Worldwide, pharmaceutical and personal care products are increasingly being used and produced and their presence in various water bodies has attracted significant attention amongst the public and scientists. Classified as emerging pollutants, these pharmaceutical and personal care products ultimately accumulate in and contaminate natural water bodies through several pathways. In this study, a photocatalytic membrane consisting of bismuth vanadate nanoparticles and hyperbranched polyethyleneimine, blended in polyethersulphone, was used in the degradation of triclosan. Bismuth vanadate was characterised using X-ray diffraction and Raman spectroscopy. These analyses revealed that there was successful synthesis of the monoclinic phase of bismuth vanadate, as well as a monoclinic-to-tetragonal (M → T) phase transformation upon the addition of hyperbranched polyethyleneimine to the nanoparticles. The modified membranes showed improved water flux and hydrophilicity (contact angles of between 71° and 56°) as compared to that of the bare polyethersulphone (75°) upon the addition of hyperbranched polyethylene amine and bismuth vanadate. The modified membranes were effective in the photodegradation of triclosan (up to 86%), and the generation of chloride ions was observed.

中文翻译：

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高效光催化超支化聚乙烯亚胺/钒酸铋膜降解三氯生

在世界范围内，药品和个人护理产品的使用和生产越来越多，它们在各种水域中的存在引起了公众和科学家的极大关注。这些药品和个人护理产品被归类为新兴污染物，最终通过多种途径积聚并污染了天然水体。在这项研究中，由钒酸铋纳米粒子和超支化聚乙烯亚胺组成的光催化膜与聚醚砜混合，用于降解三氯生。钒酸铋使用X射线衍射和拉曼光谱进行表征。这些分析表明，成功合成了钒酸铋的单斜晶相，以及在纳米粒子中添加超支化聚乙烯亚胺后的单斜向四方相（M→T）相变。与添加超支化聚乙烯胺和钒酸铋相比，裸露的聚醚砜（75°）相比，改性膜显示出更高的水通量和亲水性（接触角介于71°和56°之间）。改性的膜对三氯生的光降解有效（高达86％），并且观察到氯离子的产生。