The composites containing various iron compounds and highly microporous carbon spheres were produced and investigated for structural and magnetic properties. Iron citrate, nitrate and chloride were used to prepare samples and the obtained products contained iron, iron carbide or magnetite. All the produced samples were characterized by high porosity and good magnetic properties.
View Article and Find Full Text PDFWe present the study of pristine and calcined f-MWCNTs functionalized by nitrogen-containing functional groups. We focus on the structural and microstructural modification tuned by the previous annealing. However, our primary goal was to analyze the electronic structure and magnetic properties in relation to the structural properties using a multi-technique approach.
View Article and Find Full Text PDFThermal treatment is a post-synthesis treatment that aims to improve the crystallinity and interrelated physical properties of as-prepared materials. This process may also cause some unwanted changes in materials like their oxidation or contamination. In this work, we present the post-synthesis annealing treatments of the amorphous FeCo ( = 0.
View Article and Find Full Text PDFThree heteroleptic complexes of Co(ii) tri--butoxysilanethiolates have been synthesized with piperidine [Co{SSi(OBu)}(ppd)] 1, piperazine [Co{SSi(OBu)}(NH)](μ-ppz)·2CHCN 2, and -ethylimidazole [Co{SSi(OBu)}(etim)] 3. The complexes have been characterized by a single-crystal X-ray, revealing their tetrahedral geometry on Co(ii) coordinated by two nitrogen and two sulfur atoms. Complexes 1 and 3 are mononuclear, whereas 2 is binuclear.
View Article and Find Full Text PDFInt J Biol Macromol
July 2020
The purpose of this study was to synthesize a new magnetic material with antimicrobial properties, incorporated into a biopolymer and containing silver nanoparticles (Ag NP) prepared extract of Eugenia umbelliflora as a reducing agent. Silver nanoparticles incorporated into magnetic nanocomposite O-carboxymethylchitosan/y-FeO/Ag (CMAgE) composite were synthesized using an extract of E. umbelliflora.
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