Conduction Band Control of Oxyhalides with a Triple-Fluorite Layer for Visible Light Photocatalysis
Conduction Band Control of Oxyhalides with a Triple-Fluorite Layer for Visible Light Photocatalysis
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DOI：
10.1021/jacs.0c10288
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发表时间：
2021-01-08
影响因子：
15
通讯作者：
Abe, Ryu
中科院分区：
文献类型：
--
作者：
Nakada, Akinobu;Kato, Daichi;Abe, Ryu
构建块的发现为开发和控制扩展固体的性质提供了新的机会。具有萤石型Bi 2 O2块的化合物具有各种性质，包括无铅铁电体和光催化剂。在这项研究中，我们表明，三层Bi 2 MO 4块（M = Bi，La，Y）在Bi 2 MO 4Cl允许，不像双层Bi 2 O2块，广泛控制的导带。根据M的不同，Bi_2MO_4块体被Bi-O键断裂截断，形成一系列n-锯齿形链状结构（M = Bi，La，Y时n = 1，2，无穷大）。因此，形成的链结构是导带最小值（-0.36至-0.94V vs SHE）变化的原因，这与Bi处镜像对称的存在或不存在相关。Bi 2 YO 4Cl显示出比最有效的Bi 2 O2基光催化剂更高的光电导性，具有很好的可见光光催化分解水的活性。这项研究扩展了增厚（2D到3D）和切割（2D到1D）萤石基块的可能性，以实现所需的功能和其他功能。
The discovery of building blocks offers new opportunities to develop and control properties of extended solids. Compounds with fluorite-type Bi2O2 blocks host various properties including lead-free ferroelectrics and photocatalysts. In this study, we show that triple-layered Bi2MO4 blocks (M = Bi, La, Y) in Bi2MO4Cl allow, unlike double-layered Bi2O2 blocks, to extensively control the conduction band. Depending on M, the Bi2MO4 block is truncated by Bi-O bond breaking, resulting in a series of n-zigzag chain structures (n = 1, 2, infinity for M = Bi, La, Y, respectively). Thus, formed chain structures are responsible for the variation in the conduction band minimum (-0.36 to -0.94 V vs SHE), which is correlated to the presence or absence of mirror symmetry at Bi. Bi2YO4Cl shows higher photoconductivity than the most efficient Bi2O2-based photocatalyst with promising visible-light photocatalytic activity for water splitting. This study expands the possibilities of thickening (2D to 3D) and cutting (2D to 1D) fluorite-based blocks toward desired photocatalysis and other functions.