N2O decomposition over (CaO)(1-x)(MO)(x) oxide systems (M=Ti, Cr): Relation with photoluminescence

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N2O decomposition over (CaO)(1-x)(MO)(x) oxide systems (M=Ti, Cr): Relation with photoluminescence (EN)

Loukatzikou, L. A. (EN)

Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας (EL)
Loukatzikou, L. A. (EN)

(CaO)(1-x)(MO)(x) oxide systems (M = Ti, Cr, x = 0-1), prepared at 1150 degrees C under atmospheric conditions, were investigated for their photoluminescence as well as for their catalytic activity in N2O decomposition in the temperature range 400-650 degrees C. As shown by XRD analysis, the solids are either multicomponent systems or simple phase oxides. Titanium addition to CaO of up to 30% results in a significant enhancement of the catalytic activity, while chromium addition beyond 1% has the reverse effect; solids rich in Ti or Cr are rather inactive. Thus, the systems showing considerable activity are either simple phase CaO, or CaO-CaTiO3 mixed oxides. The photoluminescence intensity of the catalysts was found to be suppressed by addition of Cr or Ti (>0.5%) to CaO. Although the catalytic activity is affected in different ways by addition of Ti or Cr, and a variety of structural composition are noted for the (CaO)(1-x)(MO)(x) catalysts, a relation between catalytic activity and photoluminescence is observed, not only across each sample series, but also for the total set of catalysts. (EN)

promoted mgo catalysts (EN)

Journal of Materials Chemistry (EN)



Royal Society of Chemistry (EN)

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