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All Journal Jurnal Ecosolum Al-Kimia Communications in Science and Technology Indian Journal of Forensic Medicine & Toxicology
Maming
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Agriculture, Biological Sciences & Forestry Chemistry Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Engineering Environmental Science Public Health

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Journal : Communications in Science and Technology

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Synthesis and characterization of hydroxyapatite/SiO2/gelatin composites as bone scaffold candidates Wahda, Indah; Syaharuddin Kasim; Maming; Hasnah Natsir; St Fauziah; Yusafir Hala; Andi Muhammad Anshar; Usman, Andriani; Windasari; Indah Raya
Communications in Science and Technology Vol 9 No 1 (2024)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.9.1.2024.1350

Abstract

This study aims to determine the characteristics of hydroxyapatite/SiO2/gelatin composites to fulfil the bone scaffold standards. XRF analysis showed that limestone has a high CaO content of 92.89%, allowing it be used for hydroxyapatite synthesis. The wet precipitation method was used to synthesize hydroxyapatite; meanwhile, the freeze-drying method was used to synthesize the hydroxyapatite/SiO2/gelatin scaffold. FTIR analysis confirmed the characteristic peaks, which indicated the presence of compounds of hydroxyapatite (OH- and PO43-), SiO2 (Si-OH and Si-O-Si), and gelatin (N-H, C-H, and C=O). XRD analysis showed 98.1% hydroxyapatite phase and 1.9% SiO2 phase and SEM analysis showed a scaffold pore size of 155-218?m, optimal for cell attachment. Furthermore, mechanical testing resulted in a compressive strength of 1.71 MPa and porosity testing resulted in a porosity of 75%. This characterization showed the potential use of hydroxyapatite/SiO2/gelatin composites as bone scaffolds. This research can enable further development of scaffold materials in the field of tissue engineering.
Characterization and electrochemical properties analysis of reduced graphene oxide from corncob carbon as an electrode candidate: Synthesized using modified Hummers method Eka Anggriani Odja; Raya, Indah; Maming; Muhammad Zakir; Abd. Karim; Djabal Nur Basir
Communications in Science and Technology Vol 9 No 1 (2024)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.9.1.2024.1365

Abstract

This research aims to synthesize and characterize reduced graphene oxide (RGO), as well as analyse its electrochemical properties. The synthesis of RGO material from corn cobs went through several stage: carbonization, oxidation and reduction. The synthesis of RGO used a modified Hummer method, and was reduced using the reducing agent ascorbic acid. The synthesized RGO was then characterized using Fourier Transform Independent Spectroscopy (FTIR), X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), and Energy Dispersive Spectroscopy (EDS). Electrochemical analysis using the cyclic voltammetry method, the specific capacitance value obtained showed that RGO had a higher capacitance value than GO. The research results showed that carbon from corn cobs, which has not been utilized optimally, can be synthesized as a basic material for making RGO as a quite promising material.
Co-Authors Abd. Karim AMIR YASSI Andi Muhammad Anshar Anwar Daud Anwar Mallongi Armus, Rakhmad Burhanuddin Bahar Djabal Nur Basir Eka Anggriani Odja Firman, Nur Faiizah Aqiilah Fuad Fathurahman, Achmad Hasnah Natsir Indah Raya Indah Raya Mahatma Lamuru Muhammad Zakir Mukono Permatasari Hasra, Adji Radianti Yahya Douw St Fauziah Syaharuddin Kasim Usman, Andriani Wahda, Indah Windasari YULIATI Yusafir Hala