Photoinduced effect on the phase transition in Ag3VO4 thin films

Facile synthesis of novel α-Ag3VO4 nanostructures with enhanced photocatalytic activity

“…Unlike bulk materials, properties of nanomaterials are 25 strongly dependent on their morphology such as size, shape and surface condition, thus increasing interest in controllable synthesis of nanomaterials with unique morphologies [12][13][14][15] . In recent years, significant advances in the controlled preparation of nanomaterials have been made [16,17] .…”

“…With increasing HVO 4 2concentration, Ag 2 O precipitation dissolved gradually induced by alkaline 65 environment and then a complex composed of Ag + and OHappeared. Subsequently, α-Ag 3 VO 4 was formed by the reaction of Ag(OH) 2 and HVO 4 2due to a higher chemical stably than β-Ag 3 VO 4 [25] . In the process of nanoflowers formation, with the increasing of n-BA concentration, the 70 color of the reaction system turned from dark brown to transparent (equation 6).…”

“…The UV-Vis spectra of α-Ag 3 VO 4 nanostars, nanoflowers 20 and the nanoparticles (SEM image was listed in Figure S6) are shown in Figure 3a. As an indirect semiconductor material, the band gap energies of α-Ag 3 VO 4 can be estimated from the plot of transformed Kubelka-Munk function versus the energy of exciting light and the band gap energies of α-Ag 3 VO 4 25 nanostars, nanoflowers and the nanoparticles estimated from these intercepts is about of 1.90 eV, 1.95 and 2.05 eV [28] , respectively. By comparing the three curves, α-Ag 3 VO 4 nanostars have the highest absorbance intensity and the absorption edge shows a little red shift.…”

“…Subsequently, α-Ag 3 VO 4 was formed by the reaction of Ag(OH) 2 − and HVO 4 2− due to a higher chemical stablity than β-Ag 3 VO 4. 25 In the process of nanoflower formation, with the increasing of n-BA concentration, the color of the reaction system turned from dark brown to transparent (eqn ( 6)). When the system was completely transparent, Tollens-reagent was synthesized at a pH of 10.91, which was attributed to the higher Ks of the silver amine complex compared with AgOH (Ks Ag(n−BA)2+ = 1.05 × 10 7 and Ks AgOH = 1 × 10 4 ).…”

Novel Polyanionic Topologies in Ag2VAsO6 and Ag6V2As2O13

“…Silver vanadates(V) have attracted considerably more interest because of their potential for application in catalysis [4,8], including photocatalysis [5,9], as p-type transparent conductors [10], or as materials for medical primary batteries [11]. Correspondingly, besides Ag 3 VO 4 and its polymorphs, several silver vanadates(V), Ag 4 V 2 O 7 [12], Ag 2 V 4 O 11 [13], AgV 6 O 15 [14], and AgVO 3 [15] …”