SrCrxFe12-xO19 nanoceramics as an effective catalyst for desulfurization of liquid fuels: Green sol-gel synthesis, characterization, magnetic and optical properties.

In this work, SrCrxFe12-xO19 (x = 0.0, 0.5, 1.0, 1.5) nanostructures were successfully synthesized by sol-gel auto-combustion method, and different aminoacids were used as green reductants. Various analysis results show that SrCrxFe12-xO19 nanoparticles synthesized successfully.The present study shows that SrCrxFe12-xO19 nanoparticle could be used as adsorbent for the desulfurization of liquid fuels. Increasing of nanoparticles concentration was caused to increase the adsorption rate of sulfur contents of fuel. The adsorption rate of sulfur contents of fuel in various concentrations 4.5, 9.5, and 18.5 g. L -1 of SrCrxFe12-xO19 nanoparticles in solution was estimated about 39, 50, and 62% for 30 min, respectively. The results of catalytic tests reveals that SrCrxFe12-xO19 nanoparticles have the potential to be used as a new kind of semiconductor catalysts for the desulfurization of liquid fuels. Magnetic property of the final sample was measured at room temperature by a vibration sample magnetometer (VSM) and shown that the intrinsic coercivity of product is about 6000 Oe and it exhibits characteristics of single magnetic domains (Mr/ Ms = 0.53)

EDS spectrum of sample 6.

<p>EDS spectrum of sample 6.</p

SEM image.

<p>(a) sample 1, (b) sample 2, (c) sample 3, (d) sample 4 and (e) sample 5.</p

Magnetization versus applied magnetic field at room temperature for sample 6.

<p>Magnetization versus applied magnetic field at room temperature for sample 6.</p

XPS spectrum of sample 6.

<p>XPS spectrum of sample 6.</p

TEM image of sample 6.

<p>TEM image of sample 6.</p

Effect of contact time on removal rate of sulfur at different concentrations of nanoparticles.

<p>Effect of contact time on removal rate of sulfur at different concentrations of nanoparticles.</p

Effect of temperature on removal of total sulphur was studied at range 15–55°C.

<p>Effect of temperature on removal of total sulphur was studied at range 15–55°C.</p

XRD pattern.

<p>(a) sample 7, and (b) sample 8.</p

Catalytic activities of sample 6 in three concentrations.

<p>(a) 4.5 g. L ^-1, (b) 9.5 g. L ^-1, and (c) 18.5 g. L ^-1.</p