Article Per Year (5 Year)
p-Index From 2021 - 2026
0.659
P-Index
This Author published in this journals
All Journal POSITRON Jurnal Fisika Unand Jurnal Bio-Geo Material Dan Energi
Istiqomah, Nurul Imani
Unknown Affiliation
Humanities Earth & Planetary Sciences Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
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.
Influence of Mass Variation of Green-Synthesized CoFe2O4/Cdots Catalyst on the Photocatalytic Degradation of Methylene Blue Through Initial Adsorption Mechanism Zalukhu, Aldwin; Deswardani, Frastica; Suharyadi, Edi; Utami, Ranti Widia; Istiqomah, Nurul Imani; Mahardhika, Larrisa Jestha; Azzahro, Siti Fatimah; Altop, Dapfa Farrizo; Oktaviani, Nada
Jurnal Bio-Geo Material Dan Energi Vol. 6 No. 1 (2026): Journal of Bio-Geo Material and Energy (BiGME), February 2026
Publisher : PUI BiGME Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/j-bigme.v6i1.49932

Abstract

This study aimed to synthesize and evaluate the photocatalytic performance of CoFe₂O₄/Cdots nanocomposites prepared via green synthesis method using Moringa oleifera leaf extract and watermelon rind waste as eco-friendly precursors. The synthesis involved a co-precipitation process for CoFe₂O₄ formation and a hydrothermal route to produced Cdots, followed by composite fabrication. The materials were characterized using XRD, UV-Vis Spectrophotometer, and VSM analyses to determine their crystalline structure, optical, and magnetic properties. The results showed that the incorporation of Cdots increased the optical band gap (3.15 eV) compared to pure CoFe₂O₄ (2.64 eV) and improved soft magnetic behavior. Photocatalytic tests under UV irradiation using Methylene Blue as a model pollutant revealed a degradation efficiency of 91.9% for CoFe₂O₄/Cdots at an optimum catalyst mass of 0.07 gr, significantly higher than 60,8% achieved by pure CoFe₂O₄. The enhanced performance is attributed to the synergistic interaction between CoFe₂O₄ and Cdots, which promotes charge separation, initial adsorption, and reactive radical generation. These findings indicate that the CoFe₂O₄/Cdots nanocomposite is a promising eco-friendly photocatalyst for wastewater treatment applications.
Co-Authors Abdul Hakim Prima Yuniarto Altop, Dapfa Farrizo Azzahro, Siti Fatimah Edi Suharyadi Frastica Deswardani Heri Kiswanto Mahardhika, Larrisa Jestha Nur Aji Wibowo Oktaviani, Nada Rahardian, Renaldy Baptista Sari, Emi Kurnia Utami, Ranti Widia Zalukhu, Aldwin