Iranian Journal of Materials Science and Engineering

en Preparation, characterization and Antimicrobial Properties of Ag2O Nanoparticles Composited with Reduced Graphene Oxide گروه کامپوزیت Composites Research Paper Research Paper Researchers have increasingly investigated hybrid nanocomposites that mix physical and chemical properties of carbonaceous materials and metal/metal oxides. In this work, a nanocomposite composed of reduced graphene oxide and silver (I) oxide, rGO@Ag2O, was prepared using ascorbic acid as a green reducing agent. The Ag2O nanoparticles were synthesized by means of a controlled precipitation process in water. The carbonaceous material of rGO was obtained through a modified Hummers' approach. After being combined with a solvent, the Ag2O and rGO in ethanol were dried with heat. The resultant nanocomposite was structurally and optically examined using different characterization techniques.   The results showed that GO has been successfully reduced, Ag2O revealed a crystalline structure, and Ag₂O nanostructures were found on the surface of rGO sheets. Disk diffusion assay was adopted in order to evaluate antibacterial activity of nanocomposite against both Staphylococcus aureus (Gram-positive) and Escherichia coli (Gram-negative) bacteria. The Ag₂O nanostructures in the composite form exhibited inhibition zone with higher diameter compared to their uncomposited counterparts. Higher antibacterial activity of rGO@Ag2O was attributed to the role of negatively charged oxygen-containing groups present on the surface of rGO in slightly improvement in the stability of Ag₂O nanostructures. Our findings show that rGO@Ag₂O could be a useful antimicrobial material for biomedical surfaces, as a coating, and in systems that clean water. It could be a good option for future research in nano-enabled antimicrobial technology because it can destroy bacteria, is made in an environmentally benign way, and could be made on a larger scale.   Nanocomposite,Reduced graphene oxide,Silver (I) oxide,Antibacterial activity 0 0 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-6197-1&slc_lang=en&sid=1 Hawra H. Obeed boshrags@yahoo.com 1800319475328460022095 1800319475328460022095 No Department of Physics, College of Education for Pure Science, University of Kerbala, Karbala, Iraq ali Mejbel M. Alkhafaji ali_mejbel@karbala.edu.iq 1800319475328460022096 1800319475328460022096 No Department of Pharmacy, Alamal College for Specialized Medical Sciences,Karbala, 56001, IraqMinistry of Education, Directorate General of Education in Holy Karbala, Karbala, Iraq Layth Hayder Hameed kazem Al_Tmamimi laith.hamid.ikr14@atu.edu.iq 1800319475328460022097 1800319475328460022097 Yes Al-Furat Al-Awsat Technical University /Polytechnic College-Karbala/Mechanical Technologies Engineering Department Tabarek Falah Deindee sci.tabarek.salim@uobabylon.edu.iq 1800319475328460022098 1800319475328460022098 No Department of Physics, College of Science, University of Babylon, Babylon, Iraq Mohammed Ridha Shaeed Janabi wsci.mohammed.aljanabi@uobabylon.edu.iq 1800319475328460022099 1800319475328460022099 No University of Babylon,Science for women,Laser Physics,Babylon, Iraq