Enhanced photocatalytic efficiency of Bi2MoO6 for water and p-nitroaniline reduction via iodate (I5+) substitution: Implications of small polaron formation
2
Issued Date
2025-09-01
Resource Type
ISSN
13858947
Scopus ID
2-s2.0-105008691769
Journal Title
Chemical Engineering Journal
Volume
519
Rights Holder(s)
SCOPUS
Bibliographic Citation
Chemical Engineering Journal Vol.519 (2025)
Suggested Citation
Waehayee A., Ngamwongwan L., Kafizas A., Chankhanittha T., Butburee T., Nakajima H., Wannapaiboon S., Pornsuwan S., Suthirakun S., Siritanon T. Enhanced photocatalytic efficiency of Bi2MoO6 for water and p-nitroaniline reduction via iodate (I5+) substitution: Implications of small polaron formation. Chemical Engineering Journal Vol.519 (2025). doi:10.1016/j.cej.2025.165082 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/110956
Title
Enhanced photocatalytic efficiency of Bi2MoO6 for water and p-nitroaniline reduction via iodate (I5+) substitution: Implications of small polaron formation
Corresponding Author(s)
Other Contributor(s)
Abstract
The wide range of potential applications for photocatalysis has made research on photocatalytic materials highly active. However, various limitations hinder large-scale applications of photocatalysis, making the search for novel and improved catalysts an ongoing pursuit. To achieve this, a detailed analysis of material characteristics and charge transfer behavior is crucial. This study investigates the enhancement of Bi<inf>2</inf>MoO<inf>6</inf> (BMO) photocatalytic performance through iodate (I<sup>5+</sup>) substitution, focusing on its impact on charge transport and reaction efficiency. Employing experimental and computational methods, we propose that carrier migration in Bi<inf>2</inf>MoO<inf>6</inf> follow a small polaron model. Substituting I<sup>5+</sup> into Bi<inf>2</inf>MoO<inf>6</inf> increase the exposure on {100} facets, where polaron hopping along the facet is easier than on the exposed {010} facet of pristine Bi<inf>2</inf>MoO<inf>6</inf>. Moreover, this substitution creates defects and increases charge carrier concentration by approximately threefold. The increased Fermi energy level enables I-doped Bi<inf>2</inf>MoO<inf>6</inf> to generate H<inf>2</inf> and enhance p-nitroaniline reduction activity. As a result, the catalyst exhibits nearly 10 times higher efficiency in both reactions. This work highlights a defect-engineering strategy that potentially involves polaronic transport to improve photocatalyst design, offering a promising solution for sustainable energy applications, including water splitting and selective organic transformations.