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All Journal BERKALA FISIKA Jurnal Penelitian Fisika dan Aplikasinya (JPFA) JITEK (Jurnal Ilmiah Teknosains)
Paramita, Safira Arta
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Agriculture, Biological Sciences & Forestry Astronomy Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Materials Science & Nanotechnology Mechanical Engineering Physics Veterinary

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Structural and Optical Properties of Bismuth-doped Cerium Oxide Prepared at a Low Temperature Paramita, Safira Arta; Nurhasanah, Iis; Khumaeni, Ali
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 13 No. 1 (2023)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v13n1.p16-24

Abstract

Cerium oxide (CeO2) is a functional material with excellent physicochemical properties. Its properties can be modified by doping with different elements, including bismuth, which can be done through various synthesis methods. The precipitation method combined with ultrasonic radiation was used to synthesize bismuth-doped cerium oxide (CeO2:Bi) at a low temperature of 200oC. In this study, we investigate the alteration of structural and optical properties of as-prepared CeO2:Bi by subjecting it to additional calcination at a high temperature of 500oC. The structural and optical properties of CeO2:Bi were characterized using thermal gravimetric analysis, X-ray diffraction, Scanning Electron Microscope-Energy Dispersive X-Ray, Fourier Transform Infrared spectroscopy, and UV-Visible spectroscopy. The additional calcination produced a less significant weight-loss percentage than the as-prepared CeO2:Bi observed from the gravimetric curve. The Fourier transform infrared spectrum revealed the loss of a small number of hydroxyl molecules trapped on the CeO2:Bi surface when additional calcination was subjected. Based on the X-ray diffraction spectra, additional calcination results in the smallest crystallite size and compressive strain without the changed cubic crystal structure of CeO2:Bi. The successful doping of Bi in CeO2 was confirmed by the composition analysis from Energy Dispersive X-Ray measurement. Scanning electron microscope image showed spherical and agglomerated particles of calcined CeO2:Bi. The optical properties of both CeO2:Bi possessed similar trend absorption spectra and almost the same band gap energy. The results indicated that the calcination of as-prepared CeO2:Bi at a temperature of 500oC did not affect its structural and optical properties significantly. Thus, combining ultrasonic radiation with precipitation is an advantageous method to synthesize at a low temperature of stable CeO2:Bi crystalline.
PERKEMBANGAN NANOSAINS DAN NANOTEKNOLOGI: FENOMENA DARI SIFAT FISIKA DAN KIMIA Paramita, Safira Arta; Priyono, Priyono
BERKALA FISIKA Vol 27, No 2 (2024): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

Nanoscience breakthroughs in almost every field of science and nanotechnologies make life easier in this era. Interest in nanomaterials and especially nanoparticles has exploded in the past decades primarily due to their novel or enhanced physicochemical properties compared to bulk material. Nanoscience and nanotechnology represent an expanding research area, which involves structures, devices, and systems with novel properties and functions due to the arrangement of their atoms on the 1–100 nm scale. These extraordinary properties have created a multitude of innovative applications in the fields of medicine and pharma, electronics, agriculture, chemical catalysis, food industry, and many others. We try to provide a comprehensive overview of the different classes of nanoparticles and their novel or enhanced physicochemical properties including mechanical, thermal, magnetic, electronic, optical, and catalytic properties. We hope that this makes the many different methods more accessible to the readers, and to help with identifying the proper methodology for any given nanoscience problem.
MIKROSTRUKTUR SENG OKSIDA YANG DISINTESIS MENGGUNAKAN EKSTRAK DAUN ANTING-ANTING Nurhasanah, Iis; Mukti, Nursanti Ajune; Paramita, Safira Arta
(JITEK)Jurnal Ilmiah Teknosains Vol 9, No 2/Nov (2023): JiTek
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/jitek.v9i2/Nov.17270

Abstract

Cakupan aplikasi yang luas dari seng oksida telah meningkatkan produksi seng oksida menggunakan berbagai metode fisika dan metode kimia. Penggunaan bahan kimia berbahaya dalam produksi seng oksida, mendorong pemanfaatan bahan alam yang ramah lingkungan untuk mereduksi dampak lingkungan.  Penelitian ini bertujuan untuk mensintesis seng oksida dengan memanfaatkan ekstrak daun anting-anting.  Seng oksida disintesis menggunakan proses presipitasi dari campuran larutan seng nitrat dengan ekstrak daun anting-anting.  Produk presipitasi dikalsinasi pada temperatur 500oC selama 3 jam.  Mikrostruktur produk presipitasi dianalisis menggunakan difraksi sinar-x dan scanning electron microscope.  Pola difraksi sinar-x menunjukkan intensitas puncak-puncak difraksi yang tajam dan tinggi mengindikasikan pembentukan material kristalinitas tinggi.  Analisis parameter-parameter struktur menghasilkan nilai yang bersesuaian dengan struktur wurtzite dari seng oksida.  Partikel-partikel berbentuk bulat dengan ukuran 100 nm teramati pada citra electron microscope. Analisis mikrostruktur mengindikasikan bahwa seng oksida kristalin berhasil disintesis. Ekstrak daun anting-anting potensial sebagai bahan alami untuk sintesis oksida logam.
Co-Authors Ali Khumaeni Iis Nurhasanah Mukti, Nursanti Ajune Priyono Priyono