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All Journal POSITRON Jurnal Fisika Unand
Istiqomah, Nurul Imani
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Earth & Planetary Sciences Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

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Application of Eco-Friendly MnFe2O4/TiO2 Nanocomposites for the Photocatalytic Degradation of Methylene Blue Rahardian, Renaldy Baptista; Sari, Emi Kurnia; Istiqomah, Nurul Imani; Suharyadi, Edi; Wibowo, Nur Aji
POSITRON Vol 14, No 2 (2024): Vol. 14 No. 2 Edition
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Univetsitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/positron.v14i2.81999

Abstract

Methylene blue (MB) is a dye commonly utilized in the textile sector. Methylene Blue is an organic compound that readily dissolves in water, facilitating its transport with industrial liquid waste. Due to its non-biodegradable nature, it causes environmental pollution, especially in water sources. The study simulates industrial dye degradation using the green-synthesized MnFe2O4/TiO2 nanocomposites with Moringa Oleifera extract, using varying mass masses for photocatalytic tests. The co-precipitation method was employed to produce magnetic nanoparticles at the nanoscale. X-ray diffraction (XRD) analysis showed a crystalline size of 13.3 nm, while the Fourier Transform Infrared (FTIR) spectroscopy validated the existence of Mn-O, Fe-O, and Ti-O functional groups at wave numbers of 439.1 cm-1, 587.1 cm-1, and 586.8 cm-1, respectively, confirming the successful synthesis of the MnFe2O4/TiO2 nanocomposite. The band gap of the nanocomposite was determined to be 2.9 eV. Using UV light, the photocatalytic process successfully degraded the methylene blue, achieving a 99.9% reduction within 20 minutes, with the optimal mass being 0.02 grams. Additionally, the MnFe2O4/TiO2 nanocomposite demonstrated reusability due to its ease of separation from the reaction solution.
Struktur Kristal dan Sifat Kemagnetan Nanopartikel Mn-Ferrite yang Disintesis dari Bahan Alam Pasir Besi Kiswanto, Heri; Prima Yuniarto, Abdul Hakim; Istiqomah, Nurul Imani; Suharyadi, Edi
Jurnal Fisika Unand Vol 10 No 4 (2021)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.10.4.413-420.2021

Abstract

Nanopartikel Mn-Ferrite berbasis bahan alam pasir besi telah berhasil disintesis dengan metode kopresipitasi. Penelitian ini bertujuan untuk memperoleh nanopartikel Mn-Ferrite dari pasir besi dan menganalisis struktur kristal serta sifat kemagnetannya. Sampel disintesis dengan memvariasikan konsentrasi NaOH yaitu 3 M, 6 M, dan 9 M. Karakterisasi sampel dilakukan dengan X-ray diffractometer (XRD), tunneling electron microscopy (TEM), dan vibration sample magnetometer (VSM). Pola XRD menunjukkan bahwa nanopartikel Mn-ferrite telah berhasil disintesis yang ditandai dengan munculnya puncak difraksi khas spinel ferit. Pola XRD juga mendeteksi beberapa puncak difraksi lain yang diidentifikasi sebagai α-Fe2O3 (hematite). Parameter kisi ditemukan meningkat dari 8,32 hingga 8,38 Å seiring dengan meningkatnya konsentrasi NaOH. Ukuran kristalit diestimasi dengan persamaan Scherrer yang ditemukan antara 20 hingga 26 nm. Hasil TEM menunjukkan sampel mengalami aglomerasi akibat interaksi magnetik serta tingginya tegangan permukaan antar-butir nanopartikel. Kurva histeresis magnetik menunjukan bahwa sampel bersifat soft-magnetic. Magnetisasi saturasi terukur antara 11,2 emu/gram hingga 12,5 emu/gram, sedangkan koersivitas antara 98 Oe hingga 106 Oe. Hal ini dipengaruhi oleh keberadaan fase impuritas yang bersifat anti-ferromagnetik dengan persentase berbeda-beda untuk masing-masing sampel.
Co-Authors Abdul Hakim Prima Yuniarto Edi Suharyadi Heri Kiswanto Nur Aji Wibowo Rahardian, Renaldy Baptista Sari, Emi Kurnia