1. Synthesis of AgNPs coated with secondary metabolites of Acacia nilotica: An efficient antimicrobial and detoxification agent for environmental toxic organic pollutants.
- Author
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Shah Z, Hassan S, Shaheen K, Khan SA, Gul T, Anwar Y, Al-Shaeri MA, Khan M, Khan R, Haleem MA, and Suo H
- Subjects
- Candida albicans drug effects, Catalysis, Coloring Agents chemistry, Dynamic Light Scattering, Kinetics, Metal Nanoparticles ultrastructure, Methicillin-Resistant Staphylococcus aureus drug effects, Microbial Sensitivity Tests, Nitrogen chemistry, Nitrophenols chemistry, Photoelectron Spectroscopy, Plant Extracts pharmacology, Spectrophotometry, Ultraviolet, Spectroscopy, Fourier Transform Infrared, Static Electricity, Temperature, Thermogravimetry, X-Ray Diffraction, Acacia metabolism, Anti-Infective Agents pharmacology, Environmental Pollutants toxicity, Metal Nanoparticles chemistry, Organic Chemicals toxicity, Secondary Metabolism drug effects, Silver pharmacology
- Abstract
This study concentrates on biosynthesis of Silver Nanoparticles (AgNPs) from stem extract of Acacia nilotica (A. nilotica). The reaction was completed at a temperature ~40-45 °C and time duration of 5 h. AgNPs were thoroughly investigated via advanced characterization techniques such as UV-Vis spectrophotometry (UV-Vis), Fourier Transform Infrared spectroscopy (FTIR), X-ray Diffractometry (XRD), Field Emission Scanning Electron Microscopy (FESEM), High Resolution Transmission Electron Microscopy (HRTEM), X-ray Photoelectron Spectroscopy (XPS), Thermo Gravimetric Analysis (TGA), Diffuse Reflectance Spectroscopy (DRS), Brunner-Emmett-Teller (BET), Dynamic Light Scattering (DLS), and Zeta potential analysis. AgNPs with average size below 50 nm were revealed by all the measuring techniques. Maximum surface area ~5.69 m
2 /g was reported for the as synthesized NPs with total pore volume ~0.0191 mL/g and average pore size ~1.13 nm. Physical properties such as size and shape have changed the surface plasmon resonance peak in UV-visible spectrum. Antimicrobial activity was reported due to denaturation of microbial ribosome's sulphur and phosphorus bond by silver ions against bacterium Methicillin Resistant Staphylococcus aureus (MRSA) and fungus Candida Albican (CA). Furthermore, AgNPs degraded toxic pollutants such as 4-nitrophenol (4-NP), 2-nitrophenol (2-NP) and various hazardous dyes such as Congo Red (CR), Methylene Blue (MB) and Methyl Orange (MO) up to 95%. The present work provided low cost, green and an effective way for synthesis of AgNPs which were utilized as potential antimicrobial agents as well as effective catalyst for detoxification of various pollutants and dyes., Competing Interests: Declaration of competing interest The authors confirm that the content of this research paper has no conflict of interest., (Copyright © 2020 Elsevier B.V. All rights reserved.)- Published
- 2020
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