Flux synthesis of Bi2MO4Cl (M = Gd and Nd) nanosheets for high-efficiency photocatalytic oxygen evolution under visible light

New insights into the synthesis of Sillén–Aurivillius oxyhalides: molten salts induce interlayer halogen competing reaction

“…In addition, the electrochemical workstation was also employed for the electrochemical and photoelectrochemical measurements of the BaBi 4 TiNbO 11 X oxyhalides, as described in the previous studies. 9,22,31…”

Effectively enhanced photocatalytic performance of layered perovskite Bi2NdO4Cl by coupling piezotronic effect

“…18 Secondly, the strong internal electric field (IEF) is another important feature of layered bismuth-based materials, which facilitates the efficient separation of charge carriers and drives their movement from the bulk to the surface. 19 Among them, Bi 2 NdO 4 Cl, a novel 2D bismuth-based layered material with an ideal tetragonal structure ( a = b = 3.91 Å, c = 8.99 Å), composed of [Bi 2 NdO 4 ] unit layers and [Cl] halogen layers, 20,21 has attracted extensive attention. As a 2D layered bismuth-based material, it has excellent electronic and optical properties similar to those of typical layered bismuth-based materials such as BiOBr, 22 Bi 2 WO 6 23 and Bi 3 O 4 Cl.…”

“…Currently, Bi 2 NdO 4 Cl has been used in different catalytic applications, such as photocatalytic oxygen production and pollutant degradation. 20,21 Specifically, Bi 2 NdO 4 Cl can be categorized as a narrow bandgap semiconductor, meaning it can capture sufficient sunlight. However, electron–hole pairs will be rapidly recombined when excited by light due to its narrow band gap, which reduces its photocatalytic efficiency.…”

Hole and Electron Doping Outcomes in Bi2YO4Cl

“…Bi 2 MO 4 Cl (M = Bi, La–Lu) crystallizing in a layered structure is an example. − While Bi 3 O 4 Cl crystallizes in monoclinic symmetry, replacing one bismuth with a rare-earth ion raises the symmetry to tetragonal. − The Bi 2 MO 4 Cl (M = Bi, La–Lu) structure can be described as an intergrowth consisting of “heterogeneous” or “mixed-layer” structures involving structural units from a related Sillen family of bismuth-based compounds. − The identical [M 2 O 2 ] fluorite slabs or triple [M 3 O 4 or Bi 2 MO 4 ] fluorite layers are separated by single or double sheets of halide or chalcogenide anions (less often) in such intergrowths. − The structure of Bi 2 MO 4 Cl can also be visualized to consist of [X–M–O–Bi–X] slices stacked together through the halogen atoms along the c -axis. In each [X–M–O–Bi–X] layer, bismuth is surrounded by four oxygen and four halogen atoms, and it produces asymmetric decahedral geometry. − Bi 2 MO 4 Cl (M = Bi, La–Lu) were examined as a visible light photocatalyst to split water owing to its semiconducting nature. − The strategies were found for controlling the conduction band minima depending on the M-cation in Bi 2 MO 4 Cl (M = Y, La, Bi) . They showed that the bonding is weakened depending on the M cation, leading to local symmetry changes at the Bi site .…”