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Up-conversion luminescence coupled to plasmonic gold nanorods for light harvesting and hydrogen production.

Abstract

The conversion of infra-red to visible-light, the so called “up-conversion luminescence”, and its use for H2 production allowing for a larger fraction of sun light on earth to be used is one of the most important light harvesting aims. We have prepared, characterized and tested a tri-functional material composed of an up-converter (NaYF4-Yb-Tm), plasmonic gold nanorods (Au NRs), and a CdS semiconductor. Tests with gas phase methanol/O2 resulted in the production of H2 and CO2 upon excitation with a 980 nm IR light. Equally important, these products were observed (although with a third of the value obtained by the ternary system) for the binary system (NaYF4-Yb-Tm/Au NRs); wihtout the CdS semiconductor. This is the first time that H2 was made photo-catalytically using plasmonic Au nanoparticles upon initial excitation with infra-red light and is attributed to the up-conversion process.

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Publication details

The article was received on 16 Oct 2017, accepted on 07 Nov 2017 and first published on 07 Nov 2017


Article type: Communication
DOI: 10.1039/C7CC07969A
Citation: Chem. Commun., 2017, Accepted Manuscript
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    Up-conversion luminescence coupled to plasmonic gold nanorods for light harvesting and hydrogen production.

    H. Alghamdi, K. Katsiev, A. Wahab, J. Llorca and H. Idriss, Chem. Commun., 2017, Accepted Manuscript , DOI: 10.1039/C7CC07969A

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