Biosynthesis of Silver and Gold Nanoparticles Using Aqueous Extract from Crinum latifolium Leaf and Their Applications Forward Antibacterial Effect and Wastewater Treatment

Abstract

Crinum latifolium (CL) leaf is a source of various biologically active compounds such as alkaloid and phenolic compounds, which exhibit anti-inflammatory, antitumor, and antimicrobial effects. In the purpose of expanding applications for the field of bionanotechnology, we report biosynthesis of silver nanoparticles (AgNPs) and gold nanoparticles (AuNPs) by using aqueous extract from C. latifolium leaf and explore antibacterial activity and catalytic performance for degradation of pollutants. The formation of CL-AgNPs and CL-AuNPs is confirmed and optimized by UV-visible spectroscopy with surface plasmon resonance (SPR) peaks at around 402 and 539 nm, respectively. The spherical CL-AgNPs have an average diameter of 20.5 nm and the multishaped CL-AuNPs possess an average size of 17.6 nm. The actions of four bacterial strains were strongly inhibited by using the CL-AgNPs. Furthermore, the biosynthesized metallic nanoparticles (MNPs) exhibited the excellent catalytic degradation performance of pollutants.

Gold Nanoparticles Synthesized Using Extracts of Cyclopia intermedia, Commonly Known as Honeybush, Amplify the Cytotoxic Effects of Doxorubicin

“…The antioxidant activity of HBE as measured by 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging, oxygen radical absorbance capacity (ORAC) and ferric reducing antioxidant power (FRAP) activity was also lower for HBE compared to MGF. Several plant extracts with high reductive capacity have been reported to actively reduce metallic ions, including silver and gold ions, to their corresponding metallic nanoparticles [ 31 , 32 , 33 ]. This reductive capacity can be easily traced to the secondary metabolite content of the plants, which includes polyphenols, flavonoids and steroids.…”

“…The XRD pattern for the two AuNPs revealed five peaks corresponding to standard Bragg’s reflection (111), (200), (220), (311) and (222) of face-centered cubic (fcc) lattice for AuNPs [ 38 ]. The more intense peaks correspond to (111) and (200) planes for HB-AuNPs ( Figure 3 a) and MGF-AuNPs ( Figure 3 b), which indicates the preferential growth of AuNPs at that orientation [ 32 , 39 ].…”

Synthesis of gold nanoparticles using Platycodon grandiflorum extract and its antipathogenic activity under optimal conditions

“…Recently, other researchers have reported the synthesis of Au nanoparticles after 30 min of incubation with various plant extracts. 36,37 Low concentrations of the plant extracts are not favorable for AuNP synthesis due to insufficient availability of biomolecules that are required for the capping and stabilization of the PgAuNPs. The volume of the plant extract plays a crucial role in the synthesis of PgAuNPs.…”

“…Based on previous literature regarding AuNP biosynthesis, 32 approximately 30 mL of HAuCl 4 .3H 2 O (1 mM) solution was mixed with 10 mL of the leaf extract. Next, the mixed solution was incubated at different temperatures (20,37, and 50 C). After incubation, a color change in the reaction mixture was used as an indication of AuNP formation.…”

Green synthesis of silver, iron and gold nanoparticles of lycopene extracted from tomato: their characterization and cytotoxicity against COLO320DM, HT29 and Hella cell

“…Lycopene and NPs showed similar absorption bands, indicating that NPs might be stabilized by Lycopene. On the basis of the orange, yellow and blackish green color of the biomass and the groups suggested by FTIR analysis, it was hypothesized that Lycopene may be involved in gold, silver and iron nanoparticle synthesis [33][34][35].…”