Nicoleta Bogatu, Lidia Benea, Daniela-Laura Buruiană, Vasile Bașliu, Jean-Pierre Celis
Faculty of Engineering, Dunarea de Jos University of Galati, 47 Domnească Street, 800008 Galati, RO, Romania.
Competences Center, Interfaces-Tribocorrosion-Electrochemical Systems, Dunarea de Jos University of Galati, 47 Domnească Street, 800008 Galati, RO, Romania.
Nanomaterials (Basel). 2022 Aug 25;12(17):2923. doi: 10.3390/nano12172923.
The electrodeposition method was used to obtain nanostructured layers of Co/nano-CeO on 304L stainless steel, from a cobalt electrolyte in which different concentrations of CeO nanoparticles (0, 10, 20, and 30 g/L) were dispersed. The electrodeposition was performed at room temperature using three current densities (23, 48, and 72 mA cm), and the time was kept constant at 90 min. The influence of current densities and nanoparticle concentrations on the characteristics of the obtained nanostructured layers is also discussed. An X-ray diffractometer (XRD) was used to investigate the phase structure and cobalt crystallite size of the nanostructured layers, and a contact angle (sessile drop method) was used to assess the wettability of the electrodeposited layers. The roughness of the surfaces was also studied. The results show that the nanostructured layers became more hydrophilic with increasing nanoparticle concentration and increasing current density. In the case of pure cobalt deposits, an increase in the current density led to an increase in the size of the cobalt crystallites in the electrodeposited layer, while for the Co/nano-CeO nanostructured layers, the size of the crystallites decreased with increasing current density. This confirms the nanostructuring effect of nano-CeO electrocodeposited with cobalt.
采用电沉积法在304L不锈钢上制备Co/纳米CeO纳米结构层，电解液为钴电解液，其中分散有不同浓度的CeO纳米颗粒（0、10、20和30 g/L）。电沉积在室温下进行，使用三种电流密度（23、48和72 mA/cm²），时间保持恒定为90分钟。还讨论了电流密度和纳米颗粒浓度对所得纳米结构层特性的影响。使用X射线衍射仪（XRD）研究纳米结构层的相结构和钴微晶尺寸，并使用接触角（座滴法）评估电沉积层的润湿性。还研究了表面粗糙度。结果表明，随着纳米颗粒浓度和电流密度的增加，纳米结构层变得更亲水。在纯钴沉积物的情况下，电流密度的增加导致电沉积层中钴微晶尺寸的增加，而对于Co/纳米CeO纳米结构层，微晶尺寸随着电流密度的增加而减小。这证实了与钴共电沉积的纳米CeO的纳米结构化效应。
