Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471934, China.
Xinjiang Production & Construction Corps Key Laboratory of Advanced Energy Storage Materials and Technology, College of Science, Shihezi University, Shihezi 832003, China.
Molecules. 2023 Jul 14;28(14):5401. doi: 10.3390/molecules28145401.
The organic dyes used in printing and dyeing wastewater have complex components, diverse structures and strong chemical stability, which make them not suitable for treatment and difficult to degrade in the environment. Porphyrins are macromolecules with 18 π electrons formed by four pyrrole molecules connected with a methylene bridge that has a stable structure. Porphyrin combines with iron to form an active intermediate with a structure similar to the cytochrome P450 enzyme, so they are widely used in the biomimetic field. In the current study, 5,10,15,20-tetra (4-carboxyphenyl) porphine ferric chloride (III) (Fe(III)TCPP) was used as a catalyst and iodosobenzene was used as an oxidant to explore the catalytic degradation of triphenylmethane dyes, such as rhodamine B (RhB) and malachite green (MG). The results of UV-Vis spectral analysis have shown that the conversion rate of the rhodamine B was over 90% when the amount of Fe(III)TCPP was 0.027 mM and the amount of iodosobenzene was eight equivalents. When the catalyst was 0.00681 mM and the amount of the oxidant was five equivalents, the conversion rate of the malachite green reached over 95%. This work provides a feasible method for the degradation of triphenylmethane dyes.
用于印染废水的有机染料成分复杂、结构多样、化学稳定性强，不适合处理，在环境中难以降解。卟啉是由四个吡咯分子通过亚甲基桥连接而成的具有 18 个π电子的大分子，具有稳定的结构。卟啉与铁结合形成与细胞色素 P450 酶结构相似的活性中间体，因此被广泛应用于仿生领域。在目前的研究中，使用 5,10,15,20-四（4-羧基苯基）卟啉三氯化铁（III）（Fe（III）TCPP）作为催化剂，碘苯作为氧化剂，探索三苯甲烷染料（如罗丹明 B（RhB）和孔雀石绿（MG））的催化降解。紫外-可见光谱分析结果表明，当 Fe（III）TCPP 的用量为 0.027mM，碘苯的用量为 8 当量时，罗丹明 B 的转化率超过 90%。当催化剂用量为 0.00681mM，氧化剂用量为 5 当量时，孔雀石绿的转化率超过 95%。这项工作为三苯甲烷染料的降解提供了一种可行的方法。
