The decomposition of the Ethiopian Kenticha tantalite ore was studied using the KOH fusion and H2O leaching system at 400 0C for a 1 h reaction time. The experimental results obtained showed that 27 wt% of Ta2O5 was mainly transformed into insoluble KTaO3, not to be KNbO3, and as well, into the dissolved liquor containing 94.73 vol% of Nb2O5 and 75.80 vol% of Ta2O5. The observations, supported ...

5-Hydroxymethylfurfural (HMF) is one of the most important lignocellulosic biomass-derived platform molecules for production renewable fuel additives, liquid hydrocarbon fuels, and value-added chemicals. The present work developed niobium oxides (Nb2O5) supported on mesoporous carbon/silica nanocomposite (MCS), as novel solid base catalyst synthesis HMF via one-pot glucose conversion in a bipha...

Ti- and Nb- containing NiO catalysts have been synthesized by two different preparation methods: i) precipitation (Me-Ni-O oxides, Me = Nb or Ti), in order to prepare promoted catalysts; ii) wet impregnation on TiO2 NbOx supports, diluted/supported catalysts. The also characterized tested the oxidative dehydrogenation of ethane. catalytic performance Nb-promoted strongly depends composition, al...

In this study, ZnO/TiO2 and ZnO/Nb2O5 photocatalysts were evaluated in the river pollution remediation wastewater treatment from textile factories, thus, target pollutants selected for study enteropathogenic bacteria commercial dyes. The mixed oxide systems extensively analyzed order to explore their physicochemical properties. From analysis, it was found that coupling of two oxides did not mod...

Amorphous films of Nb2O5 composition were deposited by thermal atomic layer deposition on (001) Si substrates and subsequently crystallized annealing in forming gas at temperatures ranging from 550 °C to 1000 °C. After subjecting these an 850 anneal, cross-sectional transmission electron microscopy revealed the presence B-Nb2O5 T-Nb2O5 phases matrix, as well reduced R-NbO2 floret-shaped regions...

Sr5Nb4O15 – Nb2O5 nanocomposites were synthesized in 2 and 4 M KOH aqueous solutions, via a non-stoichiometric 1:2 Sr:Nb molar ratio hydrothermal method at 160°C for 48 h (S1 and S2, respectively). Sr(NO3)2 and Nb2O5 were used as raw materials. The synthesized nanomaterials were characterized by powder X-Ray diffraction (PXRD) technique. It was found that Sr5Nb4O15 has been crystallized in hexa...