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

Jingsan Xu, Thomas J.K. Brenner, Zupeng Chen, Dieter Neher, Markus Antonietti, Menny Shalom

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Abstract

Herein, we report the use of upconversion agents to modify graphite carbon nitride (g-C3N4) by direct thermal condensation of a mixture of ErCl3·6H2O 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.

Original languageEnglish
Pages (from-to)16481-16486
Number of pages6
JournalACS applied materials & interfaces
Volume6
Issue number19
DOIs
StatePublished - 8 Oct 2014
Externally publishedYes

Keywords

  • RhB photodegradation
  • carbon nitride
  • metal-free photocatalysis
  • upconversion

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