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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Multifunctional polyoxometalates encapsulated in MIL-100(Fe): highly efficient photocatalysts for selective transformation under visible light
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Multifunctional polyoxometalates encapsulated in MIL-100(Fe): highly efficient photocatalysts for selective transformation under visible light

机译：封装在MIL-100（Fe）中的多功能多金属氧酸盐：高效光催化剂，可在可见光下选择性转化

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摘要

H3PMo12O40 molecules have been successfully encapsulated in the cavities of MIL-100(Fe) via a facile hydrothermal method (denoted as HPMo@MIL-100(Fe)). A series of characterization has corroborated the insertion of H3PMo12O40 within the cavities of MIL-100(Fe). The resulting HPMo@MIL-100(Fe) nano-composites have exhibited much higher photoactivity than the original-MIL-100(Fe) toward the photocatalytic selective oxidation of benzylic alcohols and the reduction of Cr(VI) under visible light irradiation (lambda >= 420 nm). The higher photoactivity of HPMo@MIL-100(Fe) can be attributed to the integrative effect of enhanced light absorption intensity and more efficient separation of photogenerated electron-hole pairs. The host porous structure of MIL-100(Fe) can achieve a uniform composition with H3PMo12O40, which is significantly important for producing highly reactive dispersed H3PMo12O40 molecules and enhancing the photocatalytic activity of HPMo@MIL-100(Fe) nanocomposites. And the immobilized H3PMo12O40 molecules are more convenient for recycling. Importantly, almost no Fe and Mo ions leach from the MIL-100(Fe) during the reaction, which verifies the photostability of the HPMo@MIL-100(Fe). In addition, possible photocatalytic redox reaction mechanisms have been investigated.
机译：H3PMo12O40分子已通过一种简便的水热法（称为HPMo @ MIL-100（Fe））成功地封装在MIL-100（Fe）的空腔中。一系列表征证实了H3PMo12O40在MIL-100（Fe）腔中的插入。所得的HPMo @ MIL-100（Fe）纳米复合材料在可见光照射下对苄醇的光催化选择性氧化和Cr（VI）的还原表现出比原始MIL-100（Fe）高得多的光活性。 > = 420 nm）。 HPMo @ MIL-100（Fe）的较高光活性可归因于增强的光吸收强度和更有效地分离光生电子-空穴对的综合效应。 MIL-100（Fe）的主体多孔结构可以与H3PMo12O40实现均匀的组成，这对于生产高反应性的分散H3PMo12O40分子和增强HPMo @ MIL-100（Fe）纳米复合材料的光催化活性非常重要。固定化的H3PMo12O40分子更便于回收。重要的是，反应过程中几乎没有Fe和Mo离子从MIL-100（Fe）中浸出，这证明了HPMo @ MIL-100（Fe）的光稳定性。另外，已经研究了可能的光催化氧化还原反应机理。

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