Synthesis and Characterization of Silica Gel from Palm Shell and Coir Ash

This study aims to determine the composition of oxide, characteristics palm shell and coir, silica gel synthesized. The oxide composition, crystallinity, coir ash functional groups were analyzed using XRF, XRD, FTIR. Analysis crystallinity FT-IR XRD. results showed SiO2 in was 76%, form quartz cristobalite more dominant than amorphous SiO2. synthesis success indicated by appearance peaks with low intensity, not sharp, resembling bumps on synthesized diffractogram, which is an characteristic. result confirmed FT-IR, where absorption at wave number 455 cm-1 a Si-O-Si bending vibration, 783 stretching vibration Si-O symmetry Si-O-Si, 3454.51 cm-1, 3568 fairly high intensity are characteristic -OH group from Si-OH. wide sharp 1083.99 1625.99 water molecule, 798.53 462.92 indicates Si-O-Si.