Syntheses of heterometallic organic frameworks catalysts via multicomponent postmodification: For improving CO2 photoreduction efficiency

• Published in: Journal of colloid and interface science 2024-12, Vol.675, p.94-103
• Main Authors: Lian, Wanqi, Huang, Ying, Yin, Qiaoqiao, Guo, Zhicheng, Xu, Yun, Miao, Tifang
• Format: Article
• Language: English
• Subjects: CO2 photoreduction; Non-noble metals; Post-synthetic modification strategy; Zirconium-based metal–organic frameworks
• ISSN: 0021-9797; 1095-7103; 1095-7103
• DOI: 10.1016/j.jcis.2024.06.165

The parent MOF 808 was used to reconstruct a new metal–organic framework through a multi-step post-synthesis modification strategy. By fine-tuning the ratio of NH2IPA and adding 5-nitroindoline-2,3-dione (NID) and copper salt, a stable photocatalyst Cu@808-NH2IPA-NO2 was obtained, exhibiting an excellent catalytic performance with CO and HCOOH production rates of 236.5 μmol g−1 h−1 and 993.6 μmol g−1 h−1 under non-noble metal. [Display omitted] To enhance the economic viability of photocatalytic materials for carbon capture and conversion, the challenge of employing expensive photosensitizer must be overcome. This study aims to improve the visible light utilization with zirconium-based metal–organic frameworks (Zr-MOFs) by employing a multi-component post-synthetic modification (PSM) strategy. An economical photosensitiser and copper ions are introduced into MOF 808 to enhance its photoreduction properties. Notably, the PSM of MOF 808 shows the highest CO yield up to 236.5 μmol g−1 h−1 with aHCOOH production of 993.6 μmol g−1 h−1 under non-noble metal, and its mechanistic insight for CO2 reaction is discussed in detail. The research results have important reference value for the potential application of photocatalytic metal–organic frameworks.