Journal
CHEMSUSCHEM
Volume 9, Issue 20, Pages 2933-2938Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201600289
Keywords
carbon dioxide reduction; copper(I) iodide; electron transfer; photocatalysis; p-type semiconductors
Funding
- Foundation for Polish Science - EU European Regional Development Fund [VENTURES/2011-8/1, TEAM/2012-9/4]
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A p-type semiconductor, CuI, has been synthesized, characterized, and tested as a photocatalyst for CO2 reduction under UV/Vis irradiation in presence of isopropanol as a hole scavenger. Formation of CO, CH4, and/or HCOOH was observed. The photocatalytic activity of CuI was attributed to the very low potential of the conduction band edge (i.e., -2.28V vs. NHE). Photocurrents generated by the studied material confirm a high efficiency of the photoinduced interfacial electrontransfer processes. Our studies show that p-type semiconductors may be effective photocatalysts for CO2 reduction, even better than extensively studied n-type titanium dioxide, owing to the low potential of the conduction band edge.
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