Strategic energy-level modulation in porous heterojunctions: advancing gas sensing through Type-I to Type-II transitions

作者：Xiaopeng Cheng, Yiming Xu, Xiao‐Liang Ye, Zhi-Peng Luo, Shipeng Zhu, Kefeng Li, Jiangfeng Lu, Guan‐E Wang, Gang Xu · 发表于：Nature Communications · 年份：2025 · DOI：10.1038/s41467-025-61836-5 · 被引用次数：18 · 研究领域：Metal-Organic Frameworks: Synthesis and Applications、Covalent Organic Framework Applications、Advanced Photocatalysis Techniques

To significantly enhance reaction efficiency of porous heterojunctions in various applications, precise engineering of customization heterostructures through energy-level modulation is indispensable. Herein, the preparation of a core-shell porous heterojunction, UiO-66@TDCOF, is reported. Taking advantage of adjustable structure of metal-organic frameworks (MOFs), the energy-level of UiO-66 core is tailored to precisely align with that of porphyrin-based covalent organic framework (denoted as TDCOF) shell. As a results, the heterojunction transitions flexibly from a type-I to a type-II configuration, which remarkably enhances the efficiency of charge separation under light irradiation, resulting in exceptional performances in chemiresistive gas sensing. Notably, the sensitivity of (NH2)1.24-UiO-66@TDCOF towards NO2 is at a high level among all reported heterojunctions under visible-light condition, surpassing the majority of previously reported MOF and COF materials. This research not only presents a strategy for the design of heterojunctions but also gives an approach to material design tailored for chemical applications. A porous heterojunction is customized to transform from type-I to type-II through precisely regulating the energy level, which remarkably enhances the reaction efficiency, resulting in exceptional performance in chemiresistive gas sensing.