A5089849534- Nanomaterials for catalytic reactions
- Graphite, nuclear technology, radiation studies
- Radiation Shielding Materials Analysis
- Mesoporous Materials and Catalysis
- Nuclear Physics and Applications
- Nuclear and radioactivity studies
- Catalytic Processes in Materials Science
- Advanced Photocatalysis Techniques
- TiO2 Photocatalysis and Solar Cells
- Blockchain Technology in Education and Learning
- Iron oxide chemistry and applications
- Geotechnical and construction materials studies
- Polymer Nanocomposite Synthesis and Irradiation
- Adsorption and biosorption for pollutant removal
- Geological and Geophysical Studies
- Engineering and Technology Innovations
- Electron and X-Ray Spectroscopy Techniques
- Geophysical and Geoelectrical Methods
- Computer Science and Engineering
- Electromagnetic wave absorption materials
- Extraction and Separation Processes
- Nuclear reactor physics and engineering
- Magnetic Properties and Synthesis of Ferrites
- Graphene and Nanomaterials Applications
- Edcuational Technology Systems
National Nuclear Energy Agency of Indonesia
2013-2025
National Research and Innovation Agency
2023-2025
Nuclear Energy Agency
2012-2023
University of Indonesia
2019-2021
Ministry of Science and Technology Thailand
2017-2019
Riau University
2019
Ministry of Health
2017
Indonesian Institute of Sciences
2015
Abstract Radioactive waste has become a critical concern due to its adverse impacts on the sustainability of living organisms and environment. The is widely generated from various nuclear activities, such as power generation, healthcare, industry, mining, research. Recently, there been an intense focus developing electrochemical techniques for radioactive management these offer several advantages compared other methods, including cleanliness, versatility, environmental friendliness, ease...
Magnetic photocatalysts Fe3O4/SiO2/TiO2 have been prepared using heteroagglomeration method. Synthesis of magnetic photocatalyst was carried out through four stages : (1) synthesis TiO2 nanoparticles by TiCl4 coprecipitation in ammonia solution, (2) Fe3O4 precipitation method a mixture Fe (III) / (II) (2: 1 mole ratio) (3) coating with SiO2 hydrolysis silicate ion, (4) the final stage, Fe3O4/SiO2 mixed hetero-agglomeration manner. Structure and morphology resultan composites investigated...
Fe 3 O 4 /TiO 2 composites were prepared by heteroagglomeration. The of different to TiO weight ratio mixing with in aqueous slurry, under ultrasonic treatment. All samples characterized XRD, VSM, SEM/EDS, raman spectroscopy and BET. contained (anatase rutile) crystal phases. magnetization hysteresis loop for nanocomposites indicated that the hybrid catalyst showed superparamagnetic characteristics at room temperature. Photocatalytic performance was examined its ability degrade methylene...
Magnetite-silica nanocomposites (Fe 3 O 4 /SiO 2 ) have been synthesized and characterized were used as an effective sorbent material for dyes removal from environmental water samples. They prepared by a simple procedure via co precipitation of iron (II) (III) ion mixture in ammonium hydroxide then was impregnated sodium silicate. The samples using Zeta potential, XRD, VSM, TEM, EDS, porosity analysis. result characterization showed that Fe nanoparticles coated silica. composite...
This work studied protective material consisting of several metal oxide composites (Pb3O4, WO3, SnO2, and Bi2O3)-natural rubber (NR) for X-ray gamma-ray shielding. The were prepared through open milling vulcanization processes further characterized by scanning electron microscope (SEM), diffraction (XRD), rheometry analysis, density gauge. attenuation coefficient the sample was investigated using generators with voltages ranging from 50 to 140 kV energies 356 1250 keV, respectively....
