IMMOBILIZATION OF AIR FILTER MADE OF CHITOSAN STABILIZED SILVER AND ZINC OXIDE NANOPARTICLES AND THE ANTIBACTERIAL PROPERTIES 1Graduate School of Mathematics and Applied Science, Universitas Syiah Kuala, Darussalam Banda Aceh, 23111, Indonesia Abstract An air-contaminated microorganism is being concerned indoors, especially during a disease outbreak- therefore, intensive study on antimicrobial air filters is growing. This study explores the preparation of stabilized and immobilized silver and zinc oxide nanoparticles and their antibacterial properties on simulated bacterial contaminated air. Chitosan stabilized silver nanoparticles (chi-Ag NPs) and chitosan stabilized zinc oxide nanoparticles (chi-ZnO NPs) have successfully prepared with the green chemistry method. Silver ion stabilized with chitosan, reduced with visible light irradiation, and immobilized onto silica gel beads. It has confirmed as nanoparticles in UV-Vis and TEM methods. Silica gel beads coated chi-Ag NPs (SiG chi-Ag NPs) prevented the growth of Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria in agar media. Silver was substituted with zinc oxide nanoparticles to minimize the processing costs. The immobilization of Zn ions and ZnO nanoparticles onto silica gel beads as compatible support has successfully studied and characterized. Silica gel beads coated chi-ZnO NPs (SiG chi-ZnO NPs) exhibited higher bacterial activities against Gram-positive and Gram-negative bacteria than SiG chi-Ag NPs. Keywords: Air filter, Immobilization, Chitosan, Silver nanoparticles, Zinc oxide nanoparticles, Antibacterial Topic: Inorganic Chemistry |
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