Interlayer modification and single-layer exfoliation of the Ruddlesden–Popper perovskite oxynitride K₂LaTa₂O₆N to improve photocatalytic H₂ evolution activity

Abstract

Modification of the interlayer nanospaces of lamellar solids is an effective means of enhancing the physical properties and chemical functions of such materials. The present work demonstrates the interlayer modification...

Perovskite and layered perovskite oxynitrides for efficient sunlight-driven artificial synthesis

“…4,5 Moreover, RP phase oxynitrides A n +1 B n (O,N) 3 n +1 and Dion–Jacobson phase oxynitrides A′A n −1 B n (O,N) 3 n +1 (A = Ca, Sr, Ba, or La; A′ = Li, Na, K, or Cs; B = Ti, Nb, or Ta), composed of mixed anions of O 2− and N 3− , have been studied as a novel layered perovskite oxynitride family active for various artificial photosynthesis approaches. 6–10…”

Defect dipoles and stable dielectric properties improve Nb-doped Ba0.7Sr0.3TiO3 photocatalytic H2 evolution activity

“…[5][6][7][8] Perovskite materials (ABO 3 ), such as BaTiO 3 , SrTiO 3 , Ba 1−x Sr x TiO 3 , and CaMnO 3 , possess high dielectric constants, photoresponsivity, and stable chemical properties, making them widely used in photocatalysis. [9][10][11][12] Notably, these materials can generate a built-in electric eld due to their spontaneous polarization, 13 leading to an increased carrier concentration in the eld and enhanced photocatalytic performance. 14 In particular, barium-strontium-titanate (BST) has been extensively researched in the eld of photocatalysis due to its adjustable Curie temperature and signicant dielectric constant in diverse environments.…”

“…5–8 Perovskite materials (ABO 3 ), such as BaTiO 3 , SrTiO 3 , Ba 1− x Sr x TiO 3 , and CaMnO 3 , possess high dielectric constants, photoresponsivity, and stable chemical properties, making them widely used in photocatalysis. 9–12 Notably, these materials can generate a built-in electric field due to their spontaneous polarization, 13 leading to an increased carrier concentration in the field and enhanced photocatalytic performance. 14…”

Unlocking the chemical environment of nitrogen in perovskite-type oxides

“…Perovskite-type oxides are functional materials with excellent physical and chemical properties. 1–4 In particular, two-dimensional perovskite-type oxides have recently gained significant attention for solar energy conversion and environmental remediation. 5–8 Perovskite-type La 2 Ti 2 O 7 (LTO) nanoparticles with a layered structure has been regarded as a promising photocatalyst for organic decomposition, water splitting, and CO 2 reduction reactions owing to its high charge carrier mobility, high stability, low cost, and low toxicity.…”