Unlike other AFe2O4 ferrite materials, Barium Monoferrite (BaFe2O4) have an orthorhombic structure which is very interesting to further study the crystal and phase formation. In this study, Strontium substituted in form of Ba(1-x)Sr(x)Fe2O4 has successfully been synthesized through solid state reaction method includes BaCO3, SrCO3, Fe2O3 as starting materials. was made by varying dopant composition (Sr2+) from x = 0, 0.1, 0.3, 0.5. Each assisted ethanol continued milling process for 5 hours...
Graphite matrix in Pebble Bed Reactor (PBR) fuel has an important role not only as neutron moderator and structural material to protect nuclear fuel, but also heat transfer media. Therefore, the graphite must meet criteria of physical chemical properties specified for PBR fuel. This paper focuses on purification Indonesian natural by using hydrometallurgy method with acid treatments. The characteristic purified was studied its specification compliance a candidate type High Temperature Gas...
ANALISIS STRUKTUR DAN POROSITAS KOMPOSIT Fe 3 O 4 -KARBON AKTIF DARI LIMBAH KERTAS SEBAGAI ADSORBEN MAGNETIK . Komposit partikel magnet-karbon aktif dari limbah kertas telah berhasil dibuat. Karbon dibuat dengan cara bahan bekas dibakar dan selanjutnya direndam dalam asam kuat. -karbon mencampurkan garam besi 3+ /Fe 2+ (rasio mol 2 : 1) suspensi karbon air. Larutan campuran besi-karbon ditambahkan larutan NaOH tetes demi pada kondisi suhu 70 o C. Analisis struktur, morfologi, ikatan kimia,...
Abstract Iron oxide/titania composites were synthesized by precipitation method. Amount of iron oxide was varied in the composites. The single phase (anatase) obtained for weight ratio 0-20% and three phases (anatase, magnetite hematite) found 30% 40% oxide. crystallite size titania decreased with increasing content. specific surface area, total pore volume BJH sample increased content composite. possessed mesoporous characteristic (6.5-9.6 nm diameter) exhibited ferromagnetic properties....
Graphite material is extremely undissolvable to be turned into chemical solutions, therefore sample preparation a serious problem faced in the determination of elemental impurity content graphite material. In this work, The nondestructive approach instrumental neutron activation analysis (INAA) applied determine concentration multi-element material, by employing both forth floating process and acid treatment method local Indonesian graphite. was irradiated Rabbit system G.A. Sywabessy...
This paper focused on the studying of adsorption properties Fe3O4-waste activated carbon composites for removal methylene blue dyes from water. The various parameters were carried out test composites, namely; contact time, adsorbent dose, initial MB concentration, pH solution, and temperature. isotherm, thermodynamics kinetic was used to determine characteristics onto prepared adsorbent. result indicates that optimum capacity has occurred at = 6 in water solution. increase as temperature...
A photocatalyst supported on magnetic material allows the simple technique by using an external to separate from treated water. Thus, it is a magnetically separable nanoparticles (MSNP). The use of superparamagnetic that do not pose spontaneous moment thus could be dispersed in water and can recollected easily bar. We prepare Fe3O4/SiO2/TiO2 composite hetero agglomeration Fe3O4/SiO2 TiO2 at pH range 3 6.2 aqueous slurry.The was prepared via co-precipitation iron (II) (III) ionic solution...
Adsorption is the most extensively used technique for elimination of dye in contaminant water. Magnetically separation toxic pollutant becoming a potential method water purification and obtained more effective simple compared to conventional treatment. The surface-functionalized magnetic iron oxide nanoparticles with cetyl trimethyl ammonium bromide (CTAB-coated CTAB) has been investigated. CTAB-coated Fe3O4 were synthesized by precipitation ferrous/ferric chloride (mole ratio 2:1)...
ISOLASI DAN KARAKTERISASI MONTMORILLONITE DARI BENTONIT SUKABUMI(INDONESIA). Isolasi montmorillonite dari bentonit lokal tanpa menggunakan bahan kimia telah dilakukan. Proses isolasi meliputi; pelarutan dalam air, pemberian gelombang ultrasonik dan proses sedimentasi secara alami. Endapan yang terbentuk selama selang waktu tertentu dalamproses dikarakterisasi dengan XRD, XRF BET. Endapan: 0menit hingga 15 menit (fraksi 1) endapan - 3 hari 2) adalah fraksi kasar banyak mengandung mineral...
