cover image: Designing Visible-Light Photoactive Thioapatites Using Thiovanadate Groups: The Ba5(VO4-αSα)3X (X = F, Cl, I) Phases

Designing Visible-Light Photoactive Thioapatites Using Thiovanadate Groups: The Ba5(VO4-αSα)3X (X = F, Cl, I) Phases

20 Nov 2023

The new thioapatite Ba5(VO4-αSα)3X (X = F, Cl, I) series of compounds was prepared and characterized. Compared to known apatite phases built from unconnected vanadate VO4 groups separated by Ba2+ cations delimiting halide-filled channels, their crystal structure is built from mixed anion thiovanadate VO4-αSα, where V5+ is surrounded by both O and S, therefore exhibiting a triple anion lattice. Here, the strategy consisting in incorporating a chalcogenide anion aims at raising the valence band to bring the band gap to the visible range in order to reach photoactive materials under visible light. Both the halide anion nature and the S/O ratio impact the materials' photoconductivity. While the photocurrent response is comparable to that found in the recently investigated apatite phase Pb5(VO4)3I, a short carrier lifetime is detected as well as a shift of the activity toward the visible light. This apatite series combining thiovanadate and halide-filled channels opens new perspectives in the extended field of apatites and their applications.

Authors

Batoul Almoussawi, Smritijit Sen, Sebastien Saitzek, Pascal Roussel, Houria Kabbour

Bibliographic Reference
Batoul Almoussawi, Smritijit Sen, Sebastien Saitzek, Pascal Roussel, Houria Kabbour. Designing Visible-Light Photoactive Thioapatites Using Thiovanadate Groups: The Ba5(VO4-αSα)3X (X = F, Cl, I) Phases. Inorganic Chemistry, 2023, Inorg Chem, 62 (46), pp.18970-18981. ⟨10.1021/acs.inorgchem.3c02592⟩. ⟨hal-04305135⟩
DOI
https://doi.org/10.1021/acs.inorgchem.3c02592
HAL Collection
["Université d'Artois", 'CNRS - Centre national de la recherche scientifique', 'Unité de Catalyse et de Chimie du Solide', 'Institut des matériaux Jean Rouxel', 'Institut de Chimie du CNRS', 'Université de Lille']
HAL Identifier
4308726
Institution
["Université d'Artois", 'Centrale Lille', 'Institut de Chimie - CNRS Chimie', 'Université de Nantes']
Laboratory
['Unité de Catalyse et Chimie du Solide - UMR 8181', 'Institut des Matériaux Jean Rouxel']
Published in
France

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