胶束溶液中四(4-N-乙基吡啶基)卟啉铁催化H_2O_2氧化降解2,4,6-三氯苯酚的动力学研究

Study on the Oxidative Degradation Kinetics of 2,4,6-Trichlorophenol with H_2O_2 Catalyzed by Tetra(4-N-ethylpyridyl) porphyrinoiron in Micellar Solution

合成了四(4-N-乙基吡啶基)卟啉铁[Fe(TEPyP)],并用紫外-可见分光光度法研究了Fe(TEPyP)分别与表面活性剂正月桂酸肌氨酸钠(LSS)、十六烷基三甲基溴化铵(CTAB)和聚氧乙烯(23)十二烷基醚(Brij35)形成的金属胶束催化H2O2氧化2,4,6-三氯苯酚(TCP)反应的动力学,探讨了体系酸度、H2O2与催化剂的摩尔比以及温度对催化降解反应速率的影响,提出了催化氧化机理,建立了反应的动力学数学模型。结果表明,Fe(TEPyP)和胶束形成的金属胶束表现出过氧化物酶的催化氧化特性,其中阴离子表面活性剂LSS形成的金属胶束的催化作用最显著。

The oxidative degradation kinetics of 2,4,6-trichlorophenol （TCP） with H2O2 catalyzed by three kinds of metallomieelles, which formed by the reactions between synthesized Fe （TEPyP） with sodium N- lauroylsareosine （ LSS）, hexadeeyhrimethylammonium bromide （ CTAB ）, and polyoxyethylene （ 23 ） dodeeanol （Brij35） respectively, were studied by means of UV-Vis spectroscopy at 25℃. The effects of acidity of the reaction system, molar ratio of H2 O2/Fe（TEPyP） , and temperature on the catalytic oxidative reaction were investigated. The mechanism of the reaction was proposed and the kinetic model was established. The results indicated that the metallomieelles show the characteristic of peroxidase-eatalyzed oxidative and the catalysis activity of metallomieelle formed by Fe（TEPyP） and LSS is most significant.