Chandra Devsharma Sushen, Rahman Md Lutfor, Hossain Md Jakir, Biswas Bristy, Ahmed Md Farid, Sharmin Nahid
Institute of Glass and Ceramic Research and Testing (IGCRT), Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhanmondi, Dhaka-1205, Bangladesh.
Department of Chemistry, Begum Rokeya University, Rangpur, Bangladesh.
Heliyon. 2024 Jun 25;10(13):e33578. doi: 10.1016/j.heliyon.2024.e33578. eCollection 2024 Jul 15.
Copper doped magnesium ferrite, Mg-CuFeO(x = 0.0-1.0) nanomaterials were synthesized via. sol-gel method sintered at 600 for 2 h. The synthesized materials were characterized using modern sophisticated techniques viz. X-ray diffraction (XRD), Scanning electron microscopy (SEM), Transmission electron microscopy, Energy dispersive x-ray spectroscopy (EDS), Vibrating sample magnetometer, UV-visible diffuse reflectance spectra and Impedance analyzer. XRD analysis revealed that all the samples were single phase cubic spinel structure with Fd3m space group and investigated the change in structural parameters with copper concentration. The average crystallite size in the range of 11-23 nm and lattice parameters decrease with increasing Cu doping, due to the cationic distribution and ionic radius. The SEM images show the agglomeration of the particles with spherical like shape and elemental percentage were obtained from EDX. The saturation magnetization showed an increasing trend with increasing Cu concentration at a certain level and then decreases due to the rearrangement of cations at tetrahedral and octahedral sites. The Coercivity, Retentivity and magnetic crystalline anisotropy increase with changing dopant concentration. The magnetic measurements showed enhanced saturation magnetization at certain level (28.96emu/gm) and increase in coercivity up to 1102 Oe with changing dopant concentration. The estimated band gap energy is found to increase with Cu content. The dielectric constant, dielectric loss and impedance show normal behavior of ferrite. The frequency dependent dielectric constant decrease and tan delta shows a relaxation behavior at low frequencies. The synthesized nano Mg-Cu nanoparticles will be applied as humidity sensor, gas sensor, microwave devices and photocatalyst.
通过溶胶 - 凝胶法合成了铜掺杂的镁铁氧体Mg - CuFeO（x = 0.0 - 1.0）纳米材料，并在600℃烧结2小时。使用现代精密技术对合成材料进行了表征，即X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜、能量色散X射线光谱（EDS）、振动样品磁强计、紫外 - 可见漫反射光谱和阻抗分析仪。XRD分析表明，所有样品均为具有Fd3m空间群的单相立方尖晶石结构，并研究了结构参数随铜浓度的变化。由于阳离子分布和离子半径，平均晶粒尺寸在11 - 23nm范围内，晶格参数随铜掺杂量的增加而减小。SEM图像显示了颗粒的团聚，呈球形，通过EDX获得了元素百分比。饱和磁化强度在一定水平上随铜浓度的增加呈上升趋势，然后由于四面体和八面体位置阳离子的重新排列而下降。矫顽力、剩磁和磁晶各向异性随掺杂剂浓度的变化而增加。磁性测量表明，在一定水平（28.96emu/gm）下饱和磁化强度增强，矫顽力随掺杂剂浓度的变化增加至1102 Oe。发现估计的带隙能量随铜含量增加。介电常数、介电损耗和阻抗显示出铁氧体的正常行为。频率依赖性介电常数降低，tanδ在低频下表现出弛豫行为。合成的纳米Mg - Cu纳米颗粒将用作湿度传感器、气体传感器、微波器件和光催化剂。
