Enhancing the Supercapacitive and Superparamagnetic Performances of Iron Oxide Nanoparticles through Yttrium Cations Electro-chemical Doping

Abstract

A one-pot electrosynthesis platform is reported for fabrication of Y 3+ doped iron oxide nanoparticles (Y-IONPs). In this procedure, Y-IONPs are electro-deposited from an additive-free aqueous solution of iron(III) nitrate, iron(II) chloride and yttrium chloride. The analysis data provided by X-ray diffraction (XRD), field emission electron microscopy (FE-SEM) and energy-dispersive X-ray (EDX) confirmed that the deposited Y-IONPs sample is composed of magnetite nanoparticles (size≈20nm) doped with about 10wt% Y 3+ cations. The performance of the prepared Y-IONPs as supercapacitor electrode material was studied using cyclic voltammetry (CV) and galvanostat charge-discharge (GCD) tests. The obtained electrochemical data showed that Y-IONPs provide SCs as high as 190.3 and 138.9 F g −1 at the discharge loads of 0.25 and 1 A g −1 , respectively, and capacity retentions of 95.9% and 88.5% after 2000 GCD cycling. Furthermore, the results of vibrating sample magnetometer measurements confirmed better superparamagnetic behavior of Y-IONPs (Mr=0.32 emu g-1 and H Ci = 6.31 G) as compared with pure IONPs (Mr=0.95 emu g-1 and H Ci = 14.62 G) resulting from their lower Mr and Hci values. Based on the obtained results, the developed electro-synthesis method was introduced as a facile procedure for the preparation of high performance metal ion doped magnetite nanoparticles.

Thermal and mechanical properties of epoxy resin reinforced with modified iron oxide nanoparticles

“…To study the effect of the functionalization process on the crystal structure of Fe 3 O 4 nanoparticles, XRD analysis was performed on the powders, the results were displayed in Figure 5(b). The diffractogram of pristine Fe 3 O 4 NPs shows characteristic peaks at 18.24 o , 30.18 o , 35.54 o , 43.17 o , 57.08 o , 62.67 o corresponding to (220), (311), (400), (511), and (440), respectively, indicating a cubic crystal system belonging to Fd3m (227) space group (COD ID 9005839 46 ) in accordance with the literature 45,47–49 . The XRD pattern for the modified NPs showed the same peaks as with pristine Fe 3 O 4 suggesting that there was no significant change in the materials crystal structure once modified.…”

“…45 To study the effect of the functionalization process on the crystal structure of Fe 3 O 4 nanoparticles, XRD analysis was performed on the powders, the results were displayed in Figure 5 46 ) in accordance with the literature. 45,[47][48][49] The XRD pattern for the modified NPs showed the same peaks as with pristine Fe 3 O 4 suggesting that there was no significant change in the materials crystal structure once modified. The peak intensities for Fe 3 O 4 /GPTMS and Fe 3 O 4 /APTES were slightly less than that of Fe 3 O 4 with slight shifts in the peak locations suggesting possible surface modification but a stable crystal structure.…”

Rare‐Earth Doped Iron Oxide Nanostructures for Cancer Theranostics: Magnetic Hyperthermia and Magnetic Resonance Imaging

“…Similar observations have been reported in several such doped magnetite studies involving other RE ions. [70,71,77,79,80,82,85,100,105] However, due to the relatively large radius, the d-spacing could be expanded by doping. One such example is Y 3+ doping in Fe 3 O 4 , as shown in Figure 3B.…”

“…Studies involving the modification of lattice parameters and crystallite size have been extensively reported for other RE doped iron oxide nanoparticle systems. [31,70,85] It has been observed that for doping with most of the major RE ions, namely Y 3+ , La 3+ , Dy 3+ , Eu 3+ , Nd 3+ , Sm 3+ , Tb 3+ , [31,70,71,77,84,85,94,99,100] a substantial increase in the particle size has been recorded, excepting a few cases. [76,79,105] For example, for Ce doped Fe 3 O 4 , we have categorically observed a decrease in the particle size after doping (Table 5), [76,79] an observation contrary to those reported with Gd and other major RE doped magnetite particles.…”

Development and Characterization of PbI2 Nanoparticles for all Solid-State Flexible Supercapacitor Purposes

“…Metal oxide nanoparticles (NPs) can be excellent modifiers in doping of materials in the development of hybrid supercapacitors 16,17 . Lead iodide NPs (PbI 2 -NPs) have been extensively developed due to their potential technological applications in active matrix flat panel imagers (AMFPI), room temperature ionizing radiation detectors, photo-detectors and photovoltaic cells.…”