Bactericidal activity of Ag4V2O7/β-AgVO3 heterostructures against antibiotic-resistant Klebsiella pneumoniae

Introducing Structural Diversity: Fe2(MoO4)3 Immobilized in Chitosan Films as an Efficient Catalyst for the Selective Oxidation of Sulfides to Sulfones

“…H 2 O 2 can interact directly with the regions with electron density deficit, giving rise to two hydroxyl radicals (⋅OH) that can actively participate in the oxidation of sulfides [40] . In addition, H 2 O 2 can decompose into H 2 O, which in turn interacts with the regions with deficit of electron density, forming an ⋅OH and a proton (H + ), while the molecular oxygen (O 2 ) can interact with the accumulation of electron density, generating a superoxide radical (⋅O 2 − ) and evolving into an oxygen singlet ( 1 O 2 ), or with an H + , forming a hydroperoxyl radical (⋅O 2 H) [41] …”

“…[40] In addition, H 2 O 2 can decompose into H 2 O, which in turn interacts with the regions with deficit of electron density, forming an •OH and a proton (H + ), while the molecular oxygen (O 2 ) can interact with the accumulation of electron density, generating a superoxide radical (•O 2 À ) and evolving into an oxygen singlet ( 1 O 2 ), or with an H + , forming a hydroperoxyl radical (•O 2 H). [41] To investigate the oxidation mechanism, specific scavengers were used for the 1 O 2 (ascorbic acid, AA), •O 2 H (p-benzoquinone, BQ) and •OH (potassium acid biphthalate, KABP) species, as well as for the electron density deficit, i. e., holes, h + (ammonium oxalate, AO), and the electron density accumulation, i. e., e À (silver nitrate, SN) (Figure 4A). [42] A significant reduction in the conversion rate was not observed when scavengers of the 1 O 2 and •O 2 H species were used, evidencing that these species were not involved in the sulfide oxidation mechanism.…”

Hybrid Cathodic/Anodic Electrosynthesis of Phase Pure Ag4V2O7 Thin Films

“…The ions, respectively. 15 Also, the bands at 517 and 733 cm −1 reflect symmetric and asymmetric stretching modes of V-O-V bridges, respectively. The Raman-active mode at 707 cm −1 is assigned to V-O-Ag bridging.…”

“…25 These bands along with those located at 244 and 171 cm −1 were in good agreement with those reported for Ag 4 V 2 O 7 prepared using chemical precipitation method. 15 The as-prepared Ag 4 V 2 O 7 film was annealed at four different temperatures (100 °C, 150 °C, 200 °C, and 225 °C) for 30 min to study the effect of anneal temperature on crystallinity and thermal stability of the as-prepared sample. The XRD results (Fig.…”

“…1 Hydrothermal synthesis has been predominantly used for preparing Ag 4 V 2 O 7 ; other methods for making powders of this material include solid state, hydrothermal, dynamic template, molten salt flux, and solution precipitation. [3][4][5][6][7][8][9][10][11][12][13][14][15][16] However, solar energy conversion schemes demand the active material to be compatible with scale up and deployment in large area modules. Thin films are eminently suited to this scenario and electrochemical deposition [17][18][19][20][21][22] delivers the target material in thin film form on conductive substrates.…”