Nanokomposit MnFe2O4/NGP dengan variasi 5, 10, dan 15 wt.% digunakan untuksebagai katalis untuk mendegradasi methylene blue pada proses fotokatalitk dansonokatalitik. MnFe2O4 dan MnFe2O4/NGP 5, 10, 15 wt.% disintesis denganmenggunakan metode hydrothermal. Impuritas dan fase lain tidak ditemukan padapengukuran x-ray diffraction (XRD) dan x-ray fluorescence (XRF). KeberadaanNGP terkonfirmasi dari pengukuran XRD, thermogravimetric analysis (TGA),spektroskopi Raman, dan x-ray photoelectron spectroscopy (XPS). Penambahanluas sampel spesifik seiring bertambahnya NGP dikonfirmasi melalui pengukuranBrunauer-Emmet Teller (BET). Morfologi dari MnFe2O4 yang menyerupai persegidan cenderung berkumpul didapat dari pengukuran transmission electronmicroscopy (TEM). Katalis memiliki kemampuan degradasi yang lebih baik padaproses photocatalytic dengan cahaya tampak dibanding cahaya UV. Kondisi sistemterbaik dari katalis untuk mendegradasi methylene blue adalah pada dosis katalis0.2 g/L, konsentrasi H2O2 8 mL, dan pH 13. Penambahan NGP pada MnFe2O4terbukti meningkatkan kemampuan degradasi methylene blue. Katalis juga terbuktimemiliki stabilitas yang tinggi setelah digunakan sebanyak lima kali. Spesies aktifdari katalis pada proses fotokatalitik dan sonokatalitik adalah hidroksil radikal.
MnFe2O4/NGP nanocomposites with variations of 5, 10, and 15 wt.% were used ascatalysts to degrade methylene blue in the photocatalytic and sonocatalyticprocesses. MnFe2O4 and MnFe2O4/NGP 5, 10, 15 wt.% were synthesized using thehydrothermal method. Impurities and other phases were not found in x-raydiffraction (XRD) and x-ray fluorescence (XRF) measurements. The presence ofNGP was confirmed by XRD measurements, thermogravimetric analysis (TGA),Raman spectroscopy, and x-ray photoelectron spectroscopy (XPS). The increase inspecific sample area as NGP increases was confirmed by Brunauer-Emmet Teller(BET) measurements. The morphology of MnFe2O4 which resembles a square andtends to congregate was obtained from transmission electron microscopy (TEM)measurements. The catalyst has better degradation ability in photocatalyticprocesses with visible light than UV light. The best system conditions for thecatalyst to degrade methylene blue were at a catalyst dose of 0.2 g / L, 8 mL H2O2concentration, and a pH of 13. The addition of NGP to MnFe2O4 was proven toincrease the degradation ability of methylene blue. The catalyst has also been shownto have high stability after being used five times. The active species of catalyst inphotocatalytic and sonocatalytic processes are hydroxyl radicals |
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