In this work hybrids of citric acid doped polyaniline and magnetic iron oxide (MOM) were prepared by in situ chemical polymerization and evaluated in blue methylene dye (MB) adsorption/photodegradation in aqueous medium. The samples were characterized by vibration absorption spectroscopy in the infrared region, X-ray diffraction, thermogravimetric analysis, transmission electron microscopy, Mössbauer spectroscopy, vibration sample magnetometry and electrical conductivity measurements using the four-point method. The characterization results showed that magnetic iron oxide consists of magnetite and maghemite phases with superparamagnetic behavior at room temperature. The hybrids materials present magnetic iron oxide particles dispersed in the polymer phase and electrical conductivity of the order of 10⁻²S cm⁻¹ and showed adsorbent properties. The adsorption process prevails in relation to the photodegradation, but in the hybrids with higher content of MOM an increase in MB removal was observed under UV irradiation, with reduction of 99% of the dye concentration, indicating synergism between the MOM -polymer phases in the photocatalytic action. These results are related to the hybrids morphology.

在这项工作中，通过原位化学聚合反应制备了柠檬酸掺杂的聚苯胺和磁性氧化铁（MOM）的杂化物，并评估了在水性介质中蓝色亚甲基染料（MB）的吸附/光降解作用。样品的特征在于红外区的振动吸收光谱，X射线衍射，热重分析，透射电子显微镜，穆斯堡尔光谱，振动样品磁强法和使用四点法的电导率测量。表征结果表明，磁性氧化铁由磁铁矿和磁铁矿相组成，在室温下具有超顺磁性。杂化材料的磁性氧化铁颗粒分散在聚合物相中，电导率约为10^-2 S cm ^-1并显示出吸附性能。吸附过程主要与光降解有关，但是在MOM含量较高的杂化物中，在UV照射下观察到MB去除量增加，染料浓度降低了99％，表明MOM聚合物相之间的协同作用。光催化作用。这些结果与杂种的形态有关。