Sun Dengrong, Kim Dong-Pyo
Center for Intelligent Microprocess of Pharmaceutical Synthesis (CIMPS), Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Nam-gu, Pohang-Si, Gyungsangbuk-do 37673, South Korea.
ACS Appl Mater Interfaces. 2020 May 6;12(18):20589-20595. doi: 10.1021/acsami.0c04537. Epub 2020 Apr 28.
Converting solar energy to chemical energy via photocatalysis has attracted increasing interest. Simultaneously realizing efficient charge separation and fast reactant/product diffusion/transport is highly significant for improving the photocatalytic activity, which however is difficult. Herein, we reported an interfacially confined strategy by constructing interfacial pores as nanoreactors between metal-organic frameworks (MOFs) and covalent organic frameworks (COFs) with controlled surface wettability for efficient photocatalysis. In the sandwich Ti-MOFs@Pt@DM-LZU1, interfacial pores formed between Ti-MOF@Pt and DM-LZU1, in which Pt nanoparticles (NPs) were encapsulated. The presence of Pt facilitates the charge separation on the photoactive Ti-MOF, while the hydrophobic porous DM-LZU1 shell promotes reactant enrichment. Interfacial pores acting as nanoreactors ensure fast electron and mass transport between the active Pt NPs and the concentrated reactants, leading to high photocatalytic activity. This work presents a new concept for the design of various photocatalysts with considerable activity.
通过光催化将太阳能转化为化学能已引起越来越多的关注。同时实现高效的电荷分离和快速的反应物/产物扩散/传输对于提高光催化活性非常重要，然而这却很困难。在此，我们报道了一种界面受限策略，即通过构建界面孔作为金属有机框架（MOF）和共价有机框架（COF）之间的纳米反应器，并控制其表面润湿性以实现高效光催化。在三明治结构的Ti-MOFs@Pt@DM-LZU1中，Ti-MOF@Pt和DM-LZU1之间形成了界面孔，其中封装了铂纳米颗粒（NP）。Pt的存在促进了光活性Ti-MOF上的电荷分离，而疏水性多孔DM-LZU1壳层促进了反应物的富集。作为纳米反应器的界面孔确保了活性Pt NPs与浓缩反应物之间的快速电子和质量传输，从而导致高光催化活性。这项工作为设计具有相当活性的各种光催化剂提出了一个新概念。
