Abstract
Abstract Hydration behavior of A′Ca2Ta3O10 (A′ = Cs, Rb, K, Na, and Li) was studied focusing on the photocatalytic activity for overall water splitting under UV-irradiation. Interlayer hydration was only observed for A′ = Na and Li, which possess a large enthalpy of hydration (ΔHh°). A Na phase readily yielded a stable hydrous phase even at ambient temperature, whereas a Li phase required hydrothermal treatment at ≥160 °C. This is consistent with the fact that the Na phase kept its space group (I4⁄mmm) unchanged during hydration, whereas the Li phase changed from I4⁄mmm to P4⁄mmm. Hydration of the Li phase doubled the rate of photocatalytic gas evolution (≥700 μmol-H2 h−1) in the presence of 0.5 wt % Ni load, which was the highest in the series of A′Ca2Ta3O10. It was demonstrated that the hydrated interlayer is an efficient structural modification to enhance the photocatalytic activity of the ion-exchangeable layered perovskite-type oxides.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
