PREPARATION AND OPTICAL STUDIES OF POLYCRYSTALLINE BI2WO6

被引：13

作者：

MAHANTY, S

GHOSE, J

机构：

[1] Solid State Chemistry Laboratory, Department of Chemistry, Indian Institute of Technology, Kharagpur

来源：

MATERIALS LETTERS | 1991年 / 11卷 / 8-9期

关键词：

D O I：

10.1016/0167-577X(91)90196-D

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Bi2WO6 was prepared by solid-state reaction between WO3 and Bi2O3. The optical properties were investigated and a Kramers-Kronig analysis made of reflectance data in the UV/VIS region and the optical constants n and k (refractive index and extinction coefficient respectively), and the absorption coefficient (alpha), determined. WO3 was shown to have an indirect band gap of 2.91 eV and Bi2O3 a direct gap of 2.77 eV. Bi2WO6 exhibits a direct band gap of 3.13 eV. This high value of the gap restricts its use as a photoanode for photoelectrochemical decomposition of water using solar radiation in the visible.

引用

页码：254 / 256

页数：3

共 16 条

[1]

Berak J. M., 1970, J SOLID STATE CHEM, V2, P109, DOI DOI 10.1016/0022-4596(70)90040-X

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