Synthesis, Optical and Electrical Properties of ZnFe₂O₄ Nanocomposites

Abstract

ZnFe2O4 nanocomposites have been prepared by a simple co-precipitation method. The prepared samples were characterized by Scanning Electron Microscopy (SEM), Powder X-ray Diffraction (XRD), Energy Disperse X-ray Analysis (EDX), Transmission electron microscopy (TEM) and UV-visible absorption spectral techniques. Conductivity measurements show a transition from ferrimagnetism to paramagnetism. The enhancement in fluorescence spectra shows that there is an electronic transition to an exciting level. In UV-Vis spectra, the peak observed at 647nm indicates ZnFe2O4 nanocomposites are a photoactive compound. The above results suggest that these nanomaterials can be used in optoelectronic applications.

Dielectric Properties of Surface Modified TiO2Doped Ortho-chloropolyaniline Nanocomposites

“…This is confirmed from the negative thermal coefficient (NTC) (α) in graphs 4 (b). It is clearly found that the α value increases with increase in concentration of the TiO 2 in OPANI matrix indicates that the thermal resistance of the matrix enhances due to the strong bonding between TiO 2 nanoparticles and matrix [16] The negative coefficient value shows that these materials act as semiconductor at higher temperature [17]. When the temperature rises up, the average amplitude of the atoms vibration within the matrix increases.…”

Investigation of ZnFe2O4 Films Depending on the Complex Agent Ratio

“…Çinko ferrit filmlerinin absorpsiyon spektrumu Şekil 4'te verilmektedir. Optik olarak aktif çinko ferrit filmlerinin Uv-Vis bölgesinde güçlü absorpsiyon yaptığı bilinmektedir (Kumar, 2012). Optik özelliklerin Beer-Lambert yasasıyla örtüştüğünü yaklaşık 334 nm'de tespit edilen güçlü absorpsiyon bandı göstermektedir.…”

Structural Properties and Cation Distribution in Co2+ and Ho3+ Ions Induced Nanocrystalline ZnFe2O4

“…Zinc ferrite (ZnFe2O4) is a spinel oxide that possesses excellent magnetic and electrical properties as well as excellent chemical and thermal stabilities. ZnFe2O4 oxide has received much attention due to its potential applications in detecting gases [4], as an adsorbent material for hot-gas desulfurization [5], in biomedicine [6], for its magnetic, optical and electrical behaviors [7][8][9][10][11] and catalytic application [12,13]. Recently, zinc ferrite has been used as an efficient heterogeneous Fenton catalyst in degrading organic pollutants from an aqueous solution [14][15][16].…”