Ingenious Artificial Leaf Based on Covalent Organic Framework Membranes for Boosting CO2 Photoreduction

• DOI: 10.1021/jacs.2c11146
• Publication Date: 2023-04-20T02:43:47Z
• Authors: Shuaiqi Gao; Qian Zhang; Xiaofang Su; Xiangkun Wu; Xia-Guang Zhang; Yingying Guo; Zhiyong Li; Jishi Wei; Huiyong Wang; Suojiang Zhang; Jianji Wang
• Keywords: Covalent organic framework; Triazine; Quantum yield

Covalent organic frameworks (COFs) hold the potential in converting CO2 with water into value-added fuels and O2 to save deteriorating ecological environment. However, reaching high yield selectivity is a grand challenge under metal-, photosensitizer-, or sacrificial reagent-free conditions. Here, inspired by microstructures of natural leaves, we designed triazine-based COF membranes integration steady light-harvesting sites, efficient catalytic center, fast charge/mass transfer configuration fabricate novel artificial leaf for first time. Significantly, record CO 1240 μmol g–1 4 h reaction, approximately 100% selectivity, long lifespan (at least 16 cycles) were achieved gas–solid conditions without using any metal, photosensitizer, reagent. Unlike existing knowledge, chemical structural unit triazine-imide-triazine unique physical form membrane are predominant such remarkable photocatalysis. This work opens new pathway simulating photosynthesis leaves may motivate relevant research future.