Preparation and characterization of CuFe2O4 bulk catalysts

Effect of Co and Fe substitution on catalytic VOCs removal on zinc aluminate

“…The total conversion of propane was observed at temperatures between 400 and 500 • C for Co and Ni ferrospinels [28] while for Cu ferrospinels [29] between 500 and 700 • C, depending on their chemical composition and method of preparation. Nanocrystalline mesoporous Co-containing spinels were studied by Carreon et al [30] showing that good performances in propane oxidation can be related to their morphological and structural properties.…”

Preparation, characterization and application of nanosized copper ferrite photocatalysts for dye degradation under UV irradiation

“…The second effect with maximum close to 280 C is related to the reduction of copper ferrites to metallic Cu and Fe 2 O 3 , and to the subsequent reduction of Fe 2 O 3 -hematite to Fe 3 O 4 -magnetite. The high temperature peak located around 600 C should be associated to the reduction of Fe 3 O 4 to FeO, followed by the reduction to metallic Fe [15,26,37]. Probably dissociative adsorption of hydrogen on the first Cu crystallites favors reduction of the other species at lower temperature than when in the bulk form.…”

“…completed around 350 C is observed in the TG curves of all samples. The major mass loss might be related to the thermal decomposition of ferrite precursors and starting of formation of the copper ferrite phase Cu x Fe 3-x O 4 (x ¼ 0.25,0.5,1) [4,15,32]. The process is recorded also as a sharp and intense endothermic process in the DTA curve, with a minimum close to 100 C. Noticeable exothermic effects in the DTA plots are detected below 600 C, but without an associated mass change and can be due to the crystallization of a copper substituted magnetite structure [33].…”

“…Copper ferrite materials can be produced by various procedures, such as sonochemical method [9], ceramic method [2,10], hydrothermal route [3] or hydrothermal route coupled with a reverse micelle method [11], solid state reactions [12e15], coprecipitation [14e18], solegel [14], auto-combustion method [19], microwave-induced combustion process [20], electrospinning method [4], soft chemical methods e a complexation method and a self-propagating combustion [8], citric acid-aided process [15], etc.…”

Structural and Morphological Studies of Copper-Doped Nickel Ferrite

“…Nanosized copper spinel ferrites show unusual properties in comparison with their bulk analogs and receive enormous attention during the last decade because of their potential applications. They can be obtained by a variety of methods such as solid-state reaction [16].…”