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Akhmad Sabarudin
Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Brawijaya
Environmental Science

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Preparation of Chitosan-Fe3O4 Nanoparticles by Ex-Situ Co-Precipitation Using Tripolyphosphate / Sulfate as Crosslinker and Characterization Using XRD Ika Oktavia Wulandari; Akhmad Sabarudin; Djoko Herry Santjojo
Natural B, Journal of Health and Environmental Sciences Vol 3, No 3 (2016)
Publisher : Natural B, Journal of Health and Environmental Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (501.855 KB) | DOI: 10.21776/ub.natural-b.2016.003.03.01

Abstract

Magnetic nanoparticles of Fe3O4 was synthesized in this research by using ex-situ copresipitation method followed by surface modification with crosslinked chitosan along with trypolyphospate (TPP) and sulfate crosslinking agents. The Fe3O4 materials were formed from FeCl2.H2O and FeCl3.6H2O with 1:2 ratio under alkaline condition. Surface modification processes were conducted by mixing chitosan solution with purified Fe3O4 yielding a ferrogel solution as a product. Here, the crosslinker agents, TPP and sulfate, were added to the mixture to make a crosslinking compounds. In these processes, the chitosan-Fe3O4 crystallite size were affected by composition ratio and crosslinking time which will be proven by using x-ray diffraction (XRD) and modified Debye-Scherrer methods. The results showed that, on highest ratios between chitosan and Fe3O4 as well as TPP/sulfate crosslinker, gave the smallest size of crystallite of chitosan-Fe3O4. Furthermore, the more time of crosslinking process caused crystallite size of chitosan-Fe3O4 became much smaller. 
Preparation of Chitosan-Fe3O4 Nanoparticles by In-situ Co-Precipitation Using Tripolyphosphate / Citrate as Crosslinker and Characterization Using XRD Vita Tria Mardila; Akhmad Sabarudin; Djoko Herry Santjojo
Natural B, Journal of Health and Environmental Sciences Vol 3, No 3 (2016)
Publisher : Natural B, Journal of Health and Environmental Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (773.661 KB) | DOI: 10.21776/ub.natural-b.2016.003.03.02

Abstract

Chitosan-Fe3O4 nanoparticles have been synthesized in a one pot reaction by combine TPP: citrate as crosslinker. The method was in-situ co-precipitation of iron salts in the presence of chitosan and crosslinker. The aim of this study was to determine the effect of preparation process towards chitosan-Fe3O4 nanoparticles characteristics which was prepared on several preparation condition: chitosan:Fe(II):Fe(III) ratio, TPP:citrate ratio, and crosslinking time. The crystallite sizes of the Fe3O4 and chitosan- Fe3O4 nanoparticles was obtained from modified Debye Scherrer equation using data from XRD analysis. The crystallite size of the bare-Fe3O4 and chitosan-Fe3O4 nanoparticles were found to be about 6.22 and 9.49 nm, respectively. XRD analysis results shown that beside Fe3O4 phases there was γ-Fe2O3 phase due to the oxidation of Fe3O4.The crystallite sizes and the percentage of Fe3O4 decreases with increasing number of chitosan coating the Fe3O4 and the length of crosslinking time
Co-Authors D. J. Djoko Herry Santjojo Ika Oktavia Wulandari Vita Tria Mardila