Structure and surface of Ca10-xBix(PO4)6(OH)2-xOx solid solutions for light-driven photocatalytic degradation of oxytetracycline
Abstract
This study highlights the effect of oxygen vacancies generated by the substitution of Ca²⁺ with Bi³⁺ in Ca 10-x Bi x (PO 4 ) 6 (OH) 2-x O x apatites for photocatalytic degradation of oxytetracycline (OTC) under UV and visible light. Characterizations reveal that the introduction of Bi³⁺ induces the formation of structural oxygen vacancies and modifies the electronic properties, with a substitution limit fixed at x = 0.3. Photocatalytic tests show that the controlled presence of these vacancies improves charge separation and the generation of reactive species, allowing a complete OTC degradation with x = 0.1. These results demonstrate the key role of Bi substitution and the formed oxygen vacancies in the design of efficient apatite-based photocatalysts.
Fields of Study & Subjects
Advanced Photocatalysis Techniques
TiO2 Photocatalysis and Solar Cells
Nuclear materials and radiation effects
Publication details
- Journal / source
- Colloids and Surfaces A Physicochemical and Engineering Aspects
- Publisher
- Elsevier BV
- Volume
- 737
- Pages
- 139776–139776
- Publication date
- 30 January 2026
- Language
- EN