Sonocatalytic degradation of methyl red by sonochemically synthesized TiO۲-SiO۲/chitosan nanocomposite

TiO۲-SiO۲/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 TiO۲-SiO۲/chitosan nanocomposite as efficient sonocatalyst was investigated for the degradation of methyl red. Sonocatalytic degradation of methyl red in the presence of TiO۲-SiO۲/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 ۳, TiO۲-SiO۲/chitosan dosage of ۴۵۰ mg/L, methyl red initial concentration of ۲۰ mg/L and ultrasonic power of ۳۰۰ W. Under optimal conditions, the sonocatalytic degradation of methyl red was ۹۹.۱ %. Based on the obtained results, TiO۲-SiO۲/chitosan nanocomposite could be an excellent selectivity for sonocatalytic degradation of anionic dyes such as methyl red.

Keywords:

TiO۲-SiO۲/chitosan nanocomposite , sonochemical technique , Sonocatalytic Degradation , Methyl Red