Tabassum Nazifa, Saha Shimul, Islam Md Mominul, Susan Md Abu Bin Hasan
Department of Chemistry, University of Dhaka, Dhaka 1000, Bangladesh.
Department of Chemistry, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh.
R Soc Open Sci. 2024 May 15;11(5):230632. doi: 10.1098/rsos.230632. eCollection 2024 May.
Electrodeposition of iron (Fe) was investigated in three different media, namely a hydrophilic ionic liquid (IL), 1-ethyl-3-methylimidazolium trifluoromethanesulfonate, conventional reverse microemulsion (RME)/reverse micellar solution, and IL-based RME of a non-ionic surfactant, Triton X-100, with a view to electrodepositing iron with desired morphology. Electrochemical behaviour of Fe was studied using cyclic voltammetric technique with a copper electrode as the working electrode. Electrochemical reduction of Fe in all the studied media was found to be an electrochemically irreversible, diffusion-controlled process. Successful potentiostatic electrodeposition of metallic iron was performed in all the studied media on copper substrate using bulk electrolysis method. The obtained iron electrodeposits were characterized using a scanning electron microscope and an X-ray diffractometer. The controlled diffusion of Fe towards electrode surface in all the media resulted in the formation of nanoparticles of iron, but compact layers of granular nanoparticles could be achieved from both the conventional and IL-based RME systems. The IL-based microemulsions synergistically combined the advantageous features of both the IL and RME and showed promise for tuning the size, shape, and morphology of the electrodeposited iron.
研究了在三种不同介质中电沉积铁（Fe）的情况，这三种介质分别是亲水性离子液体（IL）1-乙基-3-甲基咪唑三氟甲磺酸盐、传统反相微乳液（RME）/反胶束溶液以及基于离子液体的非离子表面活性剂吐温X-100的反相微乳液，目的是电沉积出具有所需形态的铁。以铜电极作为工作电极，采用循环伏安法研究了铁的电化学行为。发现在所有研究介质中铁的电化学还原是一个电化学不可逆的、扩散控制的过程。使用本体电解法在所有研究介质中的铜基底上成功进行了金属铁的恒电位电沉积。使用扫描电子显微镜和X射线衍射仪对所得的铁沉积物进行了表征。在所有介质中铁向电极表面的受控扩散导致形成了铁纳米颗粒，但从传统的和基于离子液体的反相微乳液体系中都可以获得致密的颗粒状纳米颗粒层。基于离子液体的微乳液协同结合了离子液体和反相微乳液的有利特性，并显示出在调节电沉积铁的尺寸、形状和形态方面的潜力。
