Green and Environmentally Sustainable Fabrication of Ag-SnO₂ Nanocomposite and Its Multifunctional Efficacy As Photocatalyst and Antibacterial and Antioxidant Agent

Abstract

Herein, we describe a phytosynthetic, additive-free, economically viable, environmentally sustainable and rapid methodology for the formation of sphere-shaped Ag-SnO2 nanocomposites of 9 nm average particle size employing the stem extracts of Saccharum officinarum. Employing various spectroscopic techniques, the morphology, size, crystallinity, elemental conformation, and functional groups liable for surface stabilization as well as capping were depicted. Considerably, the Ag-SnO2 nanocomposite in aqueous phase revealed excellent removal efficiency for the abatement of four industrially emerging pollutants (Methylene Blue, Rose Bengal, Methyl Violet 6B, and 4-nitrophenol) and probable mechanisms were also suggested. Nearly, 99.1, 99.6, 99.5, and 98.4% of Methylene Blue, Rose Bengal, Methyl Violet 6B, and 4-nitrophenol were eradicated respectively, within 60, 75, 75, and 58.3 min using the synthesized nanocomposite. Moreover, the spent nanocomposites were renewed and their photocatalytic proficiencies were assessed for three consecutive cycles. The spent nanocomposite and the degraded products were respectively analyzed using X-ray diffraction and liquid chromatography-mass spectrometry spectroscopic methods. Additionally, the nanocomposite displayed comparative antimicrobial action against Pseudomonas aeruginosa, Escherichia coli, and Bacillus subtilis and indicated fair activity on 2,2-diphenyl-1-picrylhydrazyl scavenging with IC50 values 0.73 mM depicting its efficient antimicrobial and antioxidant activity. Thus, the present article has disclosed a revolutionary way for fabricating Ag-SnO2 nanocomposites and depicted their multifunctional efficacy as photocatalysts and reducing and prospective antibacterial and antioxidant agents.

Recent Developments in the Plant‐Mediated Green Synthesis of Ag‐Based Nanoparticles for Environmental and Catalytic Applications

“…There are several reports on the synthesis of different Ag‐based nanocatalysts using various plant extracts and their catalytic application in the reduction of nitro compounds and degradation of organic dyes . Some works involving the catalytic activity of biosynthesized Ag nanocatalysts using various plant extracts in nitroarene reduction are summarized in Table .…”

History of Indian Traditional Medicine: A Medical Inheritance.

“…In spite of vital takeoffs from genuine to the goodness of homeopathy, a portion of the discoveries of this examination was, The patients improved in all factors when they took dynamic medications instead of placebo. The investigation demonstrated a huge favor for the homeopathic pharmaceutical [58]. Parallel outcomes in 2004, journal, Rheumatology published individualized double-blind, placebocontrolled, randomized treatment of patients with fibromyalgia in an examination that was supported by the National Centre for Complementary and Alternative Medicine and the National Institutes of Health.…”

Bimetallic Nanoparticles for Antimicrobial Applications

“…The extracts contained sugars, organic acids, and inorganic ions, which helped in the formation of the Ag–SnO 2 nanocomposites. This material displayed antimicrobial action against B. subtilis, E. coli, P. aeruginosa , and Streptococcus pneumoniae (Sinha et al, 2017 ). CeO 2 NPs are generally used for a number of biomedical applications.…”