Embedding Pt nanoparticles at the interface of CdS/NaNbO3 nanorods heterojunction with bridge design for superior Z-Scheme photocatalytic hydrogen evolution
Embedding Pt nanoparticles at the interface of CdS/NaNbO3 nanorods heterojunction with bridge design for superior Z-Scheme photocatalytic hydrogen evolution
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DOI：
10.1016/j.apcatb.2020.119290
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发表时间：
2020-12
影响因子：
22.1
通讯作者：
Fengli Yang;Quan Zhang;Juhua Zhang;Lu Zhang;Mengting Cao;W. Dai
中科院分区：
文献类型：
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作者：
Fengli Yang;Quan Zhang;Juhua Zhang;Lu Zhang;Mengting Cao;W. Dai
异质结光催化剂的发展仍然受到界面载流子分离效率差的限制。在本工作中，我们成功地设计了CdS/Pt/N-NaNbO 3多层桥纳米结构，将Pt纳米颗粒（NPs）嵌入到CdS量子点（CdS QDs）和钙钛矿型N掺杂NaNbO 3之间的界面。Pt NPs不仅起到了键合CdS量子点和NaNbO 3的作用，而且为载流子的迁移提供了动力，极大地缩短了迁移路径。CdS/Pt/N-NaNbO 3纳米棒除了具有有效的Z-模式电荷传输路径外，还可以通过N掺杂和引入Pt NPs、CdS量子点来定制强可见光吸收（400−800 nm），UV-vis实验证明了这一点。DRS测量。在可见光（λ > 420 nm）下，18%CdS/2%Pt/N-NaNbO 3纳米棒的光催化析氢速率分别是裸NaNbO 3纳米棒和CdS量子点的134倍和28倍。这是迄今为止报道的基于NaNbO 3的光催化剂中的最高值。该研究对光催化析氢和新型铌酸钠基材料的制备具有重要意义。
The development of heterojunction photocatalysts is still limited by poor interfacial charge carriers separation efficiency. In this work, we have successfully designed CdS/Pt/N-NaNbO3multilayer bridged nanostructure by embedding of Pt nanoparticles (NPs) into the interface between CdS quantum dots (CdS QDs) and perovskite N-doped NaNbO3. The Pt NPs not only play the role of bonding CdS QDs and NaNbO3, but also provide a motive force for the charge carriers transfer and enormously shorten the migration path. Apart from the efficient Z-scheme charge transmission path of the CdS/Pt/N-NaNbO3nanorods, strong visible light absorption (400−800 nm) can also be tailored by N doping and introducing of Pt NPs, CdS QDs, demonstrated by the UV–vis. DRS measurement. As expected, the photocatalytic hydrogen evolution rate of 18 %CdS/2%Pt/N-NaNbO3nanorods is 134 and 28 times higher than that of bare NaNbO3nanorods and CdS QDs, respectively, under visible light (λ > 420 nm). This is the highest value so far reported among the NaNbO3-based photocatalysts. This study has important implications for photocatalytic hydrogen evolution and novel fabrication of NaNbO3-based materials.