GREEN SINTESIS NANOKOMPOSIT ZnO/CoFe2O4 MENGGUNAKAN EKSTRAK KULIT RAMBUTAN (Nephelium lappaceumL.) DAN SIFAT KATALITIKNYA TERHADAP DEGRADASI ZAT WARNA DAN LIMBAH ZAT WARNA BATIK

AIMI, ALVINA (2017) GREEN SINTESIS NANOKOMPOSIT ZnO/CoFe2O4 MENGGUNAKAN EKSTRAK KULIT RAMBUTAN (Nephelium lappaceumL.) DAN SIFAT KATALITIKNYA TERHADAP DEGRADASI ZAT WARNA DAN LIMBAH ZAT WARNA BATIK. Diploma thesis, UNIVERSITAS ANDALAS.

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Abstract

GREEN SYNTHESIS OF NANOCOMPOSITES OF ZnO/CoFe2O4 USING RAMBUTAN ( Nephelium lappaceumL.) PEEL EXTRACT AND THEIR PHOTOCATALYTIC ON DYE AND BATIK WASTE DYE by Aimi Alvina (1310411076) Dr. Rahmayeni dan Dr. Zulhadjri, M.Eng Magnetic materials of CoFe2O4usingusing rambutan (Nephelium lappaceumL.) peel extract (CoE) and CoFe2O4usingusing rambutan (Nephelium lappaceumL.) peel extract with NaOH (CoEN) and then nanocomposite of ZnO/CoFe2O4 were green synthesized rambutan (Nephelium LappaceumL.) using peel extract as natural ligantion agent followed calcination (NCoEK) and synthesized ZnO/CoFe2O4using rambutan (Nephelium Lappaceum L.) peel extract with NaOH followed calcination (NCoENK) by hidrotermal method. The sample were applied for the degradation Direct Red 81 dye and batik waste dye under solar light irradiation. Nanocomposites were characterized by X-ray Diffraction (XRD), Scanning Electron Microscopy-Energy Dispersive X-ray and Vibrating Sample Magnetometer (VSM) and Fourier Transform Infra-Red (FTIR). The XRD pattern of ZnO/CoFe2O4 nanocomposites showed that the highest peak of ZnO for each nanocomposite corresponding to hexagonal wurtzite structure and the peak CoFe2O4 corresponding to cubic structure. TEM analysis showed that morphology nanocomposite NCoEK granular- like and nanocompositte NCoENK showed hexagonal. The analysis of VSM, nanocomposite NCoEK had weak ferromagnetic properties, but nanocompositesNCoENK had paramagnetic properties. Based on examined results from the degradation of Direct Red 81 dye obtained that ZnO/CoFe2O4 nanocomposites indicates higher photocatalytic activity than ZnO and CoFe2O4 only, reaching 99.64%. ZnO/CoFe2O4 nanocomposite are stable and promise as photocatalysts that can be used again (reusable photocatalyst). Keyword : Magnetic Material ZnO/CoFe2O4, Photocatalyst, Hydrothermal, Direct Red 81, Batik Waste Dye

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