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Efficient charge separation based on type-II g-C3N4/TiO2-B nanowire/tube heterostructure photocatalysts.

Dalton transactions (Cambridge, England : 2003) (2015-06-24)
Hongmei Chen, Yinghao Xie, Xiaoqin Sun, Meilin Lv, Fangfang Wu, Lei Zhang, Li Li, Xiaoxiang Xu
ABSTRACT

Separation of photo-generated charges has played a crucial role in controlling the actual performance of a photocatalytic system. Here we have successfully fabricated g-C3N4/TiO2-B nanowire/tube heterostructures through facile urea degradation reactions. Owing to the effective separation of photo-generated charges associated with the type-II band alignment and intimate interfacial contacts between g-C3N4 and TiO2-B nanowires/tubes, such heterostructures demonstrate an improved photocatalytic activity over individual moieties. Synthetic conditions such as hydrothermal temperatures for the preparation of TiO2-B and the weight ratio of TiO2-B to urea were systematically investigated. A high crystallinity of TiO2-B as well as the proper growth of g-C3N4 on its surface are critical factors for a better performance. Our simple synthetic method and the prolonged lifetime of photo-generated charges signify the importance of type-II heterostructures in the photocatalytic applications.

MATERIALS
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Product Description

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