Abstract
In this work, powders of ZnO-CeO2 nanocomposites were synthesized and with these powders ceramic pieces were shaped using a colloidal method (slip casting). The effect of the pieces on gases emitted by a motorcycle was then determined. The nanocomposites were characterized using X-ray diffraction (XRD), infrared (IR) – UV–visible absorption – diffuse reflectance and photoluminescence spectroscopies (PL), and scanning and transmission electron microscopies (TEM). The pieces sintered at 700 °C had a porosity of ∼ 12% and a grain size of the nanometer order. On coming into contact with the exhaust fumes emitted by the motorcycle, the ceramic pieces reduced the amount of polluting gases emitted by between ∼ 10% and ∼ 20%, depending on the speed of the motorcycle. It was found that the most effective of the composites for most gases examined was that containing 5% ceria, with a gas emission reduction higher than 15%, while for CO the 1% ceria ZnO-CeO2 composite was most effective, this time with a ~ 13% reduction.
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