SYNTHESIS AND CHARACTERISTIC OF NANOSILICA FROM GEOTHERMAL SLUDGE: EFFECT OF SURFACTANT

In the synthesis of nanoparticles, phenomenon agglomeration is an undesirable condition because particles formed can be larger. The use surfactants prevent occurrence this phenomenon. study, was studied in nanosilica from geothermal sludge. method applied sol-gel method. A 1 M sodium hydroxide (NaOH) solution used to prepare sol phase, while gel phase prepared at pH 5 using a 1.5 hydrochloric acid (HCl) solution. were alkyl benzene sulfonate (ABS), cetyltrimethylammonium bromide (CTAB), dodecyl sulfate (SDS), and polyvinylpyrrolidone (PVP). surfactant added precursor critical micelle concentration (CMC), where CMC values for each 0.15, 0.05, 0.50, 1.00 wt% ABS, CTAB, SDS, PVP, respectively. experimental results showed that without could produce product with purity 98.03%. Even though already high, resulting experiences needed minimize product. gives best quality particle size range 2.01–3.65 nm. However, produced PVP has low purity, 56.67%. It chloride (NaCl) trapped template.