The presence of greenhouse CO₂ gas in the atmosphere causes serious environmental issues. Consequently, the development of photocatalysts for reducing CO₂ is essential for mimicking artificial photosynthesis. In this study, we prepared a 5,15-di(4-aminophenty)-10,20-diphentyporphyrin copper (CuDAPP)–1,3,5-triformylphloroglucinol (TP)–covalent organic framework (COF) layer on a glass sheet via a layer-by-layer (LBL) method. The 2D CuDAPP–TP–COF layer was used as a photocatalyst for CO₂ reduction, and it demonstrated excellent photocatalytic activity under gas–solid conditions without sacrificial reagents, noble metals, or photosensitisers. The CO production yield was 282.6 μmol g⁻¹ under visible-light irradiation for 6 h, outperforming the raw material CuDAPP and a mixture of CuDAPP and TP, indicating a high application potential of the 2D porphyrin COF layer material in photocatalytic CO₂ reduction.

中文翻译：

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用于 CO2 光还原为 CO 的无贵金属卟啉共价有机框架层


大气中温室气体的存在会导致严重的环境问题。因此，开发用于减少 CO₂ 的光催化剂对于模拟人工光合作用至关重要。在这项研究中，我们通过逐层 （LBL） 方法在玻璃板上制备了 5,15-二（4-氨基酚）-10,20-二苯基卟啉铜 （CuDAPP）-1,3,5-三甲酰间苯胰三酚 （TP）-共价有机框架 （COF） 层。2D CuDAPP-TP-COF 层用作 CO₂ 还原的光催化剂，它在气固条件下表现出优异的光催化活性，无需牺牲试剂、贵金属或光敏剂。在可见光照射 6 h 下，CO 产率为 282.6 μmol ^g-1，优于原材料 CuDAPP 以及 CuDAPP 和 TP 的混合物，表明 2D 卟啉 COF 层材料在光催化 CO₂ 还原中具有很高的应用潜力。