Modified-EISA synthesis of mesoporous high surface area CeO2 and catalytic property for CO oxidation

Mesoporous CeO2 particles with high surface area were synthesized using a modified evaporation-induced self assembly(EISA) method which combined citric acid as complexing agent. As-prepared powder and further thermal treatment samples were characterized by X-ray diffraction(XRD), transmission electron microscopy(TEM), selected area electron diffraction(SAED), Fourier transform infrared spectrometer(FTIR), thermogravimetry and differential thermal analysis(TG-DTA), Brunauer-Emmett-Teller(BET) and Barrett-Joyner-Halenda (BJH) method. It was found that the cerium oxide/surfactant mixture gave rise to pure and fluorite-structured CeO2 after calcination at 573 K. Moreover, the textural analysis revealed high specific surface area (205 m2/g) and mesoporous structure of the sample. The catalytic performances of mesoporous CeO2 heated at different temperatures for CO oxidation were examined. The catalytic tests exhibited that the product had enhanced catalytic efficiency compared with the decomposed ceria.