One-step approach to novel Bi₄V₂O₁₁hierarchical hollow microspheres with high visible-light-driven photocatalytic activities

Abstract

New visible-light-sensitive hierarchical Bi 4 V 2 O 11 hollow microspheres have been successfully synthesized by a facile template-free solvothermal route. The hierarchical Bi 4 V 2 O 11 superstructure was constructed of single-crystalline nanoplates with a porous surface. A possible growth pattern and formation mechanism of hierarchical Bi 4 V 2 O 11 hollow microspheres was proposed. The Brunauer-Emmett-Teller (BET) surface area of the hollow sample was 84.613 m 2 g À1 , which was much higher than other prepared Bi 4 V 2 O 11 powders. The hierarchical Bi 4 V 2 O 11 hollow microspheres exhibited excellent visiblelight-driven photocatalytic activity for the degradation of Rhodamine-B (RhB). The improved photocatalytic performance could be ascribed to the high specific surface area, the narrow band gap and unique hierarchical hollow structure. The resulting hierarchical Bi 4 V 2 O 11 hollow microspheres are very promising photocatalysts for degrading organic pollutants and other applications.

On structure and methylene blue degradation activity of an Aurivillius-type photocatalyst of Bi4V2O11 nanoparticles

“…Thakral et al [31] firstly investigated the visible-light photocatalytic performance of Bi 4 V 2 O 11 prepared by conventional solid state method. More recently, Chen et al [32] reported Bi 4 V 2 O 11 hollow microspheres with hierarchical superstructures. It has been reported that the optical behavior of Bi 4 V 2 O 11 is highly sensitive to the synthetic conditions [31,33].…”

“…It has been reported that the optical behavior of Bi 4 V 2 O 11 is highly sensitive to the synthetic conditions [31,33]. The synthesis method, the morphology and the size of crystals play a crucial role in determining the photocatalytic performance [32].…”

Realizing nanosized interfacial contact via constructing BiVO4/Bi4V2O11 element-copied heterojunction nanofibres for superior photocatalytic properties

“…Many nontypical stoichiometric semiconductor photocatalysts, such as Bi 3 [18], Bi 2 VO 5.5 [19] and W 18 O 49 [20,21], could be qualified as ideal candidates for the construction of heterojunction with nansozied interfacial contact. These nontypical stoichiometric photocatalysts exhibit excellent photocatalytic activity owing to their unique band structure, more strong mobility of charge carriers and effective capacity in separation of photoinduced electron-hole pairs, compared with their corresponding typical stoichiometric semiconductor photocatalysts (BiOX (X = Cl, Br, I), BiVO 4 and WO 3 ).…”

Advanced Nanomatericals for Solar Photocatalysis

“…Morphology control is an efficient method to facilitate carrier transportation and light harvesting, accelerate charge movement within the material structure and assist the collection and separation of electron-hole pairs at the interface of the materials [199][200][201][202]. Controllable synthesis of BiVO 4 with controlled morphologies has been notable developed (such as nanorods, nanowires, nanotubes (NTs), nanobelts, nanoellipsoids, hollow spheres, and even some hierarchical architectures) and corresponding morphology-dependent photocatalytic properties have also been extensively studied [203][204][205][206][207][208][209][210][211]. For example, Tada et al first fabricated BiVO 4 nanorods (NRs) using polyethylene glycol (PEG) as a shape−directing agent [203].…”