Work

Sodium-doped La2Ti2O7 synthesized by molten salt synthesis method for photocatalytic overall water splitting

Year: 2024

Type: article

Abstract: Solar-driven hydrogen production through water splitting is currently one of the research hotspots nowadays. Lanthanum titanate (La2Ti2O7) is one kind of layered-structure perovskite photocatalyst and possesses a superior electronic structure for photocatalytic overall water splitting. However, it suffers from several drawbacks, such as poor photo absorption and easy recombination of photogenerated charge carriers. In this study, the sodium (Na) ion-doped La2Ti2O7 with plate-like crystal morphology were synthesized by using molten salt synthesis (MSS) method. The XRD and TEM results indicated that MSS method enhanced the crystallinity of La2Ti2O7. UV-vis and Raman spectra disclosed that Na doping introduced oxygen vacancies. The Na (0.3 mol%)-doped La2Ti2O7 synthesized by MSS method provided the optimal hydrogen evolution rate, and the value was 6.43 times greater than that of pure La2Ti2O7 synthesized by traditional solid-state reaction (SSR) method. The synergistic effect of crystal facet engineering and defect engineering remarkably enhanced the photocatalytic activity of La2Ti2O7.

Source: Applied Catalysis A General

DOI: 10.1016/j.apcata.2024.120079