Title : Photocatalytic and antibacterial activities of green-mediated Khaya senegalensis-silver nanoparticles and oxidized carbon nanotubes
Abstract:
This study investigated the photocatalytic and antibacterial activities of plant-mediated silver nanoparticles (AgNPs) from a medicinal plant extract of Khaya senegalensis (K. senegalensis) and oxygen-functionalized carbon nanotubes (oCNTs), respectively. The CNTs were functionalised using acid treatment. The green synthesised AgNPs from K. senegalensis (KSAgNPs) and oCNTs were characterized by UV–Visible spectroscopy, Fourier transform infrared spectroscopy (FTIR), Transmission emission microscopy (TEM), Scanning electron microscopy (SEM), and X-ray diffraction (XRD). The formation of KS-AgNPs was confirmed by the UV–Vis absorption spectra, which showed an absorption band at 427 nm with a colour change from yellow to brown. The morphology of KS-AgNPs was spherical, with an average particle size of 9.30 nm. The FTIR analyses revealed distinctive functional groups, such as, hydroxyl (O-H), amines (N-H), and carbonyl (C-O), which were directly involved in the synthesis and stability of AgNPs. The XRD spectra was distinctive with five intense peaks at 2θ angles of 38.12°, 44.28°, 64.43°, 77.48°,and 81.54o while oCNTs gave intense peaks at 2θ angles of 26.43o, 42.36o, 44.46o, 54.51o, 59.98o, and 77.40o. The photocatalytic property of green synthesized KS-AgNPs was determined to be 40.7 % higher than that of oCNTs when applied for treatment of industrial wastewater. The ability of green-mediated KS-AgNPs to inhibit gram-positive and gram-negative bacteria was observed to be that gram (-) bacteria (E.coli) was more susceptible to KS-AgNPs than the gram (+) bacteria (S. aureus), in which case their susceptibility was least in oCNTs for both bacteria, respectively.
Audience Take Away Notes:
- The audience will learn about the green synthesis methods used to create Khaya senegalensis-silver nanoparticles and oxidized carbon nanotubes, including the characterization techniques employed
- Insights into the photocatalytic activities of these nanoparticles, including their efficiency in degrading pollutants under light exposure
- Detailed information on the antibacterial properties of the synthesized nanoparticles, including their effectiveness against various bacterial strains
- The knowledge of photocatalytic properties can be used to develop new materials for environmental cleanup, such as water purification
- Insights into antibacterial activities can inform the development of new antimicrobial agents or coatings for medical devices
- Researchers and scientists will gain new methodologies and insights that can enhance their experimental approaches and outcomes
- The synthesis methods, characterization techniques, and applications can serve as valuable teaching material for advanced courses
- Designers of environmental and healthcare solutions can use these nanoparticles to create more efficient and effective products, such as water filters or antimicrobial coatings
- A detailed understanding of the nanoparticles’ properties can lead to more accurate and targeted designs for specific applications
- The new information provided can inspire innovative solutions to existing design problems in the environmental and healthcare fields
- The research promotes sustainability through the use of green synthesis methods, which are more environmentally friendly
- The research potentially reduces the cost of producing nanoparticles by using readily available natural resources
- It contributes to the advancement of nanotechnology and its applications in various fields, fostering interdisciplinary collaboration
