Rapid green synthesis of silver nanoparticles using sulfated polysaccharides originating from Porphyridium cruentum UTEX 161: evaluation of antibacterial and catalytic activities

Green Synthesis of Hexagonal Silver Nanoparticles Using a Novel Microalgae Coelastrella aeroterrestrica Strain BA_Chlo4 and Resulting Anticancer, Antibacterial, and Antioxidant Activities

“…to synthesize Ag/AgCl NPs and revealed that protein and lipids had significant roles in the reduction and stabilization process of NPs [ 50 ]. In addition, Jeon et al extracted sulfated polysaccharides (SP) from Porphyridium cruentum UTEX 161 and utilized it to synthesize Ag-NPs [ 54 ]. FTIR analysis of the resulting SP-Ag-NPs showed eight peaks at 3700, 3400, 2945, 1655, 1420, 1037, 881, and 724 cm −1 , which corresponded to the stretching vibration of O−H in polysaccharide, C=O in amino acid, S=O of the sulfate group, and C−H bending, respectively.…”

“…Husain et al synthesized hexagonal Ag-NPs using Spirulina sp. with a nanosize of 47 nm [ 23 ], while Jeon et al showed that Ag-NPs produced by sulfated polysaccharides extracted from Porphyridium cruentum had a spherical shapes with an average diameter of 26 nm [ 54 ]. In addition, Husain et al biosynthesized Ag-NPs using aqueous extract of Nostoc muscorum NCCU 442 and reported that they were spherical with a nanosize range of 6–45 nm and an average size of 30 nm [ 63 ].…”

“…Rajamanickam et al synthesized Ag-NPs (40–65 nm) using spirulina-associated bacterial extract and studied their antimicrobial activities [ 77 ]; the Ag-NPs had an IZD of 13 and 10 mm against B. subtilis and E. coli , respectively. Jeon et al synthesized Ag-NPs using sulfated polysaccharides extracted from Porphyridium cruentum and screened their biocidal activities against E. coli , B. subtilis , S. aureus , and P. aeruginosa [ 54 ]. The SP-Ag-NPs significantly inhibited the four tested bacteria regardless of the concentration of the NPs; after incubation for 4 h, 99% of bacteria were exterminated by SP-Ag-NPs.…”