bastian Timo Mei, N. Naseri, Shangfeng Du, Guido Mul
Research output: Contribution to journal › Article › peer-review
Ag-Functionalized CuWO4/WO3 heterostructures were successfully prepared via a polyvinyl pyrrolidone (PVP)-assisted sol-gel (PSG) route. Thin films prepared via electrophoretic deposition were used as photoanodes for photoelectrochemical (PEC) water splitting. Compared to pristine CuWO4 and WO3 films, a significant enhancement of the photocurrent (3-4 times) at the thermodynamic potential for oxygen evolution (0.62 V vs. Ag/AgCl, pH 7) was obtained for the Ag-functionalized CuWO4/WO3 photoanodes. The obtained enhancement is shown to be derived from a synergic contribution of heterostructure formation (CuWO4/WO3) and improvements of light utilization by Ag-induced surface plasmon resonance (SPR) effects. Accordingly, a photocurrent of 0.205 mA cm-2 at 0.62 V vs. Ag/AgCl under neutral conditions (without hole scavengers) under front-side simulated AM1.5G illumination was achieved. A detailed analysis of the obtained PEC data alongside performed impedance measurements suggests that charge seperation is significantly improved for the prepared Ag-functionalized CuWO4/WO3 photoanodes. Our work offers beneficial insights to design new plasmonic metal/heterostructured nanocomposites for energy conversion applications.
Original language | English |
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Pages (from-to) | 2196-2203 |
Number of pages | 8 |
Journal | New Journal of Chemistry |
Volume | 43 |
Issue number | 5 |
Early online date | 26 Dec 2018 |
DOIs | |
Publication status | Published - 2019 |
Research output: Contribution to journal › Article › peer-review