From UV to Near‐Infrared Light‐Responsive Metal–Organic Framework Composites: Plasmon and Upconversion Enhanced Photocatalysis,Advanced Materials

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From UV to Near‐Infrared Light‐Responsive Metal–Organic Framework Composites: Plasmon and Upconversion Enhanced Photocatalysis
Advanced Materials ( IF 27.4 ) Pub Date : 2018-05-15 , DOI: 10.1002/adma.201707377
Dandan Li ₁ , Shu-Hong Yu ₁ , Hai-Long Jiang ₁

Affiliation

The exploitation of photocatalysts that harvest solar spectrum as broad as possible remains a high‐priority target yet grand challenge. In this work, for the first time, metal–organic framework (MOF) composites are rationally fabricated to achieve broadband spectral response from UV to near‐infrared (NIR) region. In the core–shell structured upconversion nanoparticles (UCNPs)‐Pt@MOF/Au composites, the MOF is responsive to UV and a bit visible light, the plasmonic Au nanoparticles (NPs) accept visible light, whereas the UCNPs absorb NIR light to emit UV and visible light that are harvested by the MOF and Au once again. Moreover, the MOF not only facilitates the generation of “bare and clean” Au NPs on its surface and realizes the spatial separation for the Au and Pt NPs, but also provides necessary access for catalytic substrates/products to Pt active sites. As a result, the optimized composite exhibits excellent photocatalytic hydrogen production activity (280 µmol g⁻¹ h⁻¹) under simulated solar light, and the involved mechanism of photocatalytic H₂ production under UV, visible, and NIR irradiation is elucidated. Reportedly, this is an extremely rare study on photocatalytic H₂ production by light harvesting in all UV, visible, and NIR regions.

中文翻译：

从紫外线到近红外光敏感的金属有机骨架复合材料：等离激元和上转换增强的光催化作用

开发能尽可能广泛地吸收太阳光谱的光催化剂仍然是一个高度优先的目标，但仍然是巨大的挑战。在这项工作中，首次合理地制造了金属有机骨架（MOF）复合材料，以实现从紫外线到近红外（NIR）区域的宽带光谱响应。在核-壳结构的上转换纳米颗粒（UCNP）-Pt @ MOF / Au复合材料中，MOF对紫外线和一点可见光有反应，等离激子Au纳米颗粒（NP）吸收可见光，而UCNP吸收NIR光发射MOF和Au再次收集紫外线和可见光。此外，MOF不仅有助于在其表面上生成“裸露且清洁的” Au NP，并实现了Au和Pt NP的空间分离，而且还提供了催化底物/产物进入Pt活性位点的必要通道。结果，优化后的复合材料表现出出色的光催化制氢活性（280 µmol g^-1 h ^-1）在模拟太阳光下，阐明了在紫外线，可见光和NIR照射下产生光催化H ₂的相关机理。据报道，这是在所有紫外线，可见光和近红外区域通过光收集产生光催化H ₂的极少见的研究。

更新日期：2018-05-15

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