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All Journal JURNAL KIMIA SAINS DAN APLIKASI
Ali Khumaeni
Department of Physics, Faculty of Sciences and Mathematics, Diponegoro University, Semarang|Diponegoro University|Indonesia
Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering

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The Effect of Microwave Power in the Green Synthesis of Silver Nanoparticles Using Citrus sinensis Peels Extract Tanty Fatikasari; Iis Nurhasanah; Ali Khumaeni
Jurnal Kimia Sains dan Aplikasi Vol 26, No 11 (2023): Volume 26 Issue 11 Year 2023
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.26.11.451-456

Abstract

There are numerous green methods for synthesizing silver nanoparticles using plant extracts such as leaves, flowers, stems, and fruit extracts. However, most of those synthesized have weaknesses such as slow reduction and inefficient time. This study used a microwave to accelerate the reduction process of Ag+ ions into Ag0 nanoparticles using an aqueous extract of Citrus sinensis peels. A heating time of 5 minutes produces silver nanoparticles in optimal condition with a color change from yellow to reddish brown. According to UV-Vis, silver nanoparticles at power 100 W and 300 W show peaks at 404 nm and 406 nm. FTIR indicates that phytochemical compounds are involved in the reduction of nanoparticles. XRD shows silver nanoparticles are FCC crystalline. TEM reveals that power 100 W yields an average diameter of 12 nm while 300 W shows a smaller diameter of 5 nm.
Synthesis and Characterization of Zirconium Dioxide Nanoparticles in Various Liquid Media by Nd:YAG Pulse Laser Ablation and Its Antibacterial Application Dwi Endah Ni’matul Amalia; Iis Nurhasanah; Ali Khumaeni
Jurnal Kimia Sains dan Aplikasi Vol 27, No 10 (2024): Volume 27 Issue 10 Year 2024
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.27.10.464-469

Abstract

The issue of antibiotic resistance by bacteria has been studied to develop a new agent to inhibit bacterial activity. Recent studies have reported on nanoparticles promising antibacterial properties. Zirconium dioxide nanoparticles (ZrO2 NPs) have emerged as potential antibacterial agents for gram-negative bacteria. Nevertheless, there remains a gap in research done on producing stable nanoparticles. Additionally, it studies the impact of the liquid environment in the synthesis to keep a small size. In this present work, ZrO2 NPs have been successfully synthesized in various liquids by pulse laser ablation using the Nd:YAG laser. The laser was ablated on the surface of a zirconium metal plate in different liquid media, such as deionized water, ethylene diamine, and chitosan solution. Furthermore, the liquid media used has an effect on the characteristics of ZrO2 NPs and their antibacterial properties. An investigation of scanning electron microscope images reveals that ZrO2 NPs in deionized water, ethylene diamine, and chitosan solutions have a spherical morphology with diameters measuring around 24.33 nm, 19.76 nm, and 15.05 nm, respectively. The antibacterial effect of ZrO2 NPs in chitosan solution against E. coli bacteria is assessed by measuring the diameter of the inhibition zone (DIZ), which has greater colloidal stability than the other liquid media. The findings indicate that the stability and small size of nanoparticles enhance the ability to inhibit the growth of bacteria.
Co-Authors Dwi Endah Ni’matul Amalia Iis Nurhasanah Tanty Fatikasari