Rational Fabrication of Hierarchical Z‐Scheme WO₃/Bi₂WO₆ Nanotubes for Superior Photoelectrocatalytic Reaction

Abstract

To develop efficient and stable photocatalysts for visible light pollutant degradation, hierarchical Z‐Scheme WO3/Bi2WO6 nanotubes have been rationally designed and fabricated via a combined electrospinning‐calcination process. Moreover, the morphology of as‐fabricated nanotubes could be tuned by the annealing temperature. Accordingly, the newly‐designed hierarchical Z‐Scheme system highly facilitates the separation and migration of photoinduced charge carriers, and enhances the broadened photoabsorption range and high redox capacity owning to the synergistic effects of WO3 and Bi2WO6. Meanwhile, the corresponding possible formation mechanism is proposed as well. Benefiting from the unique structural features, the optimized 550 °C‐WO3/Bi2WO6 nanotubes exhibit the remarkable photoelectrochemical activity and photocatalytic performance for degrading pollutant models (4‐NP and RhB), among which reaction rate is superior to 500 °C and 600 °C‐WO3/Bi2WO6 counterparts. This work may shed light on rational design and construction of hierarchical Z‐Scheme WO3/Bi2WO6 nanotubes for energy and environment‐related applications.

Facile Fabrication of Z-Scheme Bi2WO6/WO3 Composites for Efficient Photodegradation of Bisphenol A with Peroxymonosulfate Activation

“…[17,20,23]. In particular, constructing rational heterostructure with other components, such as BiVO 4 [21,24], g-C 3 N 4 [22,25], and Bi 2 WO 6 [9,26], has been reported to greatly improve the photocatalytic performances. In this regard, Bi 2 WO 6 , a classic of Aurivillius oxide, is an ideal selection for constructing heterojunction composites with WO 3 , due to its unique layered structures with composition of the layers of corner-shared WO 6 octahedra sandwiched between the [Bi 2 O 2 ] 2+ layers [27,28].…”

The design and growth of peanut-like CuS/BiVO4 composites for photoelectrochemical sensing

“…To date, photocatalysts with a bismuth-system have found application in PEC study, including BiVO 4 , Bi 2 MoO 6 , Bi 2 WO 6 , BiPO 4 and so on. [15][16][17][18] Bismuth-system oxides, which are composed of 6s Bi orbitals and 2p oxygen orbitals, display outstanding electrical and optical characteristics. 19 Moreover, they enjoy several popular strengths, e.g., abundance, low toxicity, and low cost.…”