Muktha, B. ; Darriet, J. ; Madras, Giridhar ; Guru Row, T. N. (2006) Crystal structures and photocatalysis of the triclinic polymorphs of BiNbO4 and BiTaO4 Journal of Solid State Chemistry, 179 (12). pp. 3919-3925. ISSN 0022-4596
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S00224...
Related URL: http://dx.doi.org/10.1016/j.jssc.2006.08.032
Abstract
The high-temperature polymorphs of two photocatalytic materials, BiNbO4 and BiTaO4 were synthesized by the ceramic method. The crystal structures of these materials were determined by single-crystal X-ray diffraction. BiNbO4 and BiTaO4 crystallize into the triclinic system P1- (No. 2), with a=5.5376(4) Å, b=7.6184(3) Å, c=7.9324(36) Å, α=102.565(3)°, β=90.143(2)°, γ=92.788 (4)°, V=326.21 (5) Å3, Z=4 and a=5.931 (1) Å, b=7.672 (2) Å, c=7.786 (2) Å, α=102.94 (3)°, β=90.04 (3)° γ=93.53 (3)°, V=344.59 (1) Å3 and Z=4, respectively. The structures along the c-axis, consist of layers of [Bi2O2] units separated by puckered sheets of (Nb/Ta)O6 octahedra. Photocatalytic studies on the degradation of dyes indicate selectivity of BiNbO4 towards aromatics containing quinonic and azo functional groups.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Single-Crystal X-Ray Diffraction; Crystal Structure; Bismuth Niobate; Bismuth Tantalate; Photocatalysis |
| ID Code: | 12015 |
| Deposited On: | 10 Nov 2010 05:06 |
| Last Modified: | 02 Jun 2011 11:49 |
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