Magnetic, electrical, and dielectric properties of microwave-assisted synthesis of Bi0.6Sr0.4 FeO3 nanoparticles for wastewater treatments: Electro-degradation of Rhodamine B dye
Mohamed Abdel-Megid , Mohamed E. Eissa , Ahmed T. Mosleh , Nourhan A.M. Ragab , Heba Y. Zahran , Ibrahim S. Yahia , Elbadawy A. Kamoun , M.H. Ghozza
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引用次数: 0
Abstract
Bi0.6Sr0.4FeO3 (BSF) ceramics was synthesized using various methods to compare their surface morphology, dielectric, and magnetic characteristics. For 0, 5, 10, 15, and 20 min, the mixed aqueous solutions were subjected to 700 W of microwave radiation, as coded (BSF0, BSF5, BSF10, BSF15 and BSF20). SEM findings demonstrated that the duration of microwave radiation exposure impacted significantlly the size and shape of produced nanostructures. Additionally, it was observed that when the microwave duration increased, the average particle size of nanostructures dropped. BSF samples showed a transition from tetragonal to cubic with microwave assist duration time. Notably, a significant portion of substantial dielectric constant (103–104) at lower frequencies is caused by heterogeneous electronic microstructure at grain contacts. The mechanically alloyed materials exhibited a much-decreased grain boundary resistivity, compared to solid-state and chemically-routed samples. σDc as a function of temperature depicts the transition point which was observed near 340 K and shifted to low-temperature exposure time increases. σDc also falled to 50 % of its value with the influence of microwave time, while Ea (0.09–0.37 eV) increased, except BSF10 sample. σAC increased with increasing frequency, but the effect of microwave time on σAC is still insignificant, where ε′ falled to 50 % of its value with 20 min. Magnetization and coercivity affected significantly by microwave time, where corecivity increaseed 150 %, and magnetization increased 400 % with exposure to microwave for BSF20. Signatures of strong ferromagnetism at room temperature were observed in some of samples. Bi0.6Sr0.4FeO3, a bismuth perovskite, is a good option for data storage applications, because of its strong coercivity and saturation magnetization. Electrocatalytic tests demonstrated that BSF10 perovskite exhibited the highest activity, achieving 98.18 %, while BSF0 achieved 54.04 % of rhodamine B dye (RhB) degradation within 90 s, trapping investigations revealed that the main species causing the deterioration was O2●−.
期刊介绍:
Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties.
Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour.
Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.