ZnFe2−xLaxO4 nanostructure: synthesis, characterization, and its magnetic properties

Abstract

La 3? doped ZnFe 2 O 4 nanostructures were prepared by the two-step sol gel method in the presence of Zn(NO 3 ) 2 Á6H 2 O, Fe(NO 3 ) 3 Á9H 2 O, and La(NO 3 ) 3 in an aqueoussolution. Besides, the effect of different type of surfactants such as sodium dodecyl sulfate, cetrimonium bromide, polyvinyl alcohol, oleic acid, and polyvinylpyrrolidone on the morphology and particle size of final product was investigated. Furthermore, the effect of La 3? dope on the magnetic properties of ZnFe 2 O 4 nanostructures was investigated. VSM results demonstrated the dope concentration play an important role on the magnetic properties of final products. According to the XRD results, the lattice parameter decreases with added La 3? from 8.443 to 5.5203 Å , thus obeying Vegard's law. The products were characterized by XRD, SEM, EDX, VSM, TEM, UV-visible, and EDS.

Synthesis and characterization of gold nanoparticles with the aid of green reducing agent through the free surfactant microwave method

“…At 300 K the remanent is 100 Oe, and the magnetization at saturation (Ms) is estimated to be only 0.4 emu/g. In recent years, there has been considerable interest in control the shape and particle size of nanomaterials with the aid of the control reaction parameters; properties of nanomaterials are highly depend on their particle sizes and morphologies [35][36][37][38][39]; therefore, in this research, in order to examine the effect of the concentration of the glucose on the morphology and particle size of Au, three tests were performed at different glucose concentrations. SEM images of samples 1-3 prepared at 750 W for 4 min in the glucose concentrations 0.5, 1.0, and 1.5 g is shown in Fig.…”

Experimental Study of the Thermal Properties of Microencapsulated Palmitic Acid Composites with CuCO3 Shell as Thermal Energy Storage Materials

“…Energy and related issues, including the use of natural energies such as solar energy, and in particular energy storage systems, have become the priorities of many research centers in recent years . The depletion in the conventional fossil fuels and increases of greenhouse gas emissions has led to an extensive interest in the innovation in thermal energy storage (TES) technologies.…”

Structural and optical properties of wet-chemistry Cu co-doped ZnTiO3 thin films deposited by spin coating method

“…Perovskite-type titanates with the general formula MTiO 3 (M is a alkali earth or transition metals) have attracted much attention for the important technological applications in the electronics industry, due to their excellent inherent chemical and physical properties such as photoelectricity, photorefractivity, ferroelectricity, as well as high dielectric constant [1][2][3]. Particularly, Zinc titanate ZnTiO 3 nanostructures have been an active area of research because of their remarkable electrical properties leading to the wide practical applications in microwave resonator, gas sensors, microelectronics and photocatalytic [4][5][6].…”

“…More interest has been given to probe the optical and electrical properties of Zinc titanates by doping with some transition metal ions [7][8][9][10]. Kim et al and other researchers [7][8][9][10] tried to obtain suitable dielectric properties by controlling composition in Zn x Mg 1-x TiO 3 and Zn x Co 1-x TiO 3 systems. Doped or undoped ZnTiO 3 films can be prepared by many techniques such as RF magnetron sputtering pulsed laser deposition and the sol-gel method [11][12][13].…”