The effect of sulfate contents on the surface properties of iron–manganese doped sulfated zirconia catalysts

Abstract

The iron-manganese doped sulfated zirconia catalysts were prepared via precipitation method; the sulfation was carried out by impregnation with different amounts of sulfate (4%, 10% and 16% SO4− 2 by weight) with the addition of Fe-Mn doped and calcined at 600 °C for 3 h. The prepared catalysts were characterized by TGA-DTA, XRD, BET, FT-IR, TEM, TPD-NH3 and XPS. XRD and BET results revealed that the addition of sulfate imparts special stabilization to the catalytically active tetragonal phase of zirconia. All the ironmanganese doped sulfated zirconia catalysts were found to have strong acid sites, high surface area and small crystallite size.

Characterization of Ag-promoted Ni/SiO2 Catalysts for Syngas Production via Carbon Dioxide (CO2) Dry Reforming of Glycerol

“…Calcination profiles of Ni/SiO2, Ag(1)-Ni/SiO2, Ag(3)-Ni/SiO2 and Ag(5)-Ni/SiO2 presented in Figure 4 shows three stages of weight loss between 300 K to 650 K. Peaks formation between 300 K to 400 K are due to the removal of water vapour in the catalysts [12]. The second stage of weight loss is between 400 K and 523 K, showing two peaks resulting from the dehydration of hydrated silicon oxide for the final formation of SiO2, which is correlated to XRD study.…”

Cytotoxicity and physicochemical characterization of iron–manganese-doped sulfated zirconia nanoparticles

“…Moreover, the spectrum is a clear verification of the presence of iron(+3) that is almost similar to the Fe 2 O 3 spectrum. 40,47 Mn photoelectron lines could be distinguished only with a rather deprived noisy signal. Figure 1E depicts the photoelectron peaks of the iron(3+)-manganese-doped sulfated ZrO 2 substance in the region of the 2p level of Mn.…”

“…A diffractometer employing Cu-Kα radiation generated by a Philips glass diffraction X-ray tube broad focus 2.7 kW type was used at ambient temperature. The crystallite size (T) of the samples was calculated by the Debye-Scherrer relationship according to standard procedures: [40][41][42] T =0.9 λ/(β cos θ),…”

Biodiesel Synthesis Catalyzed by Transition Metal Oxides: Ferric-Manganese Doped Tungstated/Molybdena Nanoparticle Catalyst

“…The Cu-K α radiation was generated by using the Philips glass diffraction X-ray tube broad focus 2.7 kW type. The crystallite size D of the samples was calculated using the Debye-Scherrer s relationship 13,14 .…”