Integration of Plasmonic Effects and Schottky Junctions into Metal-Organic Framework Composites: Steering Charge Flow for Enhanced Visible-Light Photocatalysis
Integration of Plasmonic Effects and Schottky Junctions into Metal-Organic Framework Composites: Steering Charge Flow for Enhanced Visible-Light Photocatalysis
复制标题
将等离子体效应和肖特基结集成到金属有机框架复合材料中：控制电荷流以增强可见光光催化
DOI：
10.1002/anie.201711725
复制
发表时间：
2018-01-22
影响因子：
16.6
通讯作者：
Jiang, Hai-Long
中科院分区：
文献类型：
--
作者：
Xiao, Juan-Ding;Han, Lili;Jiang, Hai-Long
宽范围的光吸收和快速的电子-空穴分离是有效的电致发光所期望的。在此，基于类荧光体的金属有机骨架（MOF），具有两种类型的金属-MOF界面的Pt@MOF/Au催化剂将Au纳米棒的表面等离子体共振激发与Pt-MOF肖特基结集成，这不仅将MOF的光吸收从UV延伸到可见光区域，而且大大加速了电荷转移。通过MOF的Pt和Au颗粒的空间分离进一步引导电荷流的形成并加速电荷迁移。结果表明，Pt@MOF/Au在可见光照射下具有非常高的光催化分解水产氢速率，远远上级Pt/MOF/Au、MOF/Au和其他Pt或Au含量相近的对应物，突出了各组分的重要作用和Pt在催化剂中的位置。
Awide range of light absorption and rapid electron-hole separation are desired for efficient photocatalysis. Herein, on the basis of a semiconductor-like metal-organic framework (MOF), a Pt@MOF/Au catalyst with two types of metal-MOF interfaces integrates the surface plasmon resonance excitation of Au nanorods with a Pt-MOF Schottky junction, which not only extends the light absorption of the MOF from the UV to the visible region but also greatly accelerates charge transfer. The spatial separation of Pt and Au particles by the MOF further steers the formation of charge flow and expedites the charge migration. As a result, the Pt@MOF/Au presents an exceptionally high photocatalytic H-2 production rate by water splitting under visible light irradiation, far superior to Pt/MOF/Au, MOF/Au and other counterparts with similar Pt or Au contents, highlighting the important role of each component and the Pt location in the catalyst.