Abstract
Bi 2 Fe 4 O 9 nanocrystals with high active facets were controllably synthesized via a chemical co-precipitation process followed by a hydrothermal treatment at various microenvironment. The nanocrystals can be controlled preferentially to grow along (001) and show flat side facets of (110) and (10). The photoinduced charge-transfer property of Bi 2 Fe 4 O 9 was significantly improved. Such a high photo-to-current conversion efficiency is ascribed to the synergistic effect of energy band structure and the high reactivity of exposed (110) and (10) facets. The high surface energy at the interface of the Bi 2 Fe 4 O 9 efficiently reduced the recombination of photoinduced electron-hole pairs, and thus increasing the lifetime of charge carriers and enhancing the photo-to-current efficiency of the Bi 2 Fe 4 O 9 .
Highlights
Photoelectrochemical water splitting has attracted increasing interest over the past decades, because it is a very promising technology for converting solar energy into chemical energy and for developing environment technology
The development of the visible-light-driven photocatalysts for water splitting seems to be a promising way from the viewpoint of using solar energy
We have synthesized single-phase Bi2Fe4O9 nanocrystals through a facile chemical co-precipitation process and observed prompt, steady and significant photocurrent in the thin-film photoelectrodemade of Bi2Fe4O9 nanocrystals under visible-light irradiation, suggesting that Bi2Fe4O9 is a promising material for photoelectrode and solar energy conversion applications
Summary
Photoelectrochemical water splitting has attracted increasing interest over the past decades, because it is a very promising technology for converting solar energy into chemical energy and for developing environment technology. The development of the visible-light-driven photocatalysts for water splitting seems to be a promising way from the viewpoint of using solar energy. We have synthesized single-phase Bi2Fe4O9 nanocrystals through a facile chemical co-precipitation process and observed prompt, steady and significant photocurrent in the thin-film photoelectrodemade of Bi2Fe4O9 nanocrystals under visible-light irradiation, suggesting that Bi2Fe4O9 is a promising material for photoelectrode and solar energy conversion applications. Bi2Fe4O9 nanocrystals have been controllably synthesized via a chemical co-precipitation process followed by a hydrothermal synthesis through tuning the synthesis microenvironment. They exhibit high performance of photo-to-current conversion under visible-light
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