This work introduces a novel strategy for embedding palladium nanoparticles (PdNPs) within a polythiosemicarbazide (PTSC) polymeric membrane, achieving non-agglomerated, uniformly dispersed nanoparticles. The PTSC’s unique architecture, featuring a single chelation site per monomer, ensures an abundance of absorption sites, enabling the reduction of metal ions into well-dispersed PdNPs with an average size of 2.3 nm. This approach maximizes the nanoparticle loading capacity while maintaining consistent distribution throughout the membrane matrix. The resulting PdNP-embedded membrane exhibits exceptional catalytic activity, effectively facilitating the reduction of 4-nitrophenol to 4-aminophenol and the degradation of methyl orange dye. Dynamic catalytic processes significantly outperform batch methods, achieving an 80 % conversion of 4-NP to 4-AP seven times faster, and a 70 % degradation of MO in just 20 min, demonstrating an 18-fold efficiency improvement. With only a 1 % PdNPs loading, this system effectively overcomes diffusion limitations, underscoring its potential for scalable applications in environmental catalysis and advanced water treatment technologies. This study not only demonstrates the efficacy of PTSC membranes in catalytic applications but also highlights the broader potential for incorporating uniformly dispersed nanoparticles in polymer matrices for enhanced performance in various chemical engineering processes.

中文翻译：

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在聚硫代氨基脲膜中均匀生长均匀的钯纳米颗粒，以增强催化还原和染料降解


这项工作介绍了一种将钯纳米颗粒 （PdNPs） 嵌入聚硫代氨基脲 （PTSC） 聚合物膜内的新策略，从而获得非团聚、均匀分散的纳米颗粒。PTSC 的独特结构，每个单体只有一个螯合位点，可确保丰富的吸收位点，从而能够将金属离子还原成平均尺寸为 2.3 nm 的分散良好的 PdNP。这种方法最大限度地提高了纳米颗粒负载能力，同时保持了整个膜基质的一致分布。所得的 PdNP 包埋膜表现出优异的催化活性，有效促进 4-硝基苯酚还原为 4-氨基苯酚和甲基橙染料的降解。动态催化工艺的性能明显优于间歇方法，在短短 20 分钟内将 4-NP 转化为 4-AP 的速度提高了 7 倍，将 MO 降解速度提高了 70%，效率提高了 18 倍。该系统仅用 1% 的 PdNPs 负载量，有效地克服了扩散限制，突显了其在环境催化和先进水处理技术中可扩展应用的潜力。这项研究不仅证明了 PTSC 膜在催化应用中的功效，还强调了在聚合物基质中掺入均匀分散的纳米颗粒以增强各种化学工程过程性能的更广泛潜力。