Zeng Zijian, Shan Shaojun, Peng Ruizhi, Yan Zhihong, Liu Yi
School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan, 528458, China.
Department of Radiology, The First Affiliated Hospital of Guangdong Pharmaceutical Universtiy, Guangzhou, 510080, China.
Chem Commun (Camb). 2025 May 28;61(44):8035-8038. doi: 10.1039/d5cc00846h.
The process of industrial synthesis of urea produces high energy consumption and high pollution, which is bad for the environment. Photoelectrocatalytic CO reduction to generate urea can avoid the aggravation of environmental pollution, but metal catalysts are commonly used for photoelectrocatalysis, and the use of metal catalysts can lead to environmental heavy metal pollution. Porphyrin-based photoelectrocatalysts with excellent photoelectronic properties were synthesized from aldolized tetrabromophenyl porphyrin (PP), and copolymers of dopamine (DA) and resveratrol (Res). The photoelectrocatalyst (COF) was synthesized by the Schiff base reaction. The photoelectrocatalyst exhibited good CO reduction reaction (COR) performance under photoelectrocatalytic conditions with a catalytic efficiency 25% higher than that of PP. The photocatalyst enabled the synthesis of urea (NHCONH) from CO and NO. NH, HCOOH and CO were also generated in this process. The application of COF can solve the problem of environmental pollution caused by the industrial synthesis of urea and the use of metal catalysts. The results, combined with infrared data, elucidated the synthesis mechanism of NHCONH.
尿素的工业合成过程能耗高、污染大，对环境不利。光电催化CO还原生成尿素可避免环境污染加剧，但光电催化通常使用金属催化剂，而金属催化剂的使用会导致环境重金属污染。由醛醇化四溴苯基卟啉（PP）、多巴胺（DA）和白藜芦醇（Res）的共聚物合成了具有优异光电性能的卟啉基光电催化剂。通过席夫碱反应合成了光电催化剂（COF）。该光电催化剂在光电催化条件下表现出良好的CO还原反应（COR）性能，催化效率比PP高25%。该光催化剂能使CO和NO合成尿素（NH₂CONH₂）。此过程中还生成了NH₃、HCOOH和CO。COF的应用可解决尿素工业合成及金属催化剂使用所造成的环境污染问题。这些结果结合红外数据阐明了NH₂CONH₂的合成机理。
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