Synthesis and characterization of iron/niobium composites: Catalyst for dye wastewater treatments

Conversion of CO2 to Light Olefins Over Iron-Based Catalysts Supported on Niobium Oxide

“…Niobium oxide presents a broad peak above 1,173 K. Nevertheless, this peak is not clear or is shifted to higher temperatures in the impregnated catalysts. This point has already been observed in other works and may be due to metal-support interaction, which may affect the reducibility of the Nb 2 O 5 (Eleutério et al, 1998;Noronha et al, 2000;Rezende et al, 2012;Hernández Mejía et al, 2017).…”

Niobium: The Focus on Catalytic Application in the Conversion of Biomass and Biomass Derivatives

“…The ROS formation via UV irradiation combined with H 2 O 2 treatment of niobium pentoxide can be used in environmental protection for dyes removal from wastewater. Niobium pentoxide is a wide bandgap semiconductor that has been successfully used as a photocatalyst for the degradation of various organic compounds [ 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 ]. This metal oxide is also a promising catalyst for oxidation processes with the use of hydrogen peroxide as oxidant because it activates H 2 O 2 to form ROS such as hydroxyl radicals (•OH), superoxide radical anions (O 2 •−) and peroxo species (O 2 2− ), which are highly active in the oxidation of organic compounds [ 53 , 54 , 55 , 56 ].…”

Synthesis, characterization and evaluation of iron oxides and niobium in the removal of dyes in Fenton type reactions and photocatalysis

“…The catalytic results demonstrate that the combined materials of iron oxides and niobium have high potential in organic compounds oxidation reactions, mainly materials with small niobium concentration. Other works have also reported the efficiency of these materials and the importance of niobium for their catalytic activity [26].…”