Aura Gitta Zhafirah, Dika Putra Wijaya, Tafaul Lita Magfirda, Marshya Qurrotul Aini Wibowo, Nilna Inayatan Nafiah, Putri Azzahra, Etika Sholichatus Zahroh, Yoshie Stephanie, Danar Danar
This study aims to synthesize and characterize hydroxyapatite/magnetite (HAp/Fe3 O4) nanocomposites derived from chicken bones as potential materials for bone implants and eco-friendly adsorbents. Synthesis was conducted using the sol-gel method with calcination temperatures varied of 500 °C, 600 °C, and 700 °C. Characterization was performed using XRD, FTIR, SEM-EDX, UV-Vis, and AAS. XRD results showed that at 700 °C, a pure hydroxyapatite phase was formed with the highest crystallinity reaching 96.25% and a crystallite size of 20.14 nm, indicating an increase in the regularity of the crystal structure. FTIR analysis confirmed the presence of typical HAp functional groups (O- H and PO 3-) as well as Fe- O groups from Fe3O4, indicating the successful formation of stable HAp/Fe3O4 magnetic composites at high temperatures. SEM-EDX results showed a porous morphology with particle sizes ranging from 4- 20 nm, while AAS analysis shows a decrease in Ca ion content with increasing temperature, indicating an increase in the efficiency of HAp crystal structure formation. Furthermore, UV-Vis data showed an increase in absorbance at 200 nm with a value of 3.11 and a concentration of 0.816 ppm, indicating higher purity and structural regularity. Overall, the HAp/Fe3O4 nanocomposite at 700 °C has high thermal stability, good crystal structure, and great potential for application as an environmentally friendly biomaterial. © 2026 The Authors, published by EDP Sciences.
Universitas Negeri Malang, Chemistry Department, Malang, 65145, Indonesia
