Investigation of Catalytic Potential and Radical Scavenging Efficacy of Terminalia bellerica Roxb Bark Mediated Ecofrien
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ORIGINAL PAPER
Investigation of Catalytic Potential and Radical Scavenging Efficacy of Terminalia bellerica Roxb Bark Mediated Ecofriendly Silver Nanoparticles Lubna Sherin1 • Ayesha Sohail2 • Shahida Shujaat3 • Muhammad Mathar Bashir1 • Sabiqa Inam1 Zareen Arshad3 • Anwar Ul-Hamid4
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Received: 28 January 2020 Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Current study discloses eco-friendly one pot robust method for the synthesis of silver nanoparticles by employing novel bark extract of the medicinal plant Terminalia bellerica Roxb. Synthesized silver nanoparticles (B-AgNPs) were found spherical and crystalline, as confirmed by UV–visible spectroscopy, XRD, TEM and FTIR. Catalytic potential of B-AgNPs was assessed by reductive degradation of various waste water pollutants, such as 4-nitrophenol, methyl orange, methylene blue and eosin yellow that fitted well to pseudo first order kinetics. B-AgNPs were found most efficient towards the reduction of 4-nitrophenol and removed 88.7% of it in 60 min. An artificial neural networks (ANNs) model based on experimental data was developed to describe the nonlinear behavior of the catalytic process that was found most accurate for the reductive degradation of eosin yellow. Antioxidant activity, evaluated by standard DPPH and ABTS assays, was dose dependent and B-AgNPs were found two fold potent in DPPH radical scavenging than the standard used. These results suggest that B-AgNPs could be a sustainable source of technological innovation in wastewater treatment and management of oxidative stress related health disorders. Keywords Silver nanoparticles Terminalia bellerica Waste water pollutants Catalytic reduction Antioxidant activity
Introduction
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10876-020-01865-w) contains supplementary material, which is available to authorized users. & Lubna Sherin [email protected] 1
Department of Chemistry, COMSATS University Islamabad, Lahore, Defence Road, Off Raiwind Road, Lahore 54000, Pakistan
2
Department of Mathematics, COMSATS University Islamabad, Lahore, Defence Road, Off Raiwind Road, Lahore 54000, Pakistan
3
Department of Chemistry, Lahore College for Women University Lahore, Lahore 54000, Pakistan
4
Center for Engineering Research, Research Institute, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
In recent years, anisotropic noble nanostructures, particularly silver nanoparticles, are one of the most explored materials as they display fascinating physiochemical and optoelectronic properties that are totally different from their bulk counterparts. Consequently they have found extensive applications in emerging high tech fields like chemical & biological sensing, bioimaging, light harvesting, catalysis, therapeutics and so on [1–5]. Conventionally they are fabricated by various physical and chemical methods that are either energy or capital intensive
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