Effect of Ag-doping of nanosized FeAlO system on its structural, surface and catalytic properties
Laila I. Ali; El-Molla, SA; Amin, NH; Ebrahim, AA; Mahmoud, HR;
Abstract
The effects of Ag2O-doping on the physicochemical, surface and catalytic properties of FeAlO system with various extents of Fe2O3 loading have been investigated. The dopant concentration was changed between 1.5 and 4.0 mol % Ag2O. Pure and variously doped solids were subjected to heat treatment at 400–800 °C. The techniques employed for characterization of catalysts were TG/DTG, XRD, N2-adsorption at −196 °C and the catalytic decomposition of H2O2 at 25–40 °C. The results obtained revealed that, the investigated catalysts consisted of nanosized γ-Al2O3 phase. The textural properties including SBET, porosity and St were modified by Ag2O-doping. The doping process with Ag-species improves the catalytic activity of FeAlO system. Increasing the precalcination temperature from 400 to 800 °C increases the catalytic activity of 3.5% AgFeAlO with 1.9-fold toward H2O2 decomposition at 30 °C. Furthermore, the maximum increase in the catalytic activity due to doping with 3.5 mol % Ag2O at 30 °C attained about 15.1-fold for the solids calcined at 800 °C.
Other data
Title | Effect of Ag-doping of nanosized FeAlO system on its structural, surface and catalytic properties | Authors | Laila I. Ali ; El-Molla, SA; Amin, NH; Ebrahim, AA; Mahmoud, HR | Keywords | Fe2O3/Al2O3 catalyst; Ag2O-doping; Surface; Amorphous materials; H2O2 decomposition; SOLID-SOLID INTERACTION; PHYSICOCHEMICAL PROPERTIES; CO OXIDATION; MIXED OXIDES; IRON-OXIDE; DECOMPOSITION; MANGANESE; HYDROGEN; LI2O; TEMPERATURE | Issue Date | 2016 | Publisher | ELSEVIER SCIENCE BV | Journal | Arabian Journal of Chemistry | ISSN | 1878-5352 | DOI | 10.1016/j.arabjc.2012.01.009 | Scopus ID | 2-s2.0-84857303325 | Web of science ID | WOS:000390879400043 |
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