Abstract：
This study presents an innovative and environmentally friendly method to produce fibrous cellulose beads by mechanically stirring natural fibers in an aqueous medium. Date palm fibers are transformed into uniform beads with a diameter of 1.5 to 2 mm through chemical treatment and mechanical agitation. These beads are then decorated with silver nanoparticles (Ag0 NPs) in a one-step synthesis, giving them catalytic capabilities for the reduction of 4-nitrophenol (4-NP) and antibacterial activities. Characterization techniques such as FTIR, XRD, SEM, EDX, and TGA confirmed the successful synthesis and deposition of Ag0 NPs on the cellulose beads. Tests showed complete conversion of 4-NP to 4-AP in just 7 min, with pseudo-first-order kinetics and a Kapp of 0.590 min-1. Additionally, Ag0@CB demonstrated exceptional recyclability and stability over five cycles, with minimal silver release. The beads also showed strong antibacterial activity against Escherichia coli and Staphylococcus aureus, effectively eradicating bacterial colonies in 30 min. In summary, Ag0@CB exhibits multifunctional capabilities for degrading organic pollutants and biomedical applications, offering promising potential for large-scale production and practical use in water treatment and antibacterial coatings.
摘要：
这项研究提出了一种创新的环保方法，通过在水性介质中机械搅拌天然纤维来生产纤维状纤维素珠。通过化学处理和机械搅拌将椰枣纤维转化为直径为1.5至2mm的均匀珠粒。然后在一步合成中用银纳米颗粒（Ag0NP）装饰这些珠子，使它们具有还原4-硝基苯酚（4-NP）和抗菌活性的催化能力。表征技术，如FTIR，XRD,SEM,EDX,和TGA证实了AgONP在纤维素珠上的成功合成和沉积。测试表明4-NP在短短7分钟内完全转化为4-AP，具有伪一级动力学，Kapp为0.590min-1。此外,Ag0@CB在五个循环中表现出卓越的可回收性和稳定性，以最小的银释放。这些珠子对大肠杆菌和金黄色葡萄球菌也显示出很强的抗菌活性，在30分钟内有效根除细菌菌落。总之,Ag0@CB具有降解有机污染物和生物医学应用的多功能能力，为大规模生产和在水处理和抗菌涂料中的实际使用提供了有希望的潜力。
