EDTA-mediated shape-selective synthesis of Bi2WO6 hierarchical self-assemblies with high visible-light-driven photocatalytic activities

N-doped Na2Ti6O13@TiO2 core–shell nanobelts with exposed {1 0 1} anatase facets and enhanced visible light photocatalytic performance

“…Alkali metal titanates, with the general formula of A 2 Ti n O 2n+1 (A = Li, Na, and K and n = [3][4][5][6][7][8], have an open-layered structure (n = 2-4) or a tunnel structure (n = 6-8) depending on the value of n. For example, Na 2 Ti 3 O 7 with three TiO 6 octahedra in a unit cell has a layered structure while Na 2 Ti 6 O 13 with six TiO 6 octahedra in a unit cell has a tunnel structure. Due to their stoichiometrydependent structure and physicochemical properties, alkali metal titanates have been intensively explored in such applications as photocatalyst [9][10][11], lithium and sodium ion battery [12,13], gas and humidity sensing, and antibacterial agent [14,15].…”

“…Photocatalysis, using semiconductors, has become an area of great research interest due to its potential applications in solving energy supply and environmental pollution problems [1][2][3][4][5]. TiO 2 is the most widely investigated photocatalyst due to its high photoactivity, exceptional optical and electronic properties, low cost and toxicity, and good chemical and thermal stability [6,7].…”

Hydrothermal synthesis of visible-light-driven hierarchical Bi3.84W0.16O6.24 photocatalysts toward efficient degradation of methyl orange

“…At the initial stage, the irregular nanoparticles are first formed after the pH is set at 12.5 using cyclohexylamine solution at RT. After following hydrothermal treatment for different times at 140°C, the as-prepared nanoparticles tend to grow, fuse, and assemble into flake-like structures via the Ostwald ripening mechanism Xu et al 2011). Meanwhile, these nanoflake building blocks gradually aggregate together, and thus form the sub-microsphere architectures to meet low-energy configuration through the oriented aggregation process (Zhou et al 2012).…”

“…In particular, a remarkable progress has been achieved on the photocatalytic exploration for lots of Bi-based mixed complex metal oxides (Xu et al 2011;Hou et al 2006;Wang et al 2011a, b), including Bi 2 WO 6 (Xu et al 2011;Zhang et al 2013a;Tian et al 2013;Wang et al 2012), Bi 2 MoO 6 (Zhang et al 2013b;Jing et al 2013;Zhang et al 2012), Bi 38 ZnO 58 (Hou et al 2006), BiVO 4 (Rao et al 2014;Zhou et al 2013;Jeong et al 2013), and Bi 3.84 W 0.16 O 6.24 (Wang et al 2011a, b), benefiting from their high photocatalytic performance assisted by the visible-light irradiation. Among them, Bi 3.84 W 0.16 O 6.24 , as one of the bismuth tungsten complex oxides, has drawn enormous attention.…”

Facile hydrothermal synthesis of Bi2WO6 microdiscs with enhanced photocatalytic activity

“…The nuclei prefer to grow into 2D nanoplates because of the high intrinsic anisotropic nature of Bi 2 WO 6 [20]. On the other hand, organic reagents usually play critical roles in reducing the activity of nanobuilding blocks to promote or tune the ordered self-assembly [21]. The acetic acid adsorbed on the surface of Bi 2 WO 6 would direct the self-assembly of nanoplates due to molecular interaction and electrostatic effects.…”