Journal
APPLIED SURFACE SCIENCE
Volume 541, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2020.148457
Keywords
Surface plasmon resonance; Z-scheme charge migration; Photocatalytic hydrogen production; Sunlight-assisted combustion; Lavender extract; High aspect ratio
Categories
Funding
- Deanship of Scientific Research (DSR) at King Fahd University of Petroleum & Minerals (KFUPM) [DF181021]
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This study successfully combines surface plasmon resonance and Z-scheme charge transport in a single photocatalyst (Ag ZnO CeO2 heterostructure), resulting in enhanced photocatalytic activity for H-2 production under simulated sunlight irradiation.
Rational design of photocatalyst with wide solar-spectrum absorption, negligible electron-hole recombination, and maximized redox potential is an essential prerequisite for achieving commercial-scale photocatalytic H-2 production. This contribution combines surface plasmon resonance and Z-scheme charge transport in a single photocatalyst (Ag ZnO CeO2 hetemstructure) aiming to improve its performance for photocatalytic H-2 production. The Ag-ZnO-CeO2 heterostructure is fabricated via sunlight-driven combustion and deposition approaches. The successful construction is confirmed by several characterization techniques. The Z-scheme configuration is verified by in situ irradiated XPS and ESR analyses. Ag plays dual rules as an electron mediator to facilitate the Z-scheme charge transport and plasmonic material to maximize the light absorption in the visible region. The designed photocatalyst exhibits significantly enhanced photocatalytic activity for H-2 production (18345 mu mol h(-1) g(-1)) under simulated sunlight irradiation. This work offers the opportunity of constructing efficient Z-scheme photocatalyst from wide bandgap semiconductors with full-visible light response, suppressed electronhole recombination, and optimized redox potential.
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