摘要

欧洲材料2021:从鸢尾草提取物合成的Fe-Cu双金属纳米颗粒的自由基清除和催化活性:Syed Taimoor Hassan -化学系，拉合尔大学。巴基斯坦

作者(年代):赛义德·泰穆尔·哈桑

采用绿色合成工艺制备了铁铜双金属纳米粒子(Fe-Cu BNPs)。在Fe-Cu bbnps的改性过程中，本研究使用了鸢尾草(Ixora finlaysoniana)作为覆盖剂和稳定剂。采用UV/Vis分光光度法、FTIR、XRD和SEM等技术对合成后的BNPs进行了表征。粒度分析仪和扫描电镜研究表明，粒度在50-200 nm范围内。此外，还使用BNPs检测了MB染料在水体系中的降解和DPPH实验中的自由基清除潜力。采用紫外/可见分光光度法对亚甲基蓝染料在17 min内的降解情况进行了监测，结果表明Fe-Cu BNPs对亚甲基蓝染料的降解效率较高。双金属纳米颗粒还被发现能有效中和DPPH自由基。此外，本文还报道了染料降解和自由基清除的动力学研究。随后，通过绿色可持续的方法合成的Fe-Cu BNPs可用于染料降解和自由基清除活性。结果:本研究工作的目的是用绿色方法合成Fe-Cu双金属纳米颗粒(BNPs)。 Ixora finlaysoniana, an East Asian medicinal plant, was used as a source of biomolecules to synthesize BNPs. The confirmation for the synthesis of nanoparticles was carried out with a UV spectrophotometer. Their size range was checked by a size distribution analyzer which confirmed the presence of metal nanoparticles in the nanosized range. In addition, FTIR analysis, XRD and SEM studies confirmed the formation and structure of BNPs. The antioxidant potential in terms of radical-scavenging potential was determined by employing a DPPH assay and synthesized metal nanoparticles exhibited good antioxidant properties. The catalytic activity was determined using methylene blue dye as a substrate and sodium borohydride as a reducing agent. Conclusion & Significance: Results revealed that BNPs can effectively degrade the dye present in a water medium. Kinetic studies confirmed pseudo-first order reactions for both the radical-scavenging and catalytic activity. All the results of characterization and different studies proved that Fe-Cu BNPs can be successfully fabricated using Ixora finlaysoniana extract. Furthermore, these BNPs can be employed for radical scavenging and catalytic activities. Therefore, these Fe-Cu BNPs could attain much importance because they can meet the increasing demand for efficient and active nanoparticles in a sustainable, economical and ecofriendly way.