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SINTESIS KATALIS MnFe2O4 FOTO-FENTON DENGAN METODE SOL-GEL: EFEK VARIASI KONSENTRASI PREKURSOR KMnO4 DAN SUHU KALSINASI

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Environmental problems related to water pollution have recently attracted the attention of many researchers. One of the main sources of pollution comes from dye-containing wastewater discharged from the textile industry such as methylene blue which is a basic dye widely used in the textile industry. One of the degradation methods that can be used to degrade dye waste is the Photo-Fenton method with the help of an effective catalyst. Manganese ferrite (MnFe2O4) is one of the materials that can be used as a catalyst. This study aims to synthesize manganese ferrite using the sol-gel method through the reaction between KMnO4 which acts as an oxidizer and FeSO4.7H2O as a reductant with a mole ratio of 1: 1 (0.02 mol: 0.02 mol) and a calcination temperature variation of 500°C, 600°C, 700°C and 800°C with a precursor volume variation of KMnO4 at 700°C of 100 mL, 250 mL and 500 mL, with different calcination temperature variations and different concentrations of KMnO4, resulting in different characteristics and catalytic activity. The XRD results show that the concentration and calcination temperature affect the structure, crystal size and crystallinity. Vibrations between Mn-O, Fe-O and Mn-Fe-O can be shown in the results of FTIR characterization at wave numbers 441 cm-1, 552 cm-1 and Mn-Fe-O vibrations at a wavelength of 536 cm-1 which are further reinforced by the results of Raman spectroscopic analysis which shows the vibration of Mn-O, Fe-O and Mn-Fe-O at Raman Shift 520 cm-1-692 cm-1, 140-141 cm-1 and 311-534 cm-1 for catalyst MnFe2O4-700°C-100 mL and MnFe2O4-700°C-500 mL. The analysis process using UV-DRS was also carried out to see the band gap energy of each synthesized catalyst which will be used for the methylene blue dye degradation process, obtained the band gap energy of the MnFe2O4 catalyst at a volume of 100 mL KMnO4 with a calcination temperature of 500°C, 600°C, 700°C, 800°C respectively 3.09 eV, 3.78 eV, 2.89 eV, 3.72 eV and the volume variation of KMnO4 precursor at 700°C 250 mL and 500 mL respectively 3.87 eV, 4.10 eV. Catalytic activity test of the synthesized results in the ability to degrade methylene blue was carried out using MnFe2O4-700°C-100 mL catalyst which has better activity than other synthesized catalysts. With a result of 99.36%, the use of 50 mg catalyst, 30% H2O2 volume as much as 5mL with a concentration of methylene blue of 10 ppm. Based on the results of the study, it was found that the maximum conditions using MnFe2O4-700°C-100 mL catalyst in conditions of 30% H2O2 volume of 5 mL, catalyst mass of 40 mg and initial concentration of 50 ppm methylene blue solution resulted in a percent degradation of 98.18% after a contact time of 120 minutes.

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

1903111336

Penerbit

Pekanbaru : . Universitas Riau – FMIPA – Kimia., 2024

Deskripsi Fisik

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Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

1903111336

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

guntur

Versi lain/terkait

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