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All Journal Komunikasi Fisika Indonesia Best Journal (Biology Education, Sains and Technology) Science, Technology, and Communication Journal
Amiruddin, Erwin
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Immunology & microbiology Materials Science & Nanotechnology Physics Public Health

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Preparation and characterization of Cr-TiO2/α-Fe2O3 nanocomposite for methylene blue degradation Hadilala, Teguh P; Amiruddin, Erwin; Awaluddin, Amir; Setiadi, Rahmondia Nanda
Indonesian Physics Communication Vol 21, No 3 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.3.205-210

Abstract

In this study, Cr-TiO2/α-Fe2O3 nanocomposite was prepared by the ball milling method, incorporating chromium, titanium dioxide (TiO2), and iron oxide (α-Fe2O3) nanoparticles extracted from Logas-Kuansing natural sand. The structural, magnetic, morphological, and optical properties of these nanocomposites were investigated using X-ray diffraction (XRD), vibrating sample magnetometer (VSM), scanning electron microscopy (SEM), and UV-Vis spectroscopy. XRD revealed that both the pure and chromium-added nanocomposites have a hexagonal structure, with a crystalline size reduction from 17.5 nm to 19.7, 19.5, and 19.4 nm for the pure and chromium-added samples with chromium concentrations of 0, 5, 10, and 15 wt.%, respectively. Magnetic properties were analyzed through hysteresis loops using VSM, revealing coercivity, saturation magnetization, and remanence magnetization in the ranges of 131 – 247 Oe, 0.80 – 0.54 emu/g, and 0.097 – 0.116 emu/g, respectively. SEM analysis confirmed that the particle shape and size are within the nanometer scale. The optical band gap, estimated using the Tauc relation, decreased from 1.93 eV for the pure nanocomposite to 1.74, 1.68, and 1.72 eV for 5, 10, and 15 wt.% chromium-added nanocomposites, respectively. This study suggests that the prepared Cr-TiO2/α-Fe2O3 nanocomposite exhibits promising physical properties as a catalyst for the degradation of methylene blue.
Decomposition and estimation of gauge transformation for Chern-Simons-Antoniadis-Savvidy forms Hamdan, Suhaivi; Amiruddin, Erwin
Science, Technology and Communication Journal Vol. 2 No. 3 (2022): SINTECHCOM Journal (June 2022)
Publisher : Lembaga Studi Pendidikan and Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v2i3.9

Abstract

Cartan's extended homotopy formula is set to obtain the Chern-Simons-Antoniadis-Savvidy (ChSAS) measurement form transformation. This indicates a change in each of the results that the quasi-invariance nature of the gauge with a closed shape under the meter transformation. The results of the initial calculation of the ChSAS form then show a singlet anomaly for each value of n as a dimension variation. These results have illustrated the relationship with the Chern-Simon form theory. The results of the final calculation of the ChSAS shape on the gauge transformation are then described in relation to the Zumino anomaly which reaches an anomaly variation that depends on the p and n terms.
Schrödinger's equation as a Hamiltonian system Hamdan, Suhaivi; Amiruddin, Erwin
Science, Technology and Communication Journal Vol. 3 No. 1 (2022): SINTECHCOM Journal (October 2022)
Publisher : Lembaga Studi Pendidikan and Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v3i1.221

Abstract

This article describes the concept of the time-dependent Schrödinger equation (TDSE) as a review to add a detailed understanding of the steps to formulate TDSE which can be seen from the classical mechanic's concept as a mechanical wave function. In this article, a comprehensive approach to the concepts of momentum and energy in particles will be described using operators working on wave functions. The results show that the use of momentum and energy operators can show that TDSE is a Hamiltonian system.
Pemanfaatan Sumber Daya Kampung Temusai sebagai Inovasi Lokal Penjernihan Air Menggunakan Penerapan Konsep Kimia Lingkungan dan Ekologi Lingkungan Triyoga, Aseh; Nisa, Sabila Azkia; Ikhlasnisa, Maulidya; Rahima, Silva; Jelita, Syamsuarni; Febriana, Diva; Putri, Charisa Elisya; Fathani, Muhammad Luthfi; Amiruddin, Erwin
BEST Journal (Biology Education, Sains and Technology) Vol 7, No 2 (2024): September 2024
Publisher : Program Studi Pendidikan Biologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/best.v7i2.10221

