In this work Nexar^®-based nanocomposite membranes, consisting of tert-butyl styrene end blocks, hydrogenated isoprene inner blocks and a middle block that is selectively and randomly sulfonated, were prepared by dispersing bismuth oxide (Bi₂O₃) nanoparticles inside. The aim was to evaluate their adsorption properties and photocatalytic activity. The chemical, structural and morphological properties of the produced materials were characterized by scanning electron microscopy (SEM), x-ray photoemission spectroscopy (XPS) and thermogravimetric analysis (TGA). We found that a partial reduction of Bi₂O₃ to metallic Bi takes place during the nanocomposite preparation. The presence of the bismuth-based nanomaterials changes the light absorbance of the polymer affecting positively the dye removal ablity of the polymeric nanocomposite. The removal/degradation properties of the membranes were investigated by measuring the degradation of two dyes, methylene blue (MB) and methyl orange (MO), under UV/visible or blue light illumination. The UV–vis light irradiation increases the MB removal for both the membranes, due to an enhanced adsorption effect, while blue light irradiation induces a similar enhancement only for the filler-free membrane. For the nanocomposite membrane containing Bi₂O₃ (s-PBC-BO) we observe the highest efficiency in the removal of MO under blue light irradiation due to a combined effect of light absorption by both the nanocomposite and the dye.

在这项工作中的Nexar ^®系纳米复合材料薄膜，包括叔丁基苯乙烯末端嵌段，氢化异戊二烯内部块和中间块，其选择性和随机磺化，通过氧化铋（Bi分散制备₂ ö ₃）的纳米颗粒的内部。目的是评估它们的吸附性能和光催化活性。通过扫描电子显微镜（SEM），X射线光电子能谱（XPS）和热重分析（TGA）表征了所生产材料的化学，结构和形态特性。我们发现Bi ₂ O ₃的部分还原在纳米复合材料制备过程中，金属Bi的生成过程开始。铋基纳米材料的存在改变了聚合物的光吸收，从而积极地影响了聚合物纳米复合材料的染料去除能力。通过在紫外/可见光或蓝光照射下测量两种染料亚甲基蓝（MB）和甲基橙（MO）的降解，研究了膜的去除/降解特性。紫外线可见光照射增加了吸附效果，从而增加了两种膜的MB去除率，而蓝光照射仅对无填料的膜产生了类似的增强作用。对于含有Bi ₂ O ₃的纳米复合膜 （s-PBC-BO）我们观察到在蓝光照射下去除MO的效率最高，这是由于纳米复合材料和染料吸收光的综合作用。