MOF-on-MOF 衍生的中空 Co3O4/In2O3 纳米结构可有效光催化 CO2 还原,Advanced Science

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MOF-on-MOF 衍生的中空 Co3O4/In2O3 纳米结构可有效光催化 CO2 还原
Advanced Science ( IF 14.3 ) Pub Date : 2023-04-21 , DOI: 10.1002/advs.202300797
Cheng Han ₁ , Xiaodeng Zhang ₁ , Shengsheng Huang ₂ , Yue Hu ₁ , Zhi Yang ₁ , Ting-Ting Li ₂ , Qipeng Li ₃ , Jinjie Qian ₁

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利用可持续太阳能将二氧化碳（CO ₂）光催化转化为碳基燃料或化学品被认为是同时缓解能源短缺和环境危机的理想策略。然而，由于太阳光的能量利用率低且催化活性较差，CO ₂光还原的转化效率远不能令人满意。在这项研究中，制备了一种MOF衍生的中空双金属氧化物纳米材料，用于CO _{2的有效光还原}。首先，通过在初始 InOF-1 纳米棒上生长二次 Co 基 ZIF-67，成功获得了独特的 ZIF-67-on-InOF-1 异质结构。相应的空心对应物在酸蚀刻后具有更大的比表面积，并且氧化的双金属H-Co ₃ O ₄ /In ₂ O ₃材料表现出丰富的异质界面，暴露出更多的活性位点。_{H-Co 3} O ₄ /In ₂ O ₃的能带结构与[Ru(bpy) ₃ ]Cl ₂光敏剂很好地对应，从而产生4828 ± 570 µmol h ^-1 g ^{-1的高CO产率}连续六次运行均保持稳定的活性，表现出足够的光催化性能。这项研究表明，MOF-on-MOF异质结构的合理设计可以完全利用不同组分之间的协同效应，这可以扩展到其他MOF衍生的纳米材料，作为实际能量转换和存储的有前景的催化剂。

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MOF-on-MOF-Derived Hollow Co3O4/In2O3 Nanostructure for Efficient Photocatalytic CO2 Reduction

The photocatalytic transformation of carbon dioxide (CO₂) into carbon-based fuels or chemicals using sustainable solar energy is considered an ideal strategy for simultaneously alleviating the energy shortage and environmental crises. However, owing to the low energy utilization of sunlight and inferior catalytic activity, the conversion efficiency of CO₂ photoreduction is far from satisfactory. In this study, a MOF-derived hollow bimetallic oxide nanomaterial is prepared for the efficient photoreduction of CO₂. First, a unique ZIF-67-on-InOF-1 heterostructure is successfully obtained by growing a secondary Co-based ZIF-67 onto the initial InOF-1 nanorods. The corresponding hollow counterpart has a larger specific surface area after acid etching, and the oxidized bimetallic H-Co₃O₄/In₂O₃ material exhibits abundant heterogeneous interfaces that expose more active sites. The energy band structure of H-Co₃O₄/In₂O₃ corresponds well with the photosensitizer of [Ru(bpy)₃]Cl₂, which results in a high CO yield of 4828 ± 570 µmol h⁻¹ g⁻¹ and stable activity over a consecutive of six runs, demonstrating adequate photocatalytic performance. This study demonstrates that the rational design of MOF-on-MOF heterostructures can completely exploit the synergistic effects between different components, which may be extended to other MOF-derived nanomaterials as promising catalysts for practical energy conversion and storage.

更新日期：2023-04-21

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