Integrated S‐Scheme Heterojunction of Amine‐Functionalized 1D CdSe Nanorods Anchoring on Ultrathin 2D SnNb2O6 Nanosheets for Robust Solar‐Driven CO2 Conversion,Solar RRL

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Integrated S‐Scheme Heterojunction of Amine‐Functionalized 1D CdSe Nanorods Anchoring on Ultrathin 2D SnNb2O6 Nanosheets for Robust Solar‐Driven CO2 Conversion
Solar RRL ( IF 6.0 ) Pub Date : 2021-01-20 , DOI: 10.1002/solr.202000805
Xiaochun Ke ₁ , Jinfeng Zhang ₁ , Kai Dai ₁ , Ke Fan ₂ , Changhao Liang ₃

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Photocatalytic CO₂ reduction to value‐added fuels is an appealing avenue in response to global warming and the energy crisis, but it still suffers from high energy barriers, low conversion efficiencies, and poor photostability. Herein, a novel S‐scheme SnNb₂O₆/CdSe–diethylenetriamine (SNO/CdSe–DET) heterojunction is designed by a microwave‐assisted solvothermal process, composed of 2D ultrathin SNO nanosheets (NSs) and amine‐modified CdSe–DET nanorods (NRs). The SNO/CdSe–DET composite without any co‐catalyst possesses a boosted performance in the solar‐driven photocatalytic conversion of CO₂ to CO, and the highest CO evolution rate achieved is 36.16 μmol g⁻¹ h⁻¹, which is roughly 3.58 and 9.39 times greater than those of CdSe–DET and SNO under visible‐light illumination. Such a superior activity should be ascribed to the S‐scheme system, which benefits the separation of the photogenerated carriers and promotes the synergy between CdSe–DET NRs and SNO NSs by strong chemical‐bonding coordination. Meanwhile, DET can enhance CO₂ adsorption/activation and precisely regulate the surface reactive sites. This innovative work provides fresh insight into the development of highly efficient S‐scheme photocatalytic heterostructures for CO₂ reduction.

中文翻译：

胺功能化1D CdSe纳米棒的集成S方案异质结锚固在超薄2D SnNb2O6纳米片上，可实现可靠的太阳能驱动的CO2转化

光催化将CO ₂还原为增值燃料是应对全球变暖和能源危机的诱人途径，但是它仍然面临着高能源壁垒，低转换效率和差的光稳定性的问题。本文中，通过微波辅助溶剂热工艺设计了一种新型的S方案SnNb ₂ O ₆ / CdSe-二亚乙基三胺（SNO / CdSe-DET）异质结，它由二维超薄SNO纳米片（NSs）和胺改性的CdSe-DET纳米棒组成（NRs）。不含任何助催化剂的SNO / CdSe–DET复合材料在太阳能驱动的CO ₂到CO的光催化转化中具有增强的性能，并且实现的最高CO释放速率为36.16μmolg ^-1 h ^-1在可见光照射下，它比CdSe–DET和SNO分别大3.58倍和9.39倍。这种优越的活性应该归因于S方案系统，该系统有利于光生载流子的分离，并通过强化学键配位促进了CdSe-DET NR和SNO NS之间的协同作用。同时，DET可以增强CO _2的吸附/活化并精确调节表面反应位点。这项创新的工作为开发用于减少CO _2的高效S方案光催化异质结构提供了新的见识。

更新日期：2021-01-20

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