Publication: Single-atom sn-loaded exfoliated layered titanate revealing enhanced photocatalytic activity in hydrogen generation
Program
KU Authors
Co-Authors
Ide, Yusuke
Advisor
Publication Date
2023
Language
English
Type
Journal Article
Journal Title
Journal ISSN
Volume Title
Abstract
Green H2 generation through layered materials plays a significant role among a wide variety of materials owing to their high theoretical surface area and distinctive features in (photo)catalysis. Layered titanates (LTs) are a class of these materials, but they suffer from large bandgaps and a layers' stacked form. We first address the successful exfoliation of bulk LT to exfoliated few-layer sheets via long-term dilute HCl treatment at room temperature without any organic exfoliating agents. Then, we demonstrate a substantial photocatalytic activity enhancement through the loading of Sn single atoms on exfoliated LTs (K0.8Ti1.73Li0.27O4). Comprehensive analysis, including time-resolved photoluminescence spectroscopy, revealed the modifica-tion of electronic and physical properties of the exfoliated layered titanate for better solar photocatalysis. Upon treating the exfoliated titanate in SnCl2 solution, a Sn single atom was successfully loaded on the exfoliated titanate, which was characterized by spectroscopic and microscopic techniques, including aberration-corrected transmission electron microscopy. The exfoliated titanate with an optimal Sn loading exhibited a good photocatalytic H2 evolution from water containing methanol and from ammonia borane (AB) dehydrogenation, which was not only enhanced from the pristine LT, but higher than conventional TiO2-based photocatalysts like Au-loaded P25.
Description
Source:
ACS Sustainable Chemistry and Engineering
Publisher:
American Chemical Society (ACS)
Keywords:
Subject
Chemistry, Chemistry, physical and theoretical, Chemistry, technical, Green chemistry, Science, Technology, Chemical engineering