Synthesis and Characterization of New Ferrite-Lignin Hybrids.
Iuliana SpiridonIoan-Andrei DascaluAdina CoroabăIrina ApostolMircea Nicolae PalamaruAlexandra Raluca IordanAdrian Iulian BorhanPublished in: Polymers (2021)
The paper presents the synthesis and characterization of new cobalt ferrite-lignin hybrids. The hybrids were obtained through the combustion of cobalt nitrate and ferric nitrate, two kinds of lignin being used as combustion agents. The temperatures of calcination were 500 °C and 900 °C, respectively. The hybrids were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), and X-ray photoelectron spectroscopy (XPS). The magnetic properties were also assessed by vibrating sample magnetometer system (VSM). This facile synthesis method made it possible to obtain cobalt ferrite-lignin hybrids with a spinel structure. Their particle sizes and crystallite sizes have increased with an increment in the calcination temperature. A different occupancy of cations at octahedral and tetrahedral sites also occurred upon the increase in temperature. The hybrids comprising organic lignin presented the best magnetic properties.
Keyphrases
- electron microscopy
- ionic liquid
- high resolution
- nitric oxide
- dual energy
- particulate matter
- molecularly imprinted
- drinking water
- reduced graphene oxide
- carbon nanotubes
- sewage sludge
- solid phase extraction
- single molecule
- magnetic resonance
- mass spectrometry
- air pollution
- municipal solid waste
- tandem mass spectrometry
- metal organic framework