Porous nanosheets and excellent charge carrier dynamics in Ag+-Doped Na0.5Bi2.5Nb2O9 aurivillius-phase layered perovskite for enhanced visible-light photocatalytic activity
File(s)
Author(s)
Jiamprasertboon, Arreerat
Promkamat, Punjaporn
Kafizas, Andreas
Eknapakul, Tanachat
Kongpatpanich, Kanokwan
Type
Journal Article
Abstract
The new Aurivillius layered perovskite compounds, AgxNa0.5-xBi2.5Nb2O9 (AGBNO), were successfully synthesized using a hydrothermal technique followed by conventional, microwave-assisted, and acid-assisted ion exchange procedures. The formation of these compounds was evidenced by several techniques. A single-phase crystal structure was identified by XRD patterns, and expanded lattice parameters were revealed by crystal structure refinement. Chemical composition was verified by EDS, XPS, and ICP-OES analyses. Bandgap energies remained similar to the parent Na0.5Bi2.5Nb2O9 host material. Ag+ incorporation significantly enhanced photocatalytic performance for Rhodamine B degradation under visible light, which was attributed to the intrinsic catalytic properties of Ag+ as a noble metal cation. The variations in photocatalytic activities among the series of Ag+-doped samples produced were associated with differences in morphology, specific surface area, and charge carrier dynamics. The AGBNO sample prepared via acid-assisted ion exchange exhibited the highest photocatalytic efficiency, which was attributed to its highly porous nanosheet morphology, largest surface area, and excellent charge carrier dynamics, including high initial charge carrier concentration, optimal lifetime, high charge mobility, efficient charge separation, and transfer. Overall, this study demonstrates the potential of designing Aurivillius-phase layered perovskite photocatalysts with enhanced activity for wastewater remediation and environmental applications through noble metal cation doping.
Date Issued
2025-06-16
Date Acceptance
2025-04-08
Citation
Chemistry: An Asian Journal, 2025, 20 (12)
ISSN
1861-471X
Publisher
Wiley
Journal / Book Title
Chemistry: An Asian Journal
Volume
20
Issue
12
Copyright Statement
© 2025 Wiley-VCH GmbH. This is the author’s accepted manuscript made available under a CC-BY licence in accordance with Imperial’s Research Publications Open Access policy (www.imperial.ac.uk/oa-policy)
License URL
Identifier
10.1002/asia.202500151
Publication Status
Published
Article Number
e202500151
Date Publish Online
2025-04-21