Temperature-driven growth of uranyl-organic frameworks for efficient photocatalytic CO₂ reduction

温度驱动生长的铀酰基金属有机框架用于高效光催化CO₂还原

设计将CO₂转化为CO和其他高附加值化学品的高效光催化剂是解决环境问题和能源危机的有效策略。本文设计并制备了以铀酰离子为催化活性中心的铀酰-有机骨架（UOF）光催化剂HNU-94，采用简单的溶剂热法进行光催化CO₂还原。特别是反应温度对形貌有明显的影响，这进一步体现在HNU-94的光催化性能上。当温度从80℃升高到120℃时，HNU-94的形态由条状到簇状再到花状。120℃下得到的样品可以在可见光下将CO₂还原为CO， 2 h后的产率达到2.57 mmol g^-1，显著高于80℃下得到的HNU-94 （0.53 mmol g^-1）。

The design of efficient photocatalysts to convert CO2 into CO and other high-value-added chemicals is an effective strategy for solving environmental issues and the energy crisis. Herein, a uranyl-organic framework (UOF) photocatalyst, HNU-94, with uranyl ions as the catalytic active centers was designed and prepared by a simple solvothermal method for photocatalytic CO2 reduction. Particularly, the reaction temperature has an obvious influence on the morphology, which is further reflected in the photocatalytic performance of HNU-94. The morphology of HNU-94 evolves from strip to cluster to flower-like when the temperature rises from 80°C to 120°C. The sample obtained at 120°C can reduce CO2 to CO under visible light, and the yield reaches 2.57 mmol g-1 after 2 h, which is significantly higher than that of HNU-94 obtained at 80°C (0.53 mmol g-1).

光催化体系中HNU-94还原CO₂的产量以及反应机理图

CO₂ reduction yield by HNU-94 in photocatalytic system and the reaction mechanism

期刊名称：Inorganic Chemistry Frontiers

中科院分区：中科院二区

发表日期: 2025年2月28日

文章链接: https://doi.org/10.1039/d5qi00141b

作者列表: Lu-Yao Wang, Guang Che, Ya-Ru Gong,* Wei-Ting Yang,* Yuan Lin, Jiao-Rong Liu, Shu-Yu Chen, Meng-Dan Xiao, Xu-Dong Tian and Zhong-Min Su*

期刊信息: Inorg. Chem. Front., 2025, 10.1039/d5qi00141b