Effect of the atomic active metal ratio in Al/Fe-, Al/Cu- and Al/(Fe–Cu)-intercalating solutions on the physicochemical properties and catalytic activity of pillared clays in the CWPO of methyl orange

摘要: Abstract The effect of the composition intercalating solutions in catalytic performance derived pillared clays has been studied. A Colombian bentonite was treated with Al/Fe-, Al/Cu- and Al/(Fe–Cu)-solutions, resulting solids were used wet peroxide oxidation (CWPO) azo dye methyl orange (MO) aqueous solutions. active metal ratio (AMR), here defined as atomic percent between metals (Fe Cu) total content (Al, Fe and/or solutions, found to be a key factor for properties solids. Low AMR values, 0 10%, considered, efficiency incorporation into layered structure followed by chemical analyses cationic-exchange capacity measurements. Further characterization studies carried out X-ray diffraction, H2 temperature-programmed reduction, scanning electron microscopy/energy dispersive analysis, nitrogen adsorption at −196 °C thermal analysis. Considering physicochemical together performance, it is proposed that isomorphic Al13-like polycations may take place. obtained exhibited better values lowered corresponding displaying also high stability leaching strongly oxidizing environment reaction, especially binary Al/Fe- Al/Cu-systems. Al/Fe-pillared attained most their maximal removal solution after only 1 h reaction very mild experimental conditions (room temperature atmospheric pressure 18 °C 0.7 atm).