A novel catalytic nanocomposite, MNPs/Hal‐POSS‐HEMA‐Pd, composed of halloysite nanoclay and polyhedral oligomeric silsesquioxane is reported. To synthesize the catalyst, magnetic halloysite was vinyl functionalized and then polymerized with 2‐hydroxyethyl methacrylate and methacrylate polyhedral oligomeric silsesquioxane. Afterwards, the latter was palladated to furnish a heterogeneous catalyst with use for catalyzing the reductive degradation of organic dyes, Rhodamine B, and methyl orange with NaBH₄. The kinetic and thermodynamic parameters of both reactions were estimated. The results asserted that low content of the catalyst could catalyze the dye reduction reactions to furnish hydrogenated product in quantitative conversion in a very short reaction times (1 min). It is assumed that both halloysite and polyhedral oligomeric silsesquioxane can contribute to the anchoring of Pd nanoparticles. On the other hand, the polymeric network around halloysite can furnish a microenvironment for bringing dyes in the vicinity of active sites. Moreover, unique tubular morphology of halloysite can effectively improve dye adsorption and consequently enhance dye reduction. Additionally, the study of the recyclability of the catalyst approved that it could be magnetically recovered and reused for ten successive reaction runs with trivial leach of Pd (2 wt.%) and decrement of the catalytic activity.

中文翻译：

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埃洛石和含POSS共聚物的磁性杂化物中的钯：一种有效的染料还原催化剂

据报道，由埃洛石纳米粘土和多面体低聚倍半硅氧烷组成的新型催化纳米复合材料，MNPs / Hal-POSS-HEMA-Pd。为了合成催化剂，对磁性埃洛石进行了乙烯基官能化处理，然后与甲基丙烯酸2-羟乙酯和甲基丙烯酸多面体低聚倍半硅氧烷进行聚合。此后，将后者制成钯色，以提供一种多相催化剂，用于催化NaBH ₄对有机染料，若丹明B和甲基橙的还原降解。。估算了两个反应的动力学和热力学参数。结果表明，低含量的催化剂可以在很短的反应时间（1分钟）内催化染料还原反应，以定量转化提供氢化产物。假定埃洛石和多面体低聚倍半硅氧烷都可以促进Pd纳米颗粒的锚固。另一方面，埃洛石周围的聚合物网络可为将染料带入活性位点附近提供微环境。此外，埃洛石独特的管状形态可以有效地改善染料的吸附，从而增强染料的还原。此外，对催化剂可回收性的研究证实，可以用少量的Pd（2 wt。