SINTESIS DAN KARAKTERISASI NANOKATALIS Ni0,5Cu0,5Fe2O4 SERTA UJI AKTIVITAS FOTODEGRADASI METANIL YELLOW

FATMA MAHARANI, 1117011019 (2016) SINTESIS DAN KARAKTERISASI NANOKATALIS Ni0,5Cu0,5Fe2O4 SERTA UJI AKTIVITAS FOTODEGRADASI METANIL YELLOW. FAKULTAS MATEMATIKA DAN ILMU PENGETAHUAN ALAM, UNIVERSITAS LAMPUNG.

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Abstrak

Penelitian ini bertujuan untuk membuat nanokatalis Ni0,5Cu0,5Fe2O4 dengan metode sol-gel menggunakan pektin sebagai agen pengemulsi. Katalis kemudian dikalsinasi pada 600 dan 800oC selama tiga jam, dan kemudian dilakukan uji fotodegradasi metanil yellow. Percobaan fotodegradasi dilakukan dengan menggunakan lampu UV dan sinar matahari, dan hasil fotodegradasi diukur absorbansi pada 425 nm menggunakan spektrometer UV-Vis. Hasil penelitian menggunakan katalis yang dikalsinasi pada 600 dan 800oC masing-masing menunjukkan bahwa dengan menggunakan sinar matahari, konsentrasi metanil yellow berkurang sekitar 57 dan 68%, dan sekitar 38 dan 65% menggunakan lampu UV. Karakterisasi menggunakan metode gravimetri menunjukkan bahwa katalis dikalsinasi pada 600oC memiliki keasaman 6,28 mmol piridin/g katalis dan yang dikalsinasi pada 800oC memiliki keasaman 6,04 mmol piridin/g katalis, dengan asam Lewis sebagai situs asam utama seperti yang terlihat pada FTIR. Karakterisasi dengan XRD menunjukkan terbentukknya nanokatalis Ni0,5Cu0,5Fe2O4 dengan adanya NiFe2O4, CuFe2O4, dan fase NiO. Menggunakan persamaan Scherrer diperoleh bahwa ukuran partikel rata-rata nanokatalis dikalsinasi pada 600oC adalah 11,35 nm dan 33,06 nm untuk nanokatalis dikalsinasi pada 800oC. Analisis permukaan katalis yang dikalsinasi pada 600°C menggunakan SEM menunjukkan adanya partikel dengan berbagai ukuran dan bentuk, yang terdistribusi homogen di permukaan. Analisis EDS menunjukkan adanya unsur yaitu 8,67% Ni, 13,11% Cu, 33,86% Fe, dan 33% O, yang sesuai dengan bahan baku yang digunakan. Kata Kunci: Nanokatalis, Pektin, Fotodegradasi, Metanil Yellow ABSTRACT The main purpose of this study is to make Ni0.5Cu0.5Fe2O4 nanocatalysts through sol-gel method using pectin an emulsifying agent. The catalyst was subsequently calcined at 600 and 800 oC for three hours, and then tested for photodegradation of methanyl yellow. Photodegradation experiments was conducted using UV lamp and sunlight, and the degradation performance was evaluated by measuring the absorbance at 425 nm using UV-Vis spectrometer. The experimental results demonstrated that using sunlight, the concentration of the methanyl yellow was reduced around 57 and 68% using the catalyst calcined at 600 and 800 oC, respectively, and around 38 and 65% using UV lamp. Characterization using gravimetric method showed that the catalyst calcined at 600 oC has the acidity of 6.28 mmol pyridine/g catalyst and that calcined at 800 oC has acidity of 6.04 mmol pyridine/g catalyst, with Lewis acid as the main acid site as seen by FTIR. Characterization with XRD technique indicates the presence of NiFe2O4, CuFe2O4, and NiO phase, confirming the formation of Ni0.5Cu0.5Fe2O4. Using Scherrer equation it was obtained that the average particle size of the catalyst calsined at 600 oC is 11.35 nm and 33.06 nm for the catalyst calcined at 800 oC. Surface analysis of the catalyst calcined at 600 °C using SEM showed the existence of particles with different sizes and shapes, homogeneously distributed on the surface. EDS analysis revealed the existence of elements includes 8.67% Ni, 13.11% Cu, 33.86% Fe, and 33% O, which is in accordance with the raw materials used. Keyword: Nanocatalyst, Pectin, Photodegradation, Metanil yellow

Tipe Karya Ilmiah: Skripsi
Subyek: Q Science (General) > QD Chemistry
Program Studi: Fakultas MIPA > Prodi Kimia
Depositing User: 9501354 . Digilib
Date Deposited: 17 Feb 2016 06:47
Last Modified: 17 Feb 2016 06:47
URI: http://digilib.unila.ac.id/id/eprint/21040

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