Iron oxides are the main minerals in Brazilian iron deposits, hematite, magnetite, and goethite being the most important. These ore-minerals present different chemical, physical, and electrokinetic properties. Aiming to ...

The metal oxides and hydroxides, such as iron oxides, become charged when dispersed in water. Changes in the oxides surface and the formation of interface between the electrically charged particles and water are controlled ...

This work describes hematite films prepared by a spin-coating deposition solution (SCDS) method that is a sol-gel method derived technique. Hematite films were prepared at two heat treatment temperatures (500 °C and 800 ...

The effect of zinc on the performance of hematite-based catalysts in ethylbenzene dehydrogenation was studied. Zinc acts as a structural promoter stabilizing the active phase of the catalysts.

Aluminium-rich hematite was found to catalyze the water gas shift reaction but there is a compromise between the increase in specific surface area and the intrinsic activity.

The effect of neodymium, lanthanum, aluminum and zirconium on the textural and catalytic properties of hematite was studied in this work, which aimed to develop catalysts to ethylbenzene dehydrogenation, in the presence ...

Spindle-type iron fine particles have been prepared by reduction of silica-coated-hematite particles. Hydrogen reduction of the coated-hematite cores yielded uniform spindle-type iron particles, which were stabilized by ...

Spindle-type iron fine particles have been prepared by reduction of silica-coated-hematite particles. Hydrogen reduction of the coated-hematite cores yielded uniform spindle-type iron particles, which were stabilized by ...