Enhanced Photocatalytic Activity of Ultrathin Ba5Nb4O15 Two-Dimensional Nanosheets

Title
Enhanced Photocatalytic Activity of Ultrathin Ba5Nb4O15 Two-Dimensional Nanosheets
Authors
박상백송희조이찬우Sung Won Hwang조인선
Issue Date
2015-10
Publisher
ACS Applied Materials & Interfaces
Citation
VOL 7, NO 39-21867
Abstract
Anisotropic two-dimensional (2D) nanosheets of the layered perovskite, Ba5Nb4O15, with thicknesses of 5-10 nm and lateral sizes of 300-1200 nm, were synthesized by a hydrothermal route. The influences of the 2D morphology of the material on the crystal and electronic structures, light absorption properties, and photocatalytic activity were investigated. The ultrathin nanosheets showed much-enhanced photocatalytic activity compared to both thick nanosheets (similar to 30 nm) and micrometer-sized particles for the evolution of H-2 from water splitting under UV light illumination. This enhanced activity is predominantly attributed to the larger surface area, higher optical absorption, and charge separation ability of the 2D nanosheet, which results from the variation of the local crystal structure arising from the ultrathin morphology of the Ba5Nb4O15.
URI
http://pubs.kist.re.kr/handle/201004/71244
ISSN
1944-8244
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KIST Publication > Article
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