Abstract
A one-pot electrosynthesis platform is reported for fabrication of Y3+ 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% Y3+ 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 HCi= 6.31 G) as compared with pure IONPs (Mr=0.95 emu g-1 and HCi= 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.
Highlights
Supercapacitors (SCs) have received great attentions among various energy storage devices both in academic and practical applications
The cathodic electrosynthesis (CE) platform previously reported for the fabrication of naked and coated magnetite nanoparticles (MNPs), 51,53 was here modified for the electrosynthesis of Y3+ doped IONPs
The following mechanism could be written for the formation of Y3+ doped iron oxide nanoparticles (Y-IONPs) : 51,52
Summary
Supercapacitors (SCs) have received great attentions among various energy storage devices both in academic and practical applications. Reviewing the results of these works indicates that performance of iron oxide electrode is improved due to enhancing its conductivity and redox activity. We report a novel platform for the preparation of metal ion (Y3+) doped iron oxide nanoparticles (Y-IONPs) through cathodic electrodeposition procedure, and about 15% improvement in the supercapacitive capability of IONPs as a result of Y3+ doping. This platform is based on the well-known cathodic electrosynthesis (CE) method. It is worth noting that we very recently reported one-pot electrosynthesis
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