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ChemInform Abstract: CdWO4 Polymorphs: Selective Preparation, Electronic Structures, and Photocatalytic Activities.

โœ Scribed by Tingjiang Yan; Liping Li; Wenming Tong; Jing Zheng; Yunjian Wang; Guangshe Li

Publisher
John Wiley and Sons
Year
2011
Weight
29 KB
Volume
42
Category
Article
ISSN
0931-7597

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โœฆ Synopsis

CdWO 4 Polymorphs: Selective Preparation, Electronic Structures, and Photocatalytic Activities. -CdWO 4 polymorphs are solvothermally synthesized from mixtures of Cd 2 Cl 2 and Na 2 WO 4 using water as solvent to prepare monoclinic CdWO 4 , and propylene glycol for tetragonal CdWO 4 (autoclave, 200 ยฐC, 10 h). The samples are characterized by XRD, Raman, UV/VIS, and photoluminescence spectroscopy, and DFT electronic structure calculations. Monoclinic CdWO 4 exhibits a much higher photocatalytic activity than tetragonal CdWO 4 towards the degradation of methyl orange under UV light irradiation -(

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ChemInform Abstract: Synthesis, Structures and Photocatalytic Activities of Microcrystalline ABi2Nb2O9 (A: Sr, Ba) Powders.
โœ Weiming Wu; Shijing Liang; Xiaowei Wang; Jinhong Bi; Ping Liu; Ling Wu ๐Ÿ“‚ Article ๐Ÿ“… 2011 ๐Ÿ› John Wiley and Sons โš– 22 KB ๐Ÿ‘ 2 views

of the title compounds are prepared by a citrate complex method starting with an aqueous solution of NH4H2[NbO(C2O4)3], M(NO3)2 (M: Sr, Ba), and Bi(NO3)3, citric acid, H2O2, and HNO3 (pH 6.5 adjusted with NH3, 65 ยฐC, 1 h). The resulting gel is calcined at 650-850 ยฐC (4 h). Single phase orthorhombic