Pengaruh Variasi Penambahan Polietilen Glikol Sebagai Template terhadap Porositas Magnesium Silikat Dari Abu Sekam Padi

Abstract

Research has been carried out on the formation of magnesium silicate pores from rice husk ash with and without the addition of polyethylene glycol as a template. This synthesis was carried out by extracting silica from rice husk ash using an alkaline method using 10% NaOH. Sodium silicate obtained from rice husks is mixed into MgO and 2.4 g of polyethylene glycol is added; 4.8g; and 7.2 g. Magnesium silicate with and without the addition of the polyethylene glycol template obtained was calcined at 9000C for 4 hours, then its characterization was determined. The results of FT-IR spectrum analysis on rice husks indicated the presence of Si-OH groups at a wavelength of 3399.3 cm-1 which is a characteristic of silica material. The results of FT-IR spectrum analysis on magnesium silicate with and without the addition of polyethylene glycol as template showed the presence of Si-OH groups at a wavelength of 3448.72 cm-1 which is a characteristic of silica material. The results of the XRD analysis showed the diffraction peaks of MgSiO3 (enstatite) and Mg2SiO4 (forsterite). The results of BET analysis of magnesium silicate showed that the pore size, pore volume and surface area were 5.36 nm, 0.02 cc/g and 10.09 m2/g, respectively. BET analysis results obtained are different from the results of BET analysis of Magnesium silicate with the addition of polyethylene glycol variations. Magnesium silicate with the addition of 2.4 g polyethylene glycol showed pore size, pore volume and surface area of 6.32 nm, 0.005 cc/g and 9.62 m2/g, respectively. Magnesium silicate with the addition of 4.8 g polyethylene glycol showed pore size, pore volume and surface area of 6.53 nm, 0.003 cc/g and 9.51 m2/g, respectively. Magnesium silicate with the addition of 7.2 g polyethylene glycol showed pore size, pore volume and surface area of 6.88 nm, 0.002 cc/g and 8.95 m2/g.