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Upconversion-agent induced improvement of g-C3N4 photocatalyst under visible light

  • Herein, we report the use of upconversion agents to modify graphite carbon nitride (g-C3N4) by direct thermal condensation of a mixture of ErCl3 center dot 6H(2)O and the supramolecular precursor cyanuric acid-melamine. We show the enhancement of g-C3N4 photoactivity after Er3+ doping by monitoring the photodegradation of Rhodamine B dye under visible light. The contribution of the upconversion agent is demonstrated by measurements using only a red laser. The Er3+ doping alters both the electronic and the chemical properties of g-C3N4. The Er3+ doping reduces emission intensity and lifetime, indicating the formation of new, nonradiative deactivation pathways, probably involving charge-transfer processes.

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Metadaten
Author:Jingsan Xu, Thomas J. K. Brenner, Zupeng ChenORCiDGND, Dieter NeherORCiDGND, Markus AntoniettiORCiDGND, Menny Shalom
DOI:https://doi.org/10.1021/am5051263
ISSN:1944-8244 (print)
Pubmed Id:http://www.ncbi.nlm.nih.gov/pubmed?term=25238039
Parent Title (English):ACS applied materials & interfaces
Publisher:American Chemical Society
Place of publication:Washington
Document Type:Article
Language:English
Year of first Publication:2014
Year of Completion:2014
Release Date:2017/03/27
Tag:RhB photodegradation; carbon nitride; metal-free photocatalysis; upconversion
Volume:6
Issue:19
Pagenumber:6
First Page:16481
Last Page:16486
Funder:Minerva Fellowship; Helmholtz Energy Alliance ("Hybrid Photovoltaics")
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie
Peer Review:Referiert