BiVO(4)/TiO(2)(N(2)) Nanotubes Heterojunction Photoanode for Highly Efficient Photoelectrocatalytic Applications

ABSTRACT: We report the development of a novel visible response BiVO(4)/TiO(2)(N(2)) nanotubes photoanode for photoelectrocatalytic applications. The nitrogen-treated TiO(2) nanotube shows a high carrier concentration rate, thus resulting in a high efficient charge transportation and low electron–hole recombination in the TiO(2)–BiVO(4). Therefore, the BiVO(4)/TiO(2)(N(2)) NTs photoanode enabled with a significantly enhanced photocurrent of 2.73 mA cm(−2) (at 1 V vs. Ag/AgCl) and a degradation efficiency in the oxidation of dyes under visible light. Field emission scanning electron microscopy, X-ray diffractometry, energy-dispersive X-ray spectrometer, and UV–Vis absorption spectrum were conducted to characterize the photoanode and demonstrated the presence of both metal oxides as a junction composite. GRAPHICAL ABSTRACT: Visible-light response BiVO(4)/TiO(2)(N(2)) naontubes photoelectrode was fabricated for photoelectrochemical water splitting and organic degradation in this paper. [Image: see text] ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s40820-016-0115-3) contains supplementary material, which is available to authorized users.