Using photocatalysts to harvest photon energy from sunlight (renewable fuel) is a promising pathway for a wide range of applications, especially for the removal of contaminants from water. Porphyrin and its derivatives are analogs of natural chlorophyll; both compounds have similar structures and photochemical properties. Therefore, various porphyrin derivatives have been extensively studied as effective sensitizers for light energy absorption and as nature-inspired photocatalysts for water treatment. In this study, a simple solvophobic self-assembly protocol is employed to obtain nanostructured porphyrin from monomeric tetrakis-triphenylamine porphyrin (TTPAP) in a mixture of THF/H₂O. The porphyrin is assembled into various forms such as rod-like and belt-like microstructures, depending on the water fraction in the THF/H₂O mixture. The main driving forces for self-assembly of the TTPAP monomers into nanostructured materials are balanced stacking involving hydrophobic interactions of the periphery and π-π interactions of the porphyrin cores. While both porphyrin microstructures (rod-like and belt-like) show reasonable photocatalytic activity toward rhodamine B (RhB) dye in aqueous media under simulated visible irradiation, the belt-like porphyrin aggregates exhibit better performance than the rod-like counterparts under the same reaction conditions. A possible mechanism for the photocatalytic activity of the TTPAP aggregates in RhB degradation is also presented.

使用光催化剂从阳光（可再生燃料）中收集光子能量是广泛应用中的有前途的途径，特别是从水中去除污染物的途径。卟啉及其衍生物是天然叶绿素的类似物；两种化合物具有相似的结构和光化学性质。因此，已经广泛研究了各种卟啉衍生物作为用于光能吸收的有效敏化剂和用于水处理的受自然启发的光催化剂。在这项研究中，采用简单的疏溶剂自组装方案从四氢三苯胺卟啉单体（TTPAP）的THF / H ₂混合物中获得纳米结构的卟啉。O.取决于THF / H ₂ O混合物中的水含量，卟啉被组装成各种形式，例如杆状和带状微结构。TTPAP单体自组装成纳米结构材料的主要驱动力是平衡堆积，该堆积涉及外围的疏水相互作用和卟啉核的π-π相互作用。虽然卟啉的微观结构（棒状和带状）在模拟可见光下对水介质中的若丹明B（RhB）染料均显示出合理的光催化活性，但在相同条件下，带状卟啉聚集体表现出比棒状对应物更好的性能。反应条件。还提出了在RhB降解中TTPAP聚集体的光催化活性的可能机制。