Buta Ildiko, Nistor Maria Andreea, Muntean Simona Gabriela
"Coriolan Drăgulescu" Institute of Chemistry, Romanian Academy, 24 Mihai Viteazu Bvd., 300223 Timisoara, Romania.
Molecules. 2025 Apr 8;30(8):1652. doi: 10.3390/molecules30081652.
The present study reports the application of three copper(II) coordination polymers, namely [CuL(N)] CHCOO (), [CuL(NO)]NO·2CHOH·2HO (), and CuL(HO) (), where stands for N,N'-bis[(2-hydroxybenzilideneamino)propyl]-piperazine) as catalysts for photocatalytic degradation of Acid Orange 7 and Methyl Orange dyes from single and binary aqueous solutions. The influence of the photocatalyst nature, hydrogen peroxide presence, reaction time, dye concentration, and catalyst dose on the photodegradation efficiency was studied. Under visible light irradiation, complex demonstrated the highest photodegradation efficiency of 92.40% and 80.50% towards Acid Orange 7 and Methyl Orange, respectively. The kinetic studies indicated that the photodegradation process followed a pseudo-first-order kinetics. The highest rate of the degradation process was obtained when is used, and the necessary time for the degradation of the dyes increases with increasing concentration of the dye solutions. The degradation efficiency of more than 75% after five recycling/reuse cycles of and the yields higher than 72% obtained for the degradation of dyes from the binary system demonstrate the photocatalytic capacity of . A photocatalytic oxidation mechanism was proposed and the stability of the complex before and after the photodegradation process of dyes, both from simple and binary solutions, was investigated and confirmed.
本研究报道了三种铜（II）配位聚合物，即[CuL(N)]CHCOO（）、[CuL(NO)]NO·2CHOH·2HO（）和CuL(HO)（），其中代表N,N'-双[(2-羟基苯亚甲基氨基)丙基]-哌嗪，作为光催化剂用于从单一和二元水溶液中光催化降解酸性橙7和甲基橙染料。研究了光催化剂性质、过氧化氢的存在、反应时间、染料浓度和催化剂用量对光降解效率的影响。在可见光照射下，配合物对酸性橙7和甲基橙的光降解效率分别达到92.40%和80.50%，为最高。动力学研究表明，光降解过程遵循准一级动力学。使用时降解过程速率最高，染料降解所需时间随染料溶液浓度增加而增加。和经过五次循环/再利用后降解效率超过75%，从二元体系中降解染料的产率高于72%，证明了其光催化能力。提出了光催化氧化机理，并研究和证实了染料在单一和二元溶液中光降解前后配合物的稳定性。
