NDLI: One step fabrication of C-doped BiVO<sub>4</sub> with hierarchical structures for a high-performance photocatalyst under visible light irradiation

Content Provider	Royal Society of Chemistry (RSC)
Author	Chen, Zhixin Zhang, Wang Yin, Chao Zhu, Shenmin Gu, Jiajun Zhang, Di
Copyright Year	2013
Abstract	A novel sol–gel method was developed for the fabrication of a C-doped BiVO4 (BVOB@xC) photocatalyst with fine hierarchical structures templated from Papilio paris butterfly wings. The fine hierarchical butterfly wing structures of BVOB@xC were confirmed by the SEM and TEM observations. The doped carbon in BVOB@xC was formed in situ from the biotemplate during a calcination process and the amount of doping could be controlled from 0.6–2.4 wt% by adjusting the calcination temperature. It was found that the sample calcined at 400 °C with a carbon content of 1.5 wt% (BVOB@1.5C) demonstrated the best photocatalytic activity in both photocatalytic degradation and O2 evolution from water splitting (ca. 800 μmol L−1). Under visible light irradiation (λ > 420 nm), the photocatalytic O2 evolution from BVOB@1.5C (ca. 800 μmol L−1, after 5 h) is 16 times higher than that of pure BiVO4 powder (BVOP) (ca. 49 μmol L−1), and the photocatalytic decomposition efficiency of MB for BVOB@1.5C is 6.3 times higher than that of pure BVOP. The improved photocatalytic performance is attributed to the synergetic effect of the unique morphology and composition control. It is believed that the hierarchical butterfly wing structures of BVOB@1.5C contribute significantly to the absorption enhancement under visible light (480 to 700 nm), which was supported by UV-Vis diffuse reflectance measurements. The photocatalytic performance was further enhanced by the C-doping as it improves the efficient separation and transfer of the photogenerated electrons and holes, as evidenced by the electron paramagnetic resonance (EPR) measurements. This strategy provides a simple one-step method to fabricate a high-performance photocatalyst, which enables the simultaneous control of the crystal phase, morphology, and carbon element doping.
Starting Page	8367
Ending Page	8378
Page Count	12
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	1
Issue Number	29
Journal	Journal of Materials Chemistry A
DOI	10.1039/c3ta11833a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Papilio EPR Photocatalysis Papilio paris Butterfly Transmission electron microscopy Carbon Calcination Dopant Oxygen Water splitting Electron paramagnetic resonance
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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