<![CDATA[Synthesis and characterization of silica-based xerogel Bangka quartz sand has been done through the sol-gel method. Synthesis is done with the first is the manufacture of sodium silicate precursor and then the addition of HCl to pH 1 and the addition of 1M NaOH to pH 7 for sol formation, Aging then performed gel (gel aging) as a polymerization reaction completion. HCl concentration and aging time are used respectively - were 0.5, 1 and 2 M then 12, 18 and 24 hours. Gel that had formed was washed with distilled water and printed in the syringe then dried in an oven for 18 hours at a temperature of 80 0C. Based on the test results the surface area of the methylene blue is the optimum condition in 0.5 M HCl and aging time of 12 hours. The surface area of the silica xerogel is 9.060 m2g-1. Characterization by FTIR showed wide uptake in wave numbers 3468.84 cm-1 is the OH groups of Si-OH and Si-O of Si-O-Si in the wave number 1080.06 cm-1. XRD results produce is amorphous silica xerogel. Keywords: Sol-gel, Sodium silicate, xerogel.]]>
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