Preparation and characterization of amorphous silica nano (SiO2) based on Lumajang sand using precipitation method for biomaterial composite applications

• Main Authors: Siswanto, Hikmawati, Dyah, Rudyardjo, Djony Izak, Ady, Jan, Ramadhaningtyas, Erica Medina
• Format: Conference Proceeding
• Language: English
• Subjects: Ball milling; Biomedical materials; Degradation; Hydroxyapatite; Leaching; Mechanical alloying; Sand; Silicon dioxide; Sintering; Synthesis
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0110262

Research has been carried out on the synthesis of amorphous silica (SiO2) made from Lumajang sand using the precipitation method. The use of this method is based on its simplicity and can produce large quantities. To increase the synthesis efficiency, nano sand was used, which was processed using high energy milling (HEM) for 15 hours and sintering temperature variations of 500°C, 600°C, 700°C, 800°C, and 900°C. The results showed that the leaching process using 2M HCl could reduce crystal peaks and ball milling for 15 hours using HEM produces a sand particle size of 103.8 nm. From the XRD test of five sintering temperatures, amorphous silica occurs at a temperature of 700°C, while at other temperatures, crystalline silica peaks still appear. This is supported by the degradation test data, which showed that amorphous silica sintered at 700°C had the highest rate. Thus, this amorphous silica has good potential as a hydroxyapatite biomaterial composite preparation which has a weakness in the rate of degradation