A Review on the Green Synthesis of Silver Oxide Nanoparticles for Photocatalytic Environmental Remediation and Biomedical Applications

Joint Research Collaboration
Sponsor REPA – Research and Education Promotion Association
Grant Number P03EN2201JP03
Grant Year 2022
Principal Investigator (PI) Dr. Danish Mir Sayed Shah
Principal Researcher (PR) Dr. Liezel Estrella-Pajulas
Research Outcome In progress
Contact editorial@repa.jp
Liezel Estrella-Pajulas is an Assistant Professor in Silliman University. She received her MS in Chemistry (2016) and Ph.D. in Physical Chemistry (2019) at Kunsan National University South Korea. While in graduate school her research was centered on the development of metal-free organic dyes for dye-sensitized solar cells (DSSCs) which spans from the computational design of the novel dyes using quantum chemical calculations to the synthesis of the designed dyes subsequently followed by the fabrication and optimization of the solar cell devices. Currently she has added metal oxides nanoparticles (NPs) to her research interests particularly on the development and synthesis of metal oxide NPs for as photocatalyst for sustainable environmental remediation and biomedical applications. She has published several peer-reviewed articles about DSSCs and metal oxide photocatalysts.
A Review on the Green Synthesis of Silver Oxide Nanoparticles for Photocatalytic Environmental Remediation and Biomedical Applications
Purpose and Objective This review article reports the development of silver oxide nanoparticles (Ag2O NPs) fabricated using plant-mediated and microbe-mediated green synthesis. The recent advances in the use of Ag2O NPs as a sustainable photocatalyst for environmental remediation particularly the removal of organic pollutants will be discussed. In addition the biomedical applications of Ag2O NPs will be discussed including antimicrobial and cytotoxic properties.
Significance Metal oxide nanoparticles have been gaining attention because of their unique physical and chemical attributes especially in the field of environmental remediation. Their applications range from their usage for the removal of heavy metals poisonous gas sensing textile biomedical applications and photocatalytic degradation of organic contaminants(Sayed et al. 2021; Nair et al. 2022). The emergence of drug-resistant microorganisms created serious problems in the treatment of infections and other diseases and the need to develop different and effective bactericidal agents in order to deal with drug-resistant bacteria have been a challenge in the scientific community(Allahverdiyev et al. 2011). Metal oxide nanoparticles have been found to have great potential in antimicrobial applications in recent research. In this review article the photocatalytic and biomedical applications of Ag2O NPs fabricated using plant-mediated and microbe-mediated green synthesis are presented.
Research Question Following the growing interest in the use of silver oxide nanoparticles (Ag2O NPs) in many research fields this review article will discuss the green synthesis of silver oxide nanoparticles covering plant-mediated and microbe-mediated fabrication of Ag2O. By this recent studies utilizing various types and parts of plants will be covered presenting their approach of synthesis target organic pollutant and the findings on the antibacterial and cytotoxicity assay. The findings of each mentioned published studies will be briefly discussed including the significant contribution to the field the important methods for the characterization of NPs as well as the future plans and suggestions of the authors in the development of their research design.
Conclusion Up to date several studies have reported the fabrication of Ag2O NPs via plant-mediated and microbe-mediated green synthesis. This method of nanoparticle preparation is known to be cost-effective environment friendly and not hazardous since there is no need to use conventional toxic solvents and reagents. More importantly on the plant-mediated synthesis there are innumerable plants that can be used as the reducing agent in the synthesis of the nanoparticles. Based on the literature the Ag2O NPs prepared using the green synthesis methods show promising photocatalytic properties for the removal of organic compounds. These Ag2O NPs also showed notable antimicrobial and cytotoxic properties.

Allahverdiyev A. M. Abamor E. S. Bagirova M. & Rafailovich M. (2011). Antimicrobial effects of TiO(2) and Ag(2)O nanoparticles against drug-resistant bacteria and leishmania parasites. Future Microbiology 6(8) 933–940. https://doi.org/10.2217/fmb.11.78  

Nair G. M. Sajini T. & Mathew B. (2022). Advanced green approaches for metal and metal oxide nanoparticles synthesis and their environmental applications. In Talanta Open (Vol. 5). Elsevier B.V. https://doi.org/10.1016/j.talo.2021.100080

Sayed M. Danish S. Estrella L. L. Alemaida I. M. A. Lisin A. Moiseev N. Ahmadi M. Nazari M. Wali M. Zaheb H. & Senjyu T. (2021). Photocatalytic Applications of Metal Oxides for Sustainable Environmental Remediation. 1–25.