Faculty of Chemistry, Jagiellonian University in Kraków, Gronostajowa 2 street, 30-387 Kraków, Poland.
Faculty of Chemistry, Jagiellonian University in Kraków, Gronostajowa 2 street, 30-387 Kraków, Poland.
Int J Biol Macromol. 2022 Jul 31;213:738-750. doi: 10.1016/j.ijbiomac.2022.06.020. Epub 2022 Jun 8.
In this work, platinum nanoparticles (PtNPs) were synthesized by a modified polyol process using TEMPO-oxidized nanocellulose (TOCN) as a stabilizing and co-reducing agent. Different ratios of TOCN nanocellulose to Pt ions were studied to establish the optimum stabilizing effect of PtNPs. The effect of different pH of aqueous TOCN suspensions on the morphology of PtNPs was also examined. It was proved that PtNPs can be obtained solely in the presence of TOCN without the use of an additional reducing agent or ethylene glycol. The morphology and structural properties of the nanocellulose‑platinum nanoparticles composites were assessed using spectroscopic, microscopic and diffraction techniques, The catalytic performance in 4-nitrophenol reduction was evaluated. Significant differences in reaction rate constants k were found depending on the pH of the TOCN suspension applied during Pt reduction. The crucial effect of reaction conditions on PtNPs performance was confirmed in tests of antibacterial efficacy against E. coli.
在这项工作中，使用 TEMPO 氧化纳米纤维素（TOCN）作为稳定和共还原剂，通过改进的多元醇法合成了铂纳米粒子（PtNPs）。研究了 TOCN 纳米纤维素与 Pt 离子的不同比例，以确定 PtNPs 的最佳稳定效果。还研究了不同 pH 值的 TOCN 水悬浮液对 PtNPs 形态的影响。结果证明，无需额外的还原剂或乙二醇，仅在存在 TOCN 的情况下即可获得 PtNPs。使用光谱、显微镜和衍射技术评估了纳米纤维素-铂纳米粒子复合材料的形态和结构特性，并评估了在 4-硝基苯酚还原中的催化性能。根据在 Pt 还原过程中使用的 TOCN 悬浮液的 pH 值，发现反应速率常数 k 存在显著差异。在针对大肠杆菌的抗菌功效测试中，证实了反应条件对 PtNPs 性能的关键影响。
