A review on bio-synthesized Co3O4 nanoparticles using plant extracts and their diverse applications

Abstract

Developing a rapid, reliable and eco-accommodating methodology for the synthesis of metal/metal oxide nanoparticles (NPs) is an important step in the area of nanotechnology. Cobalt oxide nanoparticles (Co3O4 NPs) have been widely studied due to their potential applications including, antibacterial, antifungal, electrochromic sensors, heterogeneous catalysis, and energy storage devices. Due to the large rate of perilous chemicals employed in the physical and chemical production of these NPs, green methods employing the use of plants, fungus, algae, and bacteria have been adopted. However, plant-mediated synthesis of metal NPs has been developed as a substitute to defeat the restrictions of conventional synthesis approaches such as physical and chemical methods. Biomolecules, such as tannins, saponins, proteins, amino acids, steroids, enzymes, flavonoids, and vitamins from several plant extracts have been used as a stabilizing and reducing agents for the synthesis of Co3O4 NPs. Recently, several attempts were made to develop plant-mediated synthesis methods to produce stable, cost-effective, and eco-accommodating Co3O4 NPs. In this review, a comprehensive study was conducted on synthesis, characterization, and various applications of Co3O4 NPs produced using various plant sources.

Biosynthesis, characterization and anthelmintic activity of silver nanoparticles of Clerodendrum infortunatum isolate

“…Bioinspired technology for nanoparticle (NP) synthesis has become a major branch within nanoscience and nanotechnology. So far, numerous metal NPs and metal oxides have been synthesized using plant extracts, microbes, etc 4 , 5 . Due to their wide availability, renewability, and environmental friendliness, in addition to their immense applications in the synthesis of NPs, plant biomass is mostly targeted as a catalyst for chemical synthesis and biodiesel production 6 , 7 .…”

Green adeptness in synthesis of non-toxic copper and cobalt oxide nanocomposites with multifaceted bioactivities

“…In addition, microorganisms, algae, etc. are also used for the green synthesis of nanoparticles (Gu et al 2018;Pagar et al 2019).…”

Green synthesis of cobalt oxide nanoparticles using roots extract of Ziziphus Oxyphylla Edgew its characterization and antibacterial activity

“…Different phytochemicals that are present in plants act as capping, stabilizing, and reducing ends which reduce the agglomeration of Co 3 O 4 -NPs and give these nanoparticles a characteristic feature of controlling the structural morphology and stabilizing the synthesis process of nanoparticles [9]. Plant-based nanoparticles offer several advantages, including being readily accessible, safe to handle, and containing a wide range of biomolecular compounds such as alkaloids, terpenoids, phenols, flavonoids, tannins, and quinines are the compounds that facilitate nanoparticle synthesis [10] [11]. Different plants have been used to extract several types of nanoparticles but none of the research studies has been reported on the green synthesis of cobalt oxide nanoparticles from roots extract of Ziziphus oxyphylla Edgew.Co 3 O 4 -NPs synthesized by the green synthesis method exhibit good antibacterial and antifungal activities.…”