Preparation of mesoporous titania solid superacid and its catalytic property.
Mesoporous titania (TiO(2)) was synthesized by hydrothermal method using cetyltrimethyl ammonium bromide (CTAB) as a template and using anhydrous ethanol and tetra-n-butyl titanate (TBOT) as raw materials. Mesoporous titania solid superacid and nanosized titania solid superacid catalysts were prepared by wet impregnation method. The structure and property of as-prepared samples were characterized by means of XRD, FT-IR and N(2) physical adsorption. The esterification of salicylic acid with isoamyl alcohol and the condensation of cyclohexanone with ethylene were used as model reactions to test the catalytic activities of the catalysts. On the other hand, the comparison of catalytic activities of the prepared solid superacid catalysts and the conventional liquid acid H(2)SO(4) was also carried out under the same experimental conditions. The results show that the catalytic activities of the prepared solid superacid catalysts were higher than that of the conventional liquid acid H(2)SO(4), and that the catalytic activity of mesoporous TiO(2) solid superacid is the highest among the three catalysts. Mesoporous TiO(2) solid superacid is a good catalyst for the synthesis of isoamyl salicylate or cyclohexanone ethylene ketal.
Jiang
Tingshun
T
School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, PR China.
Zhao
Qian
Q
Li
Mei
M
Yin
Hengbo
H
D002384:Catalysis; D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000737:chemistry; D003512:Cyclohexanones / Q000737:chemistry; D005030:Ethylenes / Q000737:chemistry; D007202:Indicators and Reagents; D000439:Pentanols / Q000737:chemistry; D016062:Porosity; D020156:Salicylic Acid / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013464:Sulfuric Acids / Q000737:chemistry; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
D002593:Cetrimonium Compounds; D003512:Cyclohexanones; D005030:Ethylenes; D007202:Indicators and Reagents; D000439:Pentanols; D013464:Sulfuric Acids; C009495:titanium dioxide; C036468:cyclohexanone; D014025:Titanium; C029683:isopentyl alcohol; D020156:Salicylic Acid; D000077286:Cetrimonium