Pengaruh Variasi Penambahan Metil Oleat sebagai Template terhadap Porositas Kalsium Silikat dari Abu Sekam Padi

Abstract

Research has been carried out on the formation of calcium silicate pores from rice husk ash without a template and with the addition of methyl oleate as a template. This synthesis was carried out by extracting silica from rice husk ash using an alkaline method using 10% NaOH and then adding CaCl2. Calcium silicate without template resulting from calcination was then characterized. The FT-IR spectrum shows the presence of Si-O-Si, Si-O-Ca and Si-OH groups which indicate calcium silicate material. Characterization using XRD showed diffraction peaks of Wollastonite (CaSiO3), Alite (Ca3SiO5) and larnite (Ca2SiO4) crystals. The results of BET calcium silicate analysis showed pore size, pore volume and surface area respectively 9.53 nm; 0.012 cc/g and 2.54 m2/g. Preparation of calcium silicate with a variation of the mass of the methyl oleate template, namely 2g; 4g; and 6g. The BET analysis results obtained showed a pore size of 8.82 nm; 6.16nm; 5.26 nm, pore volume respectively; 0.010 cc/g; 0.008 cc/g; 0.007 cc/g and surface area respectively; 2.69 m2/g, 2.87 m2/g; 3.28 m2/g. Nitrogen adsorption desorption isotherm (BET) shows a type IV isotherm curve where there is a multilayer formation of adsorption-desorption curves with H3 type hysteresis loops in silica material.