Abstract

Kampung Temusai berdiri pada tanggal 06 Januari 2010 yang merupakan pemekaran dari tiga dusun sebagai pembentuk Kampung yaitu; Dusun Temutun, Dusun Teluk Musahab, dan Dusun Tuasai. Kampung Temusai terletak di kecamatan Bunga Raya, Kabupaten Siak dengan luas wilayahnya mencapai sekitar 2.351,48 Ha. Masyarakat Temusai awalnya memanfaatkan lahan untuk pertanian, namun beralih ke perkebunan karet dan kelapa sawit. Peralihan ini disebabkan oleh ketergantungan pada curah hujan sebagai satu-satunya sumber irigasi, yang menyebabkan ketidakpuasan karena biaya yang dikeluarkan tidak sebanding dengan hasil yang diperoleh. Potensi perkebunan Temusai memunculkan inovasi penjernihan air, sebagian besar penduduk menggunakan air bor yang berwarna kuning keruh dengan bau besi dan tingkat kesadahan yang cukup tinggi sehingga pada saat menggunakan sabun alhasil busa yang dihasilkan kurang banyak. Tujuan dilakukannya penjernihan air dengan konsep kimia lingkungan dan ekologi lingkungan yaitu untuk dapat meningkatkan kualitas air yang jernih dan tidak berbau. Metode penjernihan air di Kampung Temusai dapat dilakukan dengan menggunakan sumber daya yang ramah lingkungan, seperti; air (sampel), kapas/kain, pasir, batu bata, abu gosok, arang, sabut kelapa/ijuk dan kerikil. Hasil dari pemanfaatan sumber daya Kampung Temusai sebagai inovasi lokal penjernihan air dapat mengedukasi masyarakat dalam memanfaatkan sumber daya yang ramah lingkungan yang dapat diaplikasikan dalam pentingnya melakukan penjernihan air.Kata Kunci: Temusai, Penjernihan, Irigasi, Air, Lingkungan.
Modification of magnetic properties and morphology of iron oxide particles of natural sand from Rokan River through copper doping and preparation using ball milling method Gultom, Elika; Sinuraya, Salomo; Amiruddin, Erwin; Awitdrus, Awitdrus
Indonesian Physics Communication Vol 22, No 1 (2025)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.22.1.35-42

Abstract

The magnetic susceptibility, magnetic properties, morphological properties, and composition of iron oxide nanoparticles of the natural sand in Rokan River, Rokan Hulu Regency, doped copper and prepared by the ball milling method. Processing of the magnetic and non-magnetic particle separation was carried out using iron sand separator (ISS). The ball milling process is ground in two stages for 70 hours and 30 hours and is divided into 3 parts and doped copper with concentrations (weight%) 0 wt%, 5 wt%, and 10 wt%, called BM2A, BM2B, and BM2C products. The calculation of the magnetic susceptibility of the sample is carried out based on the values (BT) and (B0). The resulting magnetic susceptibility decreases as the percentage of copper doping increases. Vibrating sample magnetometer (VSM) shows the magnetic properties of iron oxide particles produced, namely magnetization saturation (MS) decreases, coercivity value (HC) and loop squareness (Mr/MS) grow up, and remanent magnetization (Mr) and loop area (A) varies as doping concentration increases. Morphological properties and composition of iron oxide particles using a scanning electron microscope with energy dispersive X-ray (SEM-EDX). The average measurement of particles produced decreased with the increase in copper doping given, that is 121.960 ± 47.493 nm, 119.730 ± 37.03 nm, and 84.244 ± 34.392 nm. Copper element increased with the increase in doping concentrations given which were 0.76%, 7.11%, and 8.13%, while elements O, Si, and Fe decreased.
The effect of variations in the size of milling balls on the magnetic properties and morphology of natural sand particles in the Rokan River Afriyunita, Dini; Sinuraya, Salomo; Amiruddin, Erwin; Muhammad, Juandi
Indonesian Physics Communication Vol 22, No 1 (2025)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.22.1.43-48

Abstract

Magnetic susceptibility, magnetic properties and morphological properties of natural sand from the Rokan river based on variations in milling ball size. Natural sand samples were put into the iron sand separator for separation between magnetic and non-magnetic particles which were then carried out in a ball milling process for 80 hours using iron balls with a diameter of 1, 2, and 3 cm. The results of the ball milling were then separated using NdFeB magnets, these products are called BM I, BM II, and BM III products. The susceptibility values generated in this study increased with increasing milling ball sizes, for milling ball sizes of 1, 2, and 3 cm the magnetic susceptibility values were 12906.293 × 10-5, 13390.387× 10-5, and 14816.736 × 10-5. The results of the VSM test showed that the saturation magnetization obtained by the BM I, BM II, and BM III products was 2.89, 2.28, and 4.71 emu/g, the remanent magnetization values obtained by 0.45, 0.35, and 0.27 emu/g and the coercivity obtained was 249.07, 263.89, and 275.85 Oe. The results of the SEM-EDX identification showed that Fe increased from 16.24% to 22.68%, while in non-magnetic elements Si decreased from 24.49% to 18.76% with an average particle size getting smaller with increasing size milling ball.
Co-Authors Afriyunita, Dini Amir Awaluddin Awitdrus Awitdrus, Awitdrus Fathani, Muhammad Luthfi Febriana, Diva Gultom, Elika Hadilala, Teguh P Hamdan, Suhaivi Ikhlasnisa, Maulidya Jelita, Syamsuarni Juandi Juandi Nisa, Sabila Azkia Putri, Charisa Elisya Rahima, Silva Rahmondia N. Setiadi Sinuraya, Salomo Triyoga, Aseh