Issue 27, 2014

A facile exfoliation-crystal growth route to multicomponent Ag2CO3/Ag-Ti5NbO14 nanohybrids with improved visible light photocatalytic activity

Abstract

Multicomponent Ag2CO3/Ag-layered Ti5NbO14 nanohybrids are synthesized by the crystal growth of silver carbonate on the surface of exfoliated layered titanoniobate 2D nanosheets. In the obtained nanohybrids, the spherical Ag2CO3 nanoparticles with a size of 5–10 nm are immobilized on the surface of the titanoniobate nanosheets with partial formation of neutral Ag metal caused by electron transfer from anionic titanoniobate nanosheets to silver cations. An electronic coupling between Ag2CO3/Ag and Ti5NbO14 nanosheets leads to a remarkable enhancement of visible light absorption and a significant depression of electron–hole recombination. The present Ag2CO3/Ag-layered Ti5NbO14 nanohybrids show much higher visible light photocatalytic activity than the unhybridized Ag2CO3, underscoring the beneficial effect of hybridization with metal oxide nanosheets on the photocatalytic activity of silver oxosalts. Before and after the photoreaction, the crystal structure and crystal morphology of the Ag2CO3/Ag-layered Ti5NbO14 nanohybrids remain unchanged, highlighting the excellent photostability of these materials. All the present experimental findings clearly demonstrate the usefulness of the exfoliation-crystal growth method in exploring novel efficient visible light active photocatalysts.

Graphical abstract: A facile exfoliation-crystal growth route to multicomponent Ag2CO3/Ag-Ti5NbO14 nanohybrids with improved visible light photocatalytic activity

Supplementary files

Article information

Article type
Paper
Submitted
03 jan 2014
Accepted
24 mar 2014
First published
24 mar 2014

Dalton Trans., 2014,43, 10566-10573

Author version available

A facile exfoliation-crystal growth route to multicomponent Ag2CO3/Ag-Ti5NbO14 nanohybrids with improved visible light photocatalytic activity

S. Park, J. M. Lee, Y. K. Jo, I. Y. Kim and S. Hwang, Dalton Trans., 2014, 43, 10566 DOI: 10.1039/C4DT00018H

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