Abstract
The oxidative degradation of Orange G dye by nanosized CeO2 catalyst has been performed in this study. The catalyst was prepared by precipitation method. Various characterization techniques were carried out to study the physical and chemical properties of the synthesized catalyst. The XRD result confirms well the formation of CeO2 cubic phase. The FTIR result showed the effect of calcination temperature for CeO2 was clearly observed due to reduction in band intensity compared to uncalcined Ce nitrate sample. Meanwhile, the diffused reflection spectra recorded reflection spectra at 414 nm with an energy gap of 3.2 ev. The decolorization of Orange G dye by oxidation process were carried out under various conditions such as, the effects of H2O2 dosage , pH, catalyst dosage and the temperature of reaction. The optimum conditions for the highest decolorization efficiency (100%) were achieved at 10 mg/L of orange G dye with catalyst dosage of 1.5 g/L, pH 2, reaction temperature of 65 °C and 0.1 mL H2O2.
Highlights
Different shapes and sizes of semiconductor nanoparticles have been synthesized to be used in the application of advanced oxidation process [1]
Special attention has been focused on the formation and properties of cerium oxide which is important as heterogeneous catalyst [3]
The results show that the maximum decolorization efficiency of 100% was obtained at a pH of 2 after 60 min of oxidation process
Summary
Different shapes and sizes of semiconductor nanoparticles have been synthesized to be used in the application of advanced oxidation process [1]. Special attention has been focused on the formation and properties of cerium oxide which is important as heterogeneous catalyst [3]. Cerium dioxide has been taken a great interest in the application of heterogeneous photocatalytic reactions This was due to the properties of CeO2 as a semiconducting material that absorbs light in the near UV and slightly in the visible region. This report have been focused on the degradation of orange G dyes using nano CeO2 as heterogeneous catalyst using oxidation process. The stability of the catalyst is excluded as the aim was focusing on the experimental work covering thorough characterization and process study under various conditions
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