Microstructural and electrochemical evaluations of Ti-substituted LaFe₀.₈Cu₀.₂₋ₓTiₓO nanostructures with nascent vacancies

Journal of Alloys and Compounds, Год журнала: 2025, Номер 1020, С. 179420 - 179420

Опубликована: Фев. 27, 2025

Язык: Английский

Psidium guajava mediated green synthesized cobalt oxide nanoparticles dispersed on reduced graphene oxide for electrocatalytic water splitting

RSC Advances, Год журнала: 2025, Номер 15(18), С. 13786 - 13798

Опубликована: Янв. 1, 2025

In this research, we synthesized (Co3O4)aq and (Co3O4)et nanoparticles (NPs) utilizing aqueous ethanolic extracts, respectively, of Psidium guajava leaves. The biosynthesized NPs were sonicated with reduced graphene oxide (rGO) to produce rGO@(CO3O4)aq rGO@(Co3O4)et nanocomposites (NCs) their respective calcined (700 °C) products rGO@(CO3O4)aqc rGO@(Co3O4)etc. nanomaterials (NMs) characterized through XRD, FTIR, UV-visible spectroscopy, SEM, TGA, DSC analyses. They exhibited crystallite sizes 10-15.4 nm band gaps 5.1-5.9 mV. Their surfaces coated organic moieties from plant extracts. TGA analyses showed the endothermic loss moisture exothermic evolution contents. SEM images revealed rough porous NPs, making them efficient catalysts for water splitting. Linear swap voltammetry (LSV) measurements oxygen reaction (OER) hydrogen (HER), Tafel slopes double layer capacitance (C dl) values reflected a decrease in electrocatalytic splitting efficiency following order: rGO@(Co3O4)aq > rGO@(Co3O4)aqc Each extract-derived nanomaterial was electrocatalytically more active than its counterpart. Moreover, non-calcined rGO decorated Co3O4 superior performance compared counterparts therefore, can be recommended as best choices applications.

Язык: Английский

Hydrothermal engineering of polyethylene glycol-assisted boron nitride/hematite nanohybrid composites for high-performance supercapacitors

RSC Advances, Год журнала: 2025, Номер 15(20), С. 16035 - 16049

Опубликована: Янв. 1, 2025

PEG-assisted BN/α-Fe 2 O 3 hybrid composites were synthesized via hydrothermal method. PEG enhanced thier thermal and electrochemical propoerties, achieving 361.6 F g −1 capacitance 85% retention after 5000 cycles, ideal for supercapacitors.

Язык: Английский