Pratama Jujur Wibawa, Muhammad Nur, Mukhammad Asy’ari, Wijanarka Wijanarka, Heru Susanto, Heri Sutanto, Hadi Nur
This research aimed to enhance the antibacterial activity of silver nanoparticles (AgNPs) synthesized from silver nitrate (AgNO3) using aloe vera extract. It was performed by means of incor-porating AgNPs on an activated carbon nanoparticle (ACNPs) under ultrasonic agitation (40 kHz, 2 × 50 watt) for 30 min in an aqueous colloidal medium. The successful AgNPs synthesis was clari-fied with both Ultraviolet-Visible (UV-Vis) and Fourier Transform Infrared (FTIR) spectrophotometers. The successful AgNPs–ACNPs incorporation and its particle size analysis was performed using Transmission Electron Microscope (TEM). The brown color suspension generation and UV-Vis’s spectra maximum wavelength at around 480 nm confirmed the existence of AgNPs. The particle sizes of the produced AgNPs were about 5 to 10 nm in the majority number, which collectively surrounded the aloe vera extract secondary metabolites formed core-shell like nanostructure of 8.20 ± 2.05 nm in average size, while ACNPs themselves were about 20.10 ± 1.52 nm in average size formed particles cluster, and 48.00 ± 8.37 nm in average size as stacking of other particles. The antibacterial activity of the synthesized AgNPs and AgNPs-immobilized ACNPs was 57.58% and 63.64%, respectively (for E. coli); 61.25%, and 93.49%, respectively (for S. aureus). In addition, when the AgNPs-immobilized ACNPs material was coated on the cotton and polyester fabrics, the antibacterial activity of the materials changed, becoming 19.23% (cotton; E. coli), 31.73% (polyester; E. coli), 13.36% (cotton; S. aureus), 21.15% (polyester; S. aureus). © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Department of Chemistry, Faculty of Sciences and Mathematics, Diponegoro University, Jalan Prof. H. Soedarto, SH. No.1 Tembalang, Semarang, 50275, Indonesia; Department of Physics, Faculty of Sciences and Mathematics, Diponegoro University, Jalan Prof. H. Soedarto, SH. No.1 Tembalang, Semarang, 50275, Indonesia; Department of Biology, Faculty of Sciences and Mathematics, Diponegoro University, Jalan Prof. H. Soedarto, SH. No.1 Tembalang, Semarang, 50275, Indonesia; Department of Chemical Engineering, Faculty of Enginering, Diponegoro University, Jalan Prof. H. Soedarto, SH. No.1 Tembalang, Semarang, 50275, Indonesia; Center for Sustainable Nanomaterials, Inbu Sina Institute for Scientific and Industrial Research, Universiti Teknologi Malaysia, Skudai, Johor, 81310, Malaysia; Central Laboratory of Minerals and Advanced Materials, Faculty of Mathematica and Natural Sciences, State University of Malang, Malang, 65145, Indonesia
