微波辅助合成用于废水处理的Bi0.6Sr0.4 FeO3纳米粒子的磁、电和介电性质:罗丹明B染料的电降解

IF 5.6 2区 材料科学 Q1 MATERIALS SCIENCE, CERAMICS
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

摘要

采用多种方法合成Bi0.6Sr0.4FeO3 (BSF)陶瓷,比较其表面形貌、介电特性和磁性。在0、5、10、15和20分钟内,对混合水溶液进行700 W的微波辐射,编码为(BSF0、BSF5、BSF10、BSF15和BSF20)。扫描电镜结果表明,微波辐照时间对纳米结构的大小和形状有显著影响。此外,随着微波时间的增加,纳米结构的平均粒径减小。随着微波辅助时间的延长,BSF样品呈现出由四方向立方的转变。值得注意的是,在较低频率下,大量介电常数(103-104)的很大一部分是由晶粒接触处的非均匀电子微观结构引起的。与固态和化学路线样品相比,机械合金化材料的晶界电阻率大大降低。σDc随温度的变化描述了在340 K附近观察到的转变点,并随着暴露时间的增加而向低温转移。除BSF10样品外,σDc随微波时间的影响也下降到其值的50%,Ea (0.09 ~ 0.37 eV)升高。σAC随频率的增加而增大,但微波时间对σAC的影响不显著,20 min后ε值下降到原来的50%。微波时间对BSF20的磁化强度和矫顽力有显著影响,其中磁化强度随微波时间的增加而增加150%,磁化强度随微波时间的增加而增加400%。部分样品在室温下表现出强铁磁性。Bi0.6Sr0.4FeO3是一种铋钙钛矿,由于其强矫顽力和饱和磁化,是数据存储应用的一个很好的选择。电催化实验表明,BSF10钙钛矿在90 s内对罗丹明B染料(RhB)的降解率最高,达到98.18%,而BSF0在90 s内对RhB染料的降解率为54.04%,捕集研究表明,引起降解的主要物质是O2●−。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Magnetic, electrical, and dielectric properties of microwave-assisted synthesis of Bi0.6Sr0.4 FeO3 nanoparticles for wastewater treatments: Electro-degradation of Rhodamine B dye
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●−.
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来源期刊
Ceramics International
Ceramics International 工程技术-材料科学:硅酸盐
CiteScore
9.40
自引率
15.40%
发文量
4558
审稿时长
25 days
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.
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