SiO2-TiO2 mixed oxides was prepared by the homogeneous precipitation method using tetraethoxysilane and tetrabutyl titanate as precursors. Zinc catalyst supported on SiO2-TiO2 was prepared by the incipient wetness impregnation method and employed as effective catalyst for the direct synthesis of diphenyl carbonate from carbon dioxide and phenol. The stability of the heterogeneous catalyst was also studied in detail. No significant loss of activity ...
