Structure and optical properties of a new AgBiW2O8 polymorph

被引：4

作者：

Sotelo, Paola ^{[1
]}

Moore, Michael ^{[1
]}

Galante, Miguel T. ^{[1
,2
]}

Longo, Claudia ^{[2
]}

Rajeshwar, Krishnan ^{[1
]}

Suescun, Leopoldo ^{[3
]}

Macaluso, Robin T. ^{[1
]}

机构：

[1] Univ Texas Arlington, Dept Chem & Biochem, Arlington, TX 76019 USA

[2] Univ Campinas UNICAMP, Inst Chem, BR-13083970 Campinas, SP, Brazil

[3] Univ Republica, Cryssmat Lab DETEMA, Fac Quim, Montevideo 11800, Uruguay

来源：

POLYHEDRON | 2019年 / 170卷

关键词：

AgBiW2O8; Bi2WO6; Arc-melting; Photocatalysis; Semiconductor; BI2WO6; BISMUTH; SILVER; SCHEELITE; OXIDES;

D O I：

10.1016/j.poly.2019.06.007

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

In this work, we report a novel polymorph of AgBiW2O8, which was synthesized by a simple arc melting method. The structural details of this compound were determined by X-ray powder diffraction, and elemental composition was confirmed with ICP-AES. beta-AgBiW2O8 adopts the scheelite structure type with tetragonal space group I4(1)/a and lattice parameters a = b = 5.3019(3) and c= 11.678(2) angstrom. Structural details and optical properties are discussed in detail. Diffuse reflectance spectroscopy (DRS) measurements of beta-AgBiW2O8 showed light absorption profile extended to the visible region, which suggests the material has a smaller band gap energy than Bi2WO6, as expected due to contribution of Ag d-orbitals to the electronic structure. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：486 / 489

页数：4

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