Defect Clustering and Ordering in Zn-Doped TiO2 upon Solution Annealing

TiO2−ZnO powders in a molar ratio of 92:8 were subject to solution annealing via a reactive sintering route prior to X-ray diffraction and transmission electron microscopic studies. Charge-compensating defect clusters and planar faults predominantly parallel to (121) and (132) planes, analogous to t...

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Bibliographic Details
Published inJournal of physical chemistry. C Vol. 113; no. 1; pp. 328 - 332
Main Authors Chen, Tzu-jung, Shen, Pouyan
Format Journal Article
LanguageEnglish
Published American Chemical Society 08.01.2009
Subjects
C: Surfaces, Interfaces, Catalysis
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Summary:TiO2−ZnO powders in a molar ratio of 92:8 were subject to solution annealing via a reactive sintering route prior to X-ray diffraction and transmission electron microscopic studies. Charge-compensating defect clusters and planar faults predominantly parallel to (121) and (132) planes, analogous to the crystallographic shear of nonstoichiometric Ti n O2n−1 with specific extent of oxygen vacancies, were formed in the Zn-doped TiO2 of the rutile-type structure when quenched from 1300 °C in air. Upon annealing at 900 °C, an additional phase with 3x(101) commensurate superstructure was formed by an ordering process and Guinier−Preston zones parallel to (100) and (010) were exsolved via anisotropic lattice diffusion.
ISSN:1932-7447
1932-7455
DOI:10.1021/jp8084793