Boosting Visible‐Light Photocatalytic Performance for CO2 Reduction via Hydroxylated Graphene Quantum Dots Sensitized MIL‐101(Fe),Advanced Materials Interfaces

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Boosting Visible‐Light Photocatalytic Performance for CO2 Reduction via Hydroxylated Graphene Quantum Dots Sensitized MIL‐101(Fe)
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2020-06-28 , DOI: 10.1002/admi.202000468
Ning Liu ₁ , Mengqi Tang ₁ , Jinxing Wu ₁ , Liang Tang _{2,

3} , Wenyuan Huang ₁ , Qiutao Li ₂ , Jianqiu Lei ₄ , Xiaodong Zhang ₁ , Liang Wang ₂

Affiliation

Herein, a one‐step solvothermal method that shows incorporation of the graphene quantum dots (GQDs) on Fe‐based metal organic frameworks (MOFs) [MIL‐101(Fe)] to form GQD/MIL‐101(Fe) (G/M101) composites is reported. MIL‐101(Fe) with the sensitization of GQDs could significantly improve the photocatalytic reduction efficiency of CO₂ to generate CO. The prepared composites exhibit excellent optical properties and the photocatalytic activity of G/M101 composites is relevant to GQDs ratio. The CO production rate over G/M101‐5% (224.71 µmol h⁻¹ g⁻¹) is 5 times higher than that of MIL‐101(Fe) (46.20 µmol h⁻¹ g⁻¹). The promising photocatalytic activity of G/M101‐5% strongly depends on the beneficial separation and transfer of photoinduced carriers via a charge migration between GQDs and MIL‐101(Fe). The microstructures and interfacial structures of the G/M101‐5% composite demonstrate that GQDs are closely loaded on the surface of MIL‐101 (Fe), and thus favors to the photoreduction according to their sp² bonding. This work may figure a new way for the synthesis of photocatalysts for the application on carbon stabilization.

中文翻译：

通过羟基化的石墨烯量子点敏化的MIL-101（Fe）提高可见光光催化性能以减少CO2

本文中的一步溶剂热法显示了石墨烯量子点（GQD）掺入铁基金属有机骨架（MOF）[MIL-101（Fe）]形成GQD / MIL-101（Fe）（G / M101）复合材料的报道。具有GQD敏化作用的MIL-101（Fe）可以显着提高CO ₂的光催化还原效率以生成CO。制备的复合材料具有优异的光学性能，G / M101复合材料的光催化活性与GQDs的比例有关。在G / M101-5％（224.71 µmol h ^-1 g ^-1）上的CO生产率是MIL-101（Fe）（46.20 µmol h ^-1 g ^-1）的5倍）。G / M101-5的有前途的光催化活性在很大程度上取决于通过GQD和MIL-101（Fe）之间的电荷迁移对光诱导载流子的有益分离和转移。G / M101-5％复合材料的微观结构和界面结构表明，GQD紧密负载在MIL-101（Fe）的表面上，因此根据其sp ^2的结合有利于光还原。这项工作可能为合成光催化剂提供了一种新方法，可用于碳稳定化。

更新日期：2020-06-28

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