Synthesis of mesoporous cerium-zirconium mixed oxides by hydrothermal templating method

Abstract

Mesoporous cerium-zirconium mixed oxides were prepared by hydrothermal method using cetyl trimethyl ammonium bromide (CTAB) as template. The effects of amount of template, pH value of solution and hydrothermal temperature on mesostructure of samples were systematically investigated. The final products were characterized by XRD, TEM, FT-IR, and BET. The results indicate that all the cerium-zirconium mixed oxides present a meso-structure. At molar ratio of n(CTAB)/n((Ce)+(Zr))=0.15, pH value of 9, and hydrothermal temperature of 120 °C, the samples obtained possess a specific surface area of 207.9 m²/g with pore diameter of 3.70 nm and pore volume of 0.19 cm³/g.

Keywords

cerium-zirconium mixed oxides / hydrothermal method / cetyl trimethyl ammonium bromide / mesopore / template

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