Facile in situ growth of highly dispersed palladium on phosphotungstic-acid-encapsulated MIL-100(Fe) for the degradation of pharmaceuticals and personal care products under visible light
Facile in situ growth of highly dispersed palladium on phosphotungstic-acid-encapsulated MIL-100(Fe) for the degradation of pharmaceuticals and personal care products under visible light
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在磷钨酸封装的 MIL-100(Fe) 上轻松原位生长高度分散的钯，用于可见光下药物和个人护理产品的降解
DOI：
10.1007/s12274-017-1730-0
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发表时间：
2018-02-01
期刊：
影响因子：
9.9
通讯作者：
Wu, Ling
中科院分区：
文献类型：
--
作者：
Liang, Ruowen;Huang, Renkun;Wu, Ling
报道了一种简便的原位还原法制备钯修饰磷钨酸(PTA)-MIL-100(Fe)纳米复合材料(Pd-H3PW12O40-MIL-100(Fe)，记为Pd-PTA-MIL-100(Fe))。在原位合成过程中，PTA被包裹在MIL-100(Fe)的基质中，作为紫外光可切换的还原剂，得到了高度分散的Pd纳米粒子。以药物和个人护理产品的光催化降解为模型反应，Pd-PTA-MIL-100(Fe)三元杂化材料的光催化活性比其基础基质PTA-MIL-100(Fe)纳米复合材料具有更高的光催化活性。光电化学分析表明，Pd纳米粒子具有良好的电子导电性，PTA具有较快的电子传递速度，MIL-100(Fe)具有较强的可见光吸收，以及MIL-100(Fe)、PTA和Pd三种纳米粒子的能级匹配，从而提高了光催化性能。重要的是，在反应过程中几乎没有Fe和W离子从样品中被浸出，这表明Pd-PTA-MIL-100(Fe)复合材料具有光稳定性。此外，还对可能的光催化反应机理进行了探讨。
A simple, facile in situ reduction approach is reported for the synthesis of Pd-nanoparticle-decorated phosphotungstic acid (PTA)-MIL-100(Fe) nanocomposites (Pd-H3PW12O40-MIL-100(Fe), denoted Pd-PTA-MIL-100(Fe)). During the in situ synthesis, PTA is encapsulated into the matrix of MIL-100(Fe) and serves as a UV-switchable reducing agent, resulting in highly dispersed Pd NPs. Using the photocatalytic degradation of pharmaceuticals and personal care products as model reactions, the ternary Pd-PTA-MIL-100(Fe) hybrids exhibited enhanced photocatalytic activity compared with their foundation matrices, the binary PTA-MIL-100(Fe) nanocomposite. Based on photoelectrochemical analyses, the improved photocatalytic performance can be attributed to the well-known electronic conductivity of the Pd NPs, the fast electron transport of PTA, the intense visible-light absorption of MIL-100(Fe), and the matched energy levels of the three components: MIL-100(Fe), PTA, and Pd NPs. Importantly, almost no Fe and W ions were leached from the samples during the reaction, demonstrating the photostability of the Pd-PTA-MIL-100(Fe) composite. In addition, possible photocatalytic reactions mechanisms have also been investigated.