Fluorination over Cr doped layered perovskite Sr2TiO4 for efficient photocatalytic hydrogen production under visible light illumination

Layered Perovskite Compound NaLaTiO4 Modified by Nitrogen Doping as a Visible Light Active Photocatalyst for Water Splitting

“…The AQE matches closely to the absorption spectra of NaLaTiO 4– x N y , indicating that O 2 /H 2 production is essentially driven by photons. For O 2 production, an AQE of 3.2% at 420 ± 20 nm has been recorded which is among the highest one reported to date on Ruddlesden–Popper-type photocatalysts. − The photocatalytic activity of NaLaTiO 4– x N y was further investigated by repeated usage for O 2 /H 2 production (Figure S9a,c). No clear degradation on photocatalytic activity of NaLaTiO 4– x N y has been observed for at least three cycles, and XRD analysis indicates no structural changes during these experiments (Figure S9d), suggesting that NaLaTiO 4– x N y is a stable photocatalyst.…”

Current Status and Future of Organic–Inorganic Hybrid Perovskites for Photoelectrocatalysis Devices

“…Water, the molecule of life, is abundant on Earth and contains hydrogen, which can be used as a fuel for various purposes. − However, extracting hydrogen gas from water in an environmentally friendly way remains a significant challenge. Traditionally, hydrogen can be generated via the electrolysis of water using solar or wind energy. − In biological systems, such as plants, trees, and certain bacteria, complex assemblies of molecules, including proteins and metallic complexes, are employed to split water in a process called photolysis, which is responsible for supplying energy to the biological entity while generating oxygen as a byproduct. − To mimic this process and produce hydrogen and oxygen from water in a green manner and at a low cost, scientists have been working to develop artificial materials and integrate them into a water-splitting or electrocatalysis device. − These materials, including both inorganic (oxides and halides) and organic (conducting polymers and dyes) materials, are less complex compared to their biological counterparts. Individually, these materials have certain drawbacks, because their conversion efficiency remains dependent upon various factors, including band gap (1.6–1.8 eV), long-range charge diffusion, and chemical stability.…”

Nb/N Co-Doped Layered Perovskite Sr2TiO4: Preparation and Enhanced Photocatalytic Degradation Tetracycline under Visible Light

“…Ion doping can reduce the bandgap [14] of the perovskite material [11], including single metal doping, nonmetal doping, and co-doping. For instance, by introducing Cr [15], Ag [16], F [17], chalcogens [18], La/N [13], Cr/F [19], La/Rh [20], and La/Fe [12], the light response range of Sr 2 TiO 4 is extended. Properties of Sr 2 TiO 4 doping with different ions was shown in Table 1.…”

“…Hence, we perform an investigation on Nb/N co-doped layered perovskite Sr 2 TiO 4 for photocatalytic degradation tetracycline by varying Nb 5+ doping content. To the authors' knowledge, although there have been several studies on the doping modification of Sr 2 TiO 4 [12,13,[15][16][17]19,20] for photocatalytic hydrogen production, there is no literature report on the preparation and photocatalytic degradation performance of Nb/N co-doped Sr 2 TiO 4 . In this work, Sr 2 TiO 4 :N,Nb(2%) shows the best photocatalytic degradation performance towards tetracycline under visible light.…”