Chen Yong-Jun, Xu Yi-Ming, Ye Xiao-Liang, Luo Zhi-Peng, Zhu Shi-Peng, Li Ke-Feng, Lu Jiang-Feng, Wang Guan-E, Xu Gang
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS) Fuzhou, Fujian, 350002, PR China.
Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian, 350108, PR China.
Nat Commun. 2025 Jul 18;16(1):6634. doi: 10.1038/s41467-025-61836-5.
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 (NH)-UiO-66@TDCOF towards NO 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.
为了在各种应用中显著提高多孔异质结的反应效率，通过能级调制对定制异质结构进行精确工程设计是必不可少的。在此，报道了一种核壳多孔异质结UiO-66@TDCOF的制备。利用金属有机框架（MOF）可调的结构，对UiO-66核的能级进行了调整，使其与基于卟啉的共价有机框架（记为TDCOF）壳的能级精确对齐。结果，异质结从I型灵活转变为II型结构，这显著提高了光照射下的电荷分离效率，从而在化学电阻式气体传感方面表现出优异性能。值得注意的是，在可见光条件下，(NH)-UiO-66@TDCOF对NO的灵敏度在所有报道的异质结中处于较高水平，超过了大多数先前报道的MOF和COF材料。这项研究不仅提出了一种异质结设计策略，还给出了一种针对化学应用的材料设计方法。
