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Analysis of the atomic structure of monoclinic BiVO4 reveals its fascinating structure-related dual response to visible light and temperature. Although there have been a few reported studies of its responses to visible light and temperature, an understanding of the effects of quantum size, particle shape or specific exposed facets on its dual responsive properties remains elusive; this is primarily due to the limited availability of high-quality monodisperse nanocrystals with extremely small sizes and specific exposed facets. Herein, we describe a novel assembly-fusion strategy for the synthesis of mesostructured monoclinic BiVO4 quantum tubes with ultranarrow diameter of 5 nm, ultrathin wall thickness down to 1 nm and exposed {020} facets, via a convenient hydrothermal method at temperatures as low as 100 ℃. Notably, the resulting high-quality quantum tubes possess significantly superior dual-responsive properties compared with bulk BiVO4 or even BiVO4 nanoellipsoids, and thus, show high promise for applications as visible-light photocatalysts and temperature indicators offering improved environmental quality and safety. This mild and facile methodology should be capable of extension to the preparation of other mesostructured inorganic quantum tubes with similar characteristics, giving a range of materials with enhanced dual-responsive properties.


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Aqueous Synthesis of Mesostructured BiVO4 Quantum Tubes with Excellent Dual Response to Visible Light and Temperature

Show Author's information Yongfu SunYi Xie( )Changzheng WuShudong ZhangShishi Jiang
Hefei National Laboratory for Physical Sciences at MicroscaleUniversity of Science and Technology of ChinaHefei230026China

Abstract

Analysis of the atomic structure of monoclinic BiVO4 reveals its fascinating structure-related dual response to visible light and temperature. Although there have been a few reported studies of its responses to visible light and temperature, an understanding of the effects of quantum size, particle shape or specific exposed facets on its dual responsive properties remains elusive; this is primarily due to the limited availability of high-quality monodisperse nanocrystals with extremely small sizes and specific exposed facets. Herein, we describe a novel assembly-fusion strategy for the synthesis of mesostructured monoclinic BiVO4 quantum tubes with ultranarrow diameter of 5 nm, ultrathin wall thickness down to 1 nm and exposed {020} facets, via a convenient hydrothermal method at temperatures as low as 100 ℃. Notably, the resulting high-quality quantum tubes possess significantly superior dual-responsive properties compared with bulk BiVO4 or even BiVO4 nanoellipsoids, and thus, show high promise for applications as visible-light photocatalysts and temperature indicators offering improved environmental quality and safety. This mild and facile methodology should be capable of extension to the preparation of other mesostructured inorganic quantum tubes with similar characteristics, giving a range of materials with enhanced dual-responsive properties.

Keywords: temperature, Mesostructure, BiVO4, quantum tubes, visible light

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Received: 01 July 2010
Revised: 19 July 2010
Accepted: 20 July 2010
Published: 09 September 2010
Issue date: September 2010

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© The Author(s) 2010

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Acknowledgements

This work was financially supported by the National Basic Research Program of China (No. 2009CB939901), the National Natural Science Foundation of China (Nos. 90922016 and 10979047), and the Innovative Project of Chinese Academy of Sciences (No. KJCX2-YW-H2O).

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