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All Journal Jurnal Periodic Jurusan Kimia UNP
Athahirah Athahirah
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology

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Sintesis dan Karakterisasi Zat Warna Kuning Goethite (α-FeOOH) berbahan Pasir Besi Alam Athahirah Athahirah; Syamsi Aini
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 2 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (883.984 KB) | DOI: 10.24036/p.v11i2.113729

Abstract

Goethite yellow dye (α-FeOOH) is an inorganic synthesis product with natural iron sand as the basic material. Pure natural iron sand contains magnetic particles oxidized  to produce Fe3+ ions which can be used as starting materials  for FeOOH compounds. Synthesis was carried out by coprecipitation method with NaHCO3 as coprecipitation agent. The variation of the mass of iron sand is aimed at knowing the optimal comparison of the use of iron sand, H2SO4, and HNO3. The optimum ratio obtained between the mass of iron sand, H2SO4 and HNO3 is 3:10:10. Variations of pH synthesis were carried out at pH 2, 3, 4, 5 and 6 to produce a yellow color with different brightness. The pH causes the yellow color to get darker. The brightest yellow color was obtained at pH 2 synthesis. Characterization was carried out with DRUV-Vis to see the absorption wavelength, FTIR spectrophotometer to see the product's functional groups and XRD to see the crystal structure of the product.
Co-Authors Syamsi Aini