Preliminary Synthesis of Calcium Silicates using Oil Palm Leaves and Eggshells.

Abstract

A new synthetic procedure is described for the synthesis of calcium silicate derivatives, using natural resources such as eggshell (ES) for calcium and oil palm leaves (OPL) for silica, which do not require prepurification. The reaction is performed by directly converting two weight ratio of the precursors, ES:3OPL and ES:6OPL, to dried-powder form by heat treatment at 900 °C for two hours. The results demonstrate that the concentration of the precursors has an effect on the morphology and crystallinity of the calcium silicate derivatives, mainly Ca2SiO4 and CaSiO3. X-ray diffraction results reveal that the reaction product obtained using a 1:3 ratio is quite pure, and mainly consisted of calcium silicate in the form of Ca2SiO4. The CaSiO3 was also identified in ES:6OPL, together with a small amount of excess non-reacted crystalline silica. Furthermore, a scanning electron microscopy analysis shows that both reaction products have a coarse surface. Copyright © 2020 BCREC Group. All rights reserved

Eco‐friendly preparation and structural characterization of calcium silicates derived from eggshell and silica gel

“…Yudha et al described the synthesis of calcium silicate derivatives using natural resources such as eggshell (ES) for calcium and oil palm leaves for silica. 14 They successfully synthesized via the solid-state reaction the powder materials containing calcium silicate derivatives, mainly Ca 2 SiO 4 and a small amount of CaSiO 3 . Their results demonstrate that the concentration of the precursors has an effect on the micrometer-sized particles' irregular surface morphology and crystallinity of the final powders.…”

“…Yudha et al. described the synthesis of calcium silicate derivatives using natural resources such as eggshell (ES) for calcium and oil palm leaves for silica 14 . They successfully synthesized via the solid‐state reaction the powder materials containing calcium silicate derivatives, mainly Ca 2 SiO 4 and a small amount of CaSiO 3 .…”

Fabrication of Silver-Silica Composite using the Carbo-thermal Degradation of Oil Palm Leaves for the Reduction of p-nitrophenol

“…The chemicals used in this work were of analytical grade and were used as received without any further purification. The OPL powder preparation follows the previously reported procedure (Yudha et al, 2020a).…”

“…The reaction did not require the presence of inert gases such as nitrogen and argon. The XRD pattern showed peaks corresponding to OPL powder, which exhibits amorphous peaks, except two broad peaks at 2θ = 21.6° and 29.9° (Yudha et al, 2020a). The XRD analysis revealed the disappearance of the peaks of the starting materials and the appearance of new peaks of the composite material.…”

“…Recent studies have demonstrated that OPL can be used to obtain significant amounts of silica to prepare diverse materials (Onoja et al, 2018;Onoja et al, 2017). For example, the authors' research group reported the use of OPL to produce silica-containing materials, which were then used as precursors in the manufacture of calcium silicate derivatives (Yudha et al, 2020a), ZnO-SiO2, and Zn2SiO4 (Yudha et al, 2020b). Moreover, the decomposition product of OPL was used as a support material for gold particles as catalysts for the reduction of nitroarene compounds (Yudha et al, 2021).…”