sonocatalytic degradation of methyl red by sonochemically synthesized tio2-sio2/chitosan nanocomposite

Tio2-sio2/chitosan nanocomposite was synthesized using simple sonochemical technique. the characteristics of the synthesized nanocomposite were examined by tem, sem and edx analysis. the performance of the prepared tio2-sio2/chitosan nanocomposite as efficient sonocatalyst was investigated for the degradation of methyl red. sonocatalytic degradation of methyl red in the presence of tio2-sio2/chitosan nanocomposite could be described via the mechanisms of hot spots and sonoluminescence. the optimized values for main operational parameters were detected as ph of 3, tio2-sio2/chitosan dosage of 450 mg/l, methyl red initial concentration of 20 mg/l and ultrasonic power of 300 w. under optimal conditions, the sonocatalytic degradation of methyl red was 99.1 %. based on the obtained results, tio2-sio2/chitosan nanocomposite could be an excellent selectivity for sonocatalytic degradation of anionic dyes such as methyl red.