The modification of bentonite by pillarization using aluminum polycation type Keggin [Al13O4(OH)24(H2O)12]7+ has been carried out, exchange cation from interlayer with polycation. amount polycation, which was used for the pillaring varied, i.e. 5 mmol/gram, 10 and 20 mmol/gram bentonite. After drying, pillared calcined at 400 oC 6 hour temperature rate oC/min. cationic capacity (CEC) starting 98.3 meq/100 gram. concentration ratio Al/Si increased 0.27 to 0.34 Ca/Si decreased 0.06 0.006 basal...
ADSORBEN MAGNETIK NANO KOMPOSIT Fe 3 O 4 -KARBON AKTIF UNTUK MENYERAP THORIUM . Penelitian ini dilakukan untuk membuat suatu adsorben magnetik yang akan digunakan menyerap thorium dalam air limbah. Adsorben dibuat dari pencampuran karbon aktif dan larutan garamFe(III)/Fe(II) (rasio molar 2 : 1) ditambahkan NaOH. Padatan dipisahkan dipanaskan pada suhu 100 oC oven selama jam. dikarakterisasi dengan X-Ray Diffractometer (XRD), Vibrating Sample Magnetic (VSM) Brunauer Emmett Teller (BET). Hasil...
The Aluminums (Al) substituted on M-type barium ferrite (BaFe12O19) is one of the magnetic materials, which can be applied to microwave band working at high frequencies. purpose this paper investigate effect Al substitution for Fe3+ ions structure, and absorption behavior ferrite. sample was prepared by mechano-synthesis using high-energy milling (HEM). In research, Fe ion in BaFe12O19 form BaFe12-xAlxO19 x = 0.0,BaFe10Al2O19 2.0 BaFe8Al4O19 4.0 called as BAl-0, BAl-2 BAl-4 sample,...
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Nanocomposite cellulose acetate has been synthesized using organoclay nanofiller modified with TiO2. Tapanuli bentonite was previously subjected to purification and sodium exchangeprocesses, then TiO2,that added as much 0%, 1%, 3%, 5%, 10% weight of the total composite. FTIR analysis showed intercalation Hexadecyl Ammonium Bromide (HDTMABr) surfactant successfully carried out, indicated by new absorption bands at 2636 cm−1 2569 cm−1. XRD diffractogram shows increase in basal spasing on...
A magnetic Fe 3 O 4 /ZnO nanocomposite (NCs) was prepared by a high energy milling (HEM) method. In the present study, ZnO catalyst through two ways. The synthesized coprecipitation method (ZnO (S)), and directly used commercial product (Ald)). NCs were characterized using X-ray diffraction (XRD), vibrating sample magnetometer (VSM), Fourier transform infrared (FTIR), transmission electron microscope (TEM), UV-Vis spectrophotometer. XRD refinement indicates that nanoparticle (NP) is single...
In this study, Titania nanotube (TiNT) had been modified by combining it with carbon (CNT) and magnetic material, Fe3O4, forming magnetically composite (TiNT/CNT/Fe3O4). Magnetic properties were added to the overcome photocatalytic application problem for waste water treatment case, especially catalyst recovery issue. Prior modifications, TiNT was synthesized from TiO2 P25 using hydrothermal process at 130 °C 6 h. CNT then combined hetero agglomeration in acid condition obtain TiNT/CNT...
Abstract The nature of pure CNT has a hydrophobic surface and low dispersion stability. To increase dispersibility, it is necessary to modify the CNT. One possible way electronic vibronic properties charge functional transfer. Addition surfactant solubility in water which produces groups from nanotubes with anionic cationic groups. purpose this study was effect addition on treatment properties. Pure samples that have been added are sonicated for 1 hour then dried. From results X-ray...