Effects of K2O–Li2O doping on surface and catalytic properties of Fe2O3/Cr2O3 system

New solid solution Fe1−xCrxVSbO6 with rutile-type structure

“…The diffraction patterns of preparations obtained both from the oxides and from previously prepared FeVSbO 6 and CrVSbO 6 showed, on the last heating stages, the presence of the set of diffraction lines that were shifted towards higher diffraction angles (2 ) in comparison to the set of the lines characteristic of the FeVSbO 6 compound. In comparison to the diffraction pattern of CrVSbO 6 , these lines were shifted towards smaller angles, so they corresponded to bigger d values.…”

“…Usually mixtures of oxides and compounds forming from them as well as the solid solutions of the structures of these compounds, show better properties from the viewpoint of applications than individual oxides [1][2][3][4]. Tetragonal MM 1 SbO 6 , where M = Cr, Fe, Rh; M 1 = Ge, Ru, Sn, Te, Ti, V of rutile-type structures have been reported and characterised recently because of their interesting functional properties [5][6][7][8].…”

Nanocomposites For Optical Properties and Effective Photocatalytic Degradation of Pollutants in Water

“…Chromium oxide is a p-type semiconductor with wide band gap energy (~ 3 eV) (Singh et al, 2019). It also possesses excellent optical and electrical properties, is low cost, chemically stable, nontoxic, and has surface properties that affect its usage as an industrial catalyst in many reactions (Salaeva et al, 2019;El-Shobaky et al, 2011;Jibril, 2004) Chromium has different stable oxidation states hence the formation and properties of chromium oxide (Cr2O3) are important for applied applications such as in hightemperature resistant materials (Jaswal et al, 2014) corrosive resistant materials (Li et al, 2001), liquid crystal displays (Jaswal et al, 2014;Subhan et al, 2019;Freemantle, 1998), green pigment (Fasick et al, 1999) and catalysts (Rotter et al, 2004;Mei et al, 2019). The most effective method to enhance and control the electrical and optical properties of metal oxides is to mix them with selective elements (Viswanatha et al, 2012).…”