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All Journal Jurnal Natur Indonesia Jurnal Teknik Kimia USU Komunikasi Fisika Indonesia Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Jurnal Pengabdian UntukMu NegeRI ALCHEMY Jurnal Penelitian Kimia IJEBA (International Journal of Economic, Business & Applications) JURNAL PHOTON Acta Biochimica Indonesiana Acta Chimica Asiana Jurnal Inovasi Pendidikan dan Sains Journal of Applied Materials and Technology Jurnal UNITEK Dinamika Lingkungan Indonesia Jurnal Teknik Kimia USU International Journal of Renewable Energy Development al Kimiya : Jurnal Ilmu Kimia dan Terapan
Amir Awaluddin
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Journal : Komunikasi Fisika Indonesia

 1 
PREPARASI NANOPARTIKEL OKSIDA BESI BERBASIS PASIR ALAM LOGAS DIDOPING KOBALT SEBAGAI MATERIAL LINGKUNGAN Erwin Amiruddin; Amir Awaluddin; Muhammad Rizki
Indonesian Physics Communication Vol 20, No 3 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.3.293-300

Abstract

The  cobalt  doped  iron oxide  nanoparticles  have  been  prepared  by  ball  milling  method  using  Logas natural sand as a raw material. The milled iron oxide nanoparticles were doped using cobalt with concentration of 0, 5, 10, 15,  and  20  wt.%.  The  structural, magnetic and  optical properties  were  studied  using  X-ray diffractometer (XRD), vibration sample magnetometer (VSM), and UV-Vis  spectroscopy, respectively. The samples  show  cobalt-hematite  nanoparticles  as  indicated  through  XRD  measurement.  The  XRD measurements  confirmed  the  formation  of  crystalline,  rhombohedral  crystal  structure  and  hematite  nanoparticles.    The  average  crystallite  size calculated using Scherrer formula found to be 38.51, 35.67, 33.75, 32.73, and 31.53 nm after being doped with cobalt 0, 5, 10,  15,  and  20  wt. %,  respectively. The samples  exhibited  weak  ferromagnetic  behaviour  with  the  coercivity  ranged from  124  Oe  to 299  Oe.  The optical properties strongly depend on cobalt  content  and  showed  that  the  band  gaps  of  cobalt  doped  hematite  decrease  with  increasing  cobalt  content.  This work suggests that the prepared iron oxide nanoparticles are attractive photo Fenton catalysts for the degradation of methylene blue in the water.
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.
Co-Authors ', Itnawita ', Padil ', Wahyuni - Hafizhah -, Presetya - . Zulfan Adrianto Ahmad Adrianto Ahmad Afra Juwita Aisyah Fitrida Akmal Muchtar Aman Aman Aman Aman Amilia Linggawati Amiruddin, Erwin Amun Amri Anna Ridha Utami Arif Kurnia Auzar, Auzar Dian Anggraini Edy Saputra Edy Saputra Elis Damayanti Emrizal M. Tamboesai Emrizal Mahidin Tamboesai Endang Maya Sari Erwin Amiruddin Fachran Putra Deraf, Ivano Febrina, Wetri Fitrida, Aisyah Hadilala, Teguh P Hafizhah, - Halida Sophia Hartini Azhar Hasan Yilmas Ilahi, Aulia Nur Irawati Suherman Itnawita Itnawita ' M. Zulfikri Mokhamad Subkhan Monita Olivia Muhammad Rizki Muhdarina Muhdarina Muhdarina Mukhlis Mulyani, Yenni Muras , Yuharmen Nasution, Musyirna Nova Wahyu Pratiwi Nova Wahyu Pratiwi NOVA WAHYU PRATIWI, NOVA WAHYU Novianty, Riryn Nurhayati Nurhayati Nurhayati Pepi Helza Yanti Pepi Helza Yanti Prasetya, Prasetya Prawiranegara, Barata Aditya Presetya - - Rahmondia N. Setiadi Ramadhanti, Aulia Rizki Riska Anggraini Riska Anggraini, Riska Rita Marlina Rosa Murwindra, Rosa Rudi Rahmadi Saryono Saryono Saryono Saryono ' Saryono Saryono Saryono, M.Or. S.Pd. Jas. Setia Utama, Panca Silvera Devi Siregar, Siti Saidah Siregar, Siti Saidah Siregar, Sri Hilma Slamet Wahyuningsih Sri Nelvia Subkhan, Mokhamad Suci Apriani Suci Apriani Suryono Suryono Tengku Abu Hanifah Wahyu Pratiwi , Nova Wisnu Aditya Yilmas, Hasan Yuli Haryani Zuchra Helwani, Zuchra Zulfan Saam Auzar