Synthesis of amorphous silica from rice husk ash using the sol–gel method: Effect of alkaline and alkaline concentration
Sri Aprilia, Cut Meurah Rosnelly, Zuhra, Fitriani Fitriani, Emir Haffiz Akbar, Muhammad Raqib, Khairul Rahmah, Amri Amin, Rima Aidi Baity
Abstract
In this study, silica extraction from RHA (rice husk ash) has been successfully performed by alkaline using KOH and NaOH with sol–gel precipitation. The silica gel was characterized for the functional group by FTIR, crystallinity with XRD , structure silica with SEM and particle size with PSA. The results show the higher concentration of solvent led to higher silica. The FTIR analysis revealed vibrations of Si O and Si O Si on the product. Additionally, observed to be amorphous and aggregated, the silica extracted from RHA also exhibited a decrease in all samples.
Topics & Concepts
HuskCrystallinityFourier transform infrared spectroscopySol-gelSilica gelChemistryNuclear chemistryAmorphous solidParticle sizeExtraction (chemistry)PrecipitationAmorphous silicaMaterials scienceChemical engineeringChromatographyOrganic chemistryNanotechnologyBiologyPhysical chemistryMeteorologyPhysicsBotanyEngineeringCrystallographyClay minerals and soil interactionsGlass properties and applicationsRecycling and utilization of industrial and municipal waste in materials production