Hydrolysis of cellulose in the presence of TiO2 and TiO2–SiO2 mixed-oxide under microwave irradiation

The hydrolysis reaction of cellulose was studied under microwave irradiation in presence TiO2 and TiO2-SiO2. The TiO2-SiO2 nanocatalysts with different molar ratio ofTi/Si were successfully prepared via sol-gel process. An exception to catalytic activity was observed for nanocatalyst with a 70 mol% of Ti/Si. It was found that calcinationtemperature strongly affected its reactivity. The suitable calcinations temperature for TiO2 was at 450 ºC, whereas that for TiO2-SiO2 was 700 ºC. The highest product yield was observed at a hydrolysis temperature of 220 ºC for 10 min irradiation tim.The weight ratio of cellulose: catalyst was examined that best weight ratio was 1:0.1 in which the carbohydrate in reaction mixture reached to 6582.37 ppm.

کلیدواژه ها:

Cellulose ، glucose ، hydrolysis ، TiO2-SiO2 nanocatalyst ، microwave