b) 2024 - 140 Documents

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Author: search.filters.author.Kshitij RB, Singh

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    INTRODUCTION: NANOBIOTECHNOLOGY FOR FOOD PROCESSING AND PACKAGING (Book Chapter)
    (Elsevier, 2024-01) Arunadevi, Natrajan; Kshitij RB, Singh; Sushma, Thapa; Ajeet Kumar, Kaushik; Jay, Singh; Ravindra, Pratap Singh
    The role of nanobiotechnology in the food industry was found to be an eco-friendly, low-cost, easy synthetic procedure and management method, and helps to reduce the decomposition of food material. Nanoparticles-based food packaging system delivers improved barrier and mechanical characteristics, food preservation, and increased shelf life, thus, attracting both consumers and manufacturers. Hence in this chapter, we presented the role of different nanomaterials in food processing and packaging, its merits, and mitigating the disadvantages of improper handling of these nanocompounds.
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    SILVER NANOPARTICLES BASED FUNCTIONAL MATERIALS FOR ANTI-BACTERIAL AND ANTIVIRAL APPLICATIONS (Book Chapter)
    (American Chemical Society, 2024-06-26) Arunadevi, Natarajan; Kshitij RB, Singh; Pooja, Singh; Jay, Singh; Shyam S, Pandey; Ravindra Pratap, Singh
    Bacterial and viral infections are significant global health issues due to the destructive side effects of prolonged use of resistant drugs. In this regard, there is an imperative need for the progress of stable and effective substitutes to traditional antiviral drugs. Silver particles possess potent anti-bacterial and antiviral properties against several pathogens. Silver nanoparticles are the complete package of remarkable properties like, biocompatible, non-toxic, and user-friendly with excellent physical and chemical properties. In recent decades, scientists paid more attention to research related to developing and applying silver nanoparticle-based functional materials. These materials have broad applications, diagonally from sensors to therapeutic agents. The focus of this chapter is to provide a thorough analysis of silver nanoparticles in a different arena. This chapter also explores silver nanoparticles; synthesis, mechanism, and pharmacological application in wound healing, cardiovascular diseases, etc. Due to inadequate awareness about the dosage of the nanoparticles, the toxicity level was increased, leading to severe environmental impact. So, the challenges to be addressed before the commercialization of silver nanoparticles for therapy were discussed in detail.
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    SYNTHESIS AND ADVANCES OF SMART HETEROATOM-SITED FOR ANTICORROSION APPLICATIONS
    (Taiwan Institute of Chemical Engineers, 2024-07-03) Swathika, M; Sharmila, Chandran; Kshitij RB, Singh; Ravindra Pratap, Singh; Shyam S, Pandey; Arunadevi, Natarajan
    Background: Recently, there has been a significant interest in nanocomposites with porous structure, excellent thermal stability, and stiffness. The corrosion resistance behavior of epoxy resin-based Ni and Co metal oxides nanocomposite is reported here. The anti-corrosion abilities of mild steel substrates were investigated in different media like bore water, soil, and bacteria. Over 120 days, the inhibitory efficiency of the target compound was tested. Methods: The corrosion process was studied under a UV chamber at different wavelengths at 254 nm, 365 nm, and at visible region respectively. The bacterial study was carried out against the gram (+) and gram (-) on the mild steel specimen against Staphylococcus aureus and Escherichia coli. Morphological studies show the effective nanocomposite encapsulation in epoxy resin. The powder XRD method divulges the structure, and the dispersity of the epoxy layer as projected by scanning electron microscopy. Anti-corrosion properties were determined by electrochemical impedance spectroscopy (EIS) and polarization methods. Significant Findings: The results display nano CoO has improved anti-corrosion characteristics compared to nano NiO. The metal nano coating effectively protects mild steel due to barrier properties towards ions responsible for rusting, demonstrating its appropriateness as a next-generation anti-corrosive coating for a sustainable environment.
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    ROLE OF SI AND SIO2 IN OPTOELECTRONIC DEVICE FABRICATION
    (Elsevier B.V, 2024) Harshita, Rai; Kshitij RB, Singh; Shyam S, Pandey; Natarajan, Arunadevi
    Silicon and its oxide deliver a dextrous way for engineering the successors of optoelectronic/photonic devices, by integrating fabrication techniques with heterostructured material possessing tuneable properties. Besides comprehensive knowledge, a collection of functional materials with device fabrication should be amplified. In general, silicon-based allied compounds can co-form with other materials like polymers, nanometal oxides, and organic/inorganic hybrid materials to deliver multiple electronic characteristics. A noteworthy and excellent performance of Si and its oxide secures a prominent position in the realm of the optoelectronics field. This study deliberates an exhaustive overview of advances in fabrication strategies, characteristics, Si/SiO2-based optoelectronic devices, and new materials used in this field. Additionally, this investigation spotlights the potential of Si/SiO2 in accentuating diverse applications like light-emitting diodes, solar cells, photodiodes, and phototransistors. In brief, this article will expose novel pathways of research and peregrination in this mushrooming field.
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    TARGETED ELIMINATION OF HEAVY METALS FROM INDUSTRIAL WASTEWATER: SYNERGISTIC EFFECT OF NANO METAL OXIDES
    (Taiwan Institute of Chemical Engineers, 2024-04-17) Manoharan, Swathika; Narasimhan, Muthulakshmi Andal; Sivasubramaniam, Dharani; Jay, Singh; Shyam S, Pandey; Kshitij RB, Singh; Arunadevi, Natarajan
    Background: Unprocessed solutions containing hazardous heavy metals, even in trace amounts, exert a detrimental impact on human health and pose a threat to biodiversity, hydrosphere ecosystems, and communities. Liquid waste containing heavy metals has been found to pose a notable threat to the environment. Method: In this study, nano NiO, MnO, and NiMnO3 were synthesized and characterized systematically. The nano metal oxides were used as an adsorbent for the elimination of heavy metals from industrial wastewater. Significant Findings: In view of this, the efficacy of synthesized metal oxides as potential sorbents is investigated to chelate Pb (II) ions which are present as one of the major contaminants of industrial effluents. Three adsorption systems viz., Pb(II) – NiO, Pb(II) - MnO, and Pb(II) – NiMnO3 mixture were experimentally verified by Batch equilibration and fixed bed column methods. Pre and post-run sorbent materials are characterized using SEM and EDAX analyses to examine the appropriate changes. A trial fixed bed column was run for the effluent sample, wherein 98% Pb (II) removal was registered against 96 % as observed in Batch mode. This emphasizes the potential of the synthesized metal oxides as efficient sorbents for addressing heavy metal contamination in industrial wastewater.
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    PROLIFERATING OPTOELECTRONIC PROPERTIES OF DOPED ZNO NANOPARTICLES
    (Elsevier, 2024) Sharmila, Chandran; Arthi Priscilla, Ganesan; Nidhi, Asthana; Shyam S, Pandey; Kshitij RB, Singh; Arunadevi, Natarajan
    Ag-doped ZnO nanocomposites were synthesized precisely by adopting a wet chemical method to explore their optoelectronic characteristics for LED applications. Characterization studies have progressed for substantiation of its structural, and functional characteristics in conjugation with the optical properties of nanocomposites before and after doping. The metal-oxygen bonding was affirmed from IR spectra and excitation characteristics were detailed from UV–visible absorption spectra. The SEM images along with Energy dispersive X-ray analysis deliberates hexagonal morphology for pure ZnO which was surprisingly reformed into poly hexagon structures after doping with silver ions. The pertinence of the target material for LED application was verified by performing photoluminescence and charge density measurements. The doping of silver ions into ZnO presents a novel avenue in the field of optronics and serves as appropriate phosphors for light-emitting diodes. The application of the title compound was established by providing nano coating to LED bulb and emission efficiencies was recorded before and after coating. The present research recommends a unique method of nanocoating of LED bulb for efficient light intensity.
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    SYMBIOTIC STUDY OF N-BRIDGED METAL COMPLEXES AS ELECTROCATALYSTS FOR HYDROGEN EVOLUTION REACTION
    (Elsevier, 2024-01-02) Arunadevi, Natarajan; Swathika, M; Kshitij RB, Singh; Ranjana, Verma; Shyam S, Pandey; Jay, Singh
    Design and fabrication of non-noble metal catalysts for the extensive generation of H2 (hydrogen) gas by water splitting is the upsurging field aiming towards the sustainable environment and need the future clean and green energy. However, scheming and understanding the basic principle regulating the activity of the catalyst is still inexplicable. Although Pt is currently the material of choice owing to its high electrocatalytic activities but need for its high loading and high cost is an intriguing issue needing amicable solution. The hybrid structures of heteroatom-based transition metal complexes are more effective and are cost effective electrocatalysts for hydrogen production. