“…6b) shows the three main typical silica bands detectable in the regions near to 450 cm −1 , 800 cm −1 and 1100 cm −1 , which are attributed to stretching vibration of Si O Si, Si O Si and Si O C, respectively Naghsh, Sadeghi, Moheb, Chenar, & Mohagheghian, 2012). The presence of those peaks (at 450 cm −1 , 800 cm −1 and 1100 cm −1 ) strongly suggests that chemical bonding between cellulose and silica was formed after superficial modification (Ashori et al, 2012;Machado et al, 2011;Nassar et al, 2007;Shi et al, 2013).…”