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INDONESIA
Jurnal Kimia Terapan Indonesia
Published by Lembaga Ilmu Pengetahuan Indonesia
ISSN : 08532788     EISSN : 25277669     DOI : -
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Materials Science & Nanotechnology
Arjuna Subject : -
Articles 2 Documents
 1 
Search results for , issue "Vol 22, No 1 (2020)" : 2 Documents clear
Synthesis and Characterization of Gold Nanoparticles (AuNPs) by Utilizing Bioactive Compound of Imperata cylndrica L Iwan Syahjoko Saputra; Siti Suhartati; Yoki Yulizar; Sudirman Sudirman
Jurnal Kimia Terapan Indonesia Vol 22, No 1 (2020)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jkti.v22i1.448

Abstract

Gold nanoparticles (AuNPs) have been successfully synthesized using bioactive compounds of Imperata cylindrica L leaf extract. In this study, precursors used HAuCl4 7x10-4 M, 8x10-4 M and 9x10-4 M. Concentration of Imperata cylindrica L used was 5%. The colloid of Gold nanoparticle (AuNPs) formed were characterized using Ultraviolet-visible Spectrophotometer (UV-Vis), Fourier Transform Infrared Spectroscopy (FTIR), Transmission Electron Microscopy (TEM), X-ray Diffraction (XRD). The formation of gold nanoparticles (AuNPs) at concentration 9x10-4 M showed the best results with a color change to red. UV-Vis showed an absorbance value of 1.4 and a wavelength of 530 nm. FTIR analysis showed the interaction of -OH functional group on phenolic compounds of Imperata cylindrica L leaf extract with Au3+ ions. There was a shift on the peak at wavenumber 3414 cm-1 to 3404 cm-1, indicating the formation of Au nanoparticles. TEM analysis showed the morphology of AuNPs is sphere-shaped with a particle size of 20 nm. XRD analysis showed a crystal size average of gold nanoparticles is 12 nm.
Effect of NaCl Electrolyte Concentration on Al2O3 nanoparticle synthesis by electrochemical methods Maria Magdalena Kolo; Fredy Kurniawan
Jurnal Kimia Terapan Indonesia Vol 22, No 1 (2020)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jkti.v22i1.452

Abstract

The Synthesis of Aluminum Oxide Nanoparticles with the electrochemical Method has been investigated. The electrochemical cell consists of a cathode (Al) and anode (Al), then a solution of NaCl as the electrolyte. The variation of the concentration of electrolytes used in this study i.e, 0.1 M; 0.2 M; 0.3 M; 0.4 M and 0.5 M. The reaction was conducted for 15 minutes until the color changes from colorless solution become cloudy. Particle size analysis of alumina nanoparticles using a Zetasizer instrument. The results of particle size analysis of the effect of variations in NaCl solution were used for each concentration of 0.1 M - 0.5 M which is 96.2 nm; 107.4 nm; 120.1 nm; 125.8 nm and 211.0 nm respectively. X-ray Diffraction (XRD) and particle size analysis were used to characterize the structure and size of the product. γ- Al2O3 nanoparticles were obtained by this method. The result showed the alumina nanoparticle size increases with electrolyte concentration

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