The Tungstic Acids

Enhancement of the antimicrobial properties of orthorhombic molybdenum trioxide by thermal induced fracturing of the hydrates

“…Molybdenum trioxide dihydrate was prepared by an acidification method as reported in literature [36]. 50 g of Na 2 MoO 4 × 2H 2 O (N99.0%, Fluka, St. Gallen, Switzerland) was dissolved in 100 mL of water (HiPerSolv Chromanorm, VWR, Darmstadt, Germany) filtered (0.2 μm) and added to 400 mL of 5 N HNO 3 (≥ 99.5%, Sigma-Aldrich, St. Louis).…”

Synthesis and characterization of tungsten trioxide powders prepared from tungstic acids

“…Tungstic acids of general formula WO 3 ÁnH 2 O were synthesised using the methods of Freedman [10] (samples 1-7, 9 and 10) and Gerand et al [11] (sample 8). ) with stirring at 5 8C.…”

“…The synthesis of compounds with n ¼ 1/3, 1/2, 1 or 2 has been reported [10][11][12]. The structure of tungstic acids [10][11][12] is composed of basic units of WO 6 octahedra linked by shared corners, like in tungsten trioxide [12][13][14] Materials Research Bulletin 39 (2004) [683][684][685][686][687][688][689][690][691][692][693] but in a more open framework.…”

“…The synthesis of compounds with n ¼ 1/3, 1/2, 1 or 2 has been reported [10][11][12]. The structure of tungstic acids [10][11][12] is composed of basic units of WO 6 octahedra linked by shared corners, like in tungsten trioxide [12][13][14] Materials Research Bulletin 39 (2004) [683][684][685][686][687][688][689][690][691][692][693] but in a more open framework. Solution methods involving tungstic acids as precursors have been reported, for example, the preparation of mesoporous WO 3 films using as precursor a colloidal solution of tungstic acid [15] and the synthesis of WO 3 by treatment of tungstic acid (WO 3 ÁH 2 O) with organic ligands or water-in-oil emulsions [16].…”

Cathodic electrocrystallization and electrochromic properties of doped rechargeable oxotungstates

“…6a shows the experimental pattern of tungstic acid synthesized according to Refs. [32,33]. The pattern of the molybdenum-containing film (curve 1 in Fig.…”