Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 24, Issue 21, Pages 17347-17357Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-017-9329-2
Keywords
Green synthesis; Mussaenda glabrata; Metal nanoparticles; Catalysis; Rhodamine B; Methyl orange; 4-nitrophenol; Dye degradation; Water pollution
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Funding
- University Grants Commission (Faculty Development Programme), Government of India
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Plant-derived nanomaterials opened a green approach in solving the current environment issues. Present study focused on rapid microwave-assisted synthesis and applications of gold and silver nanoparticles mediated by aqueous leaf extract of Mussaenda glabrata. The synthesized nanoparticles were characterized by UV-vis, FT-IR, powder XRD, energy-dispersive X-ray spectroscopy (EDX), transmission electron (TEM), and atomic force microscopic techniques (AFM). FCC crystal structure of both nanoparticles was confirmed by peaks corresponding to (111), (200), (220), and (311) planes in XRD spectra and bright circular spots in SAED pattern. IC50 values shown by gold and silver nanoparticles (44.1 +/- 0.82 and 57.92 +/- 1.33 mu g/mL) reflected their high free radical scavenging potential. The synthesized gold and silver nanoparticles revealed their potency to inhibit pathogenic microorganisms Bacillus pumilus, Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli, Aspergillus niger, and Penicillium chrysogenum. Anthropogenic pollutants rhodamine B and methyl orange were effectively degraded from aquatic environment and waste water sewages of dye industries using the prepared nanocatalysts. The catalytic capacities of the synthesized nanoparticles were also exploited in the reduction of 4-nitrophenol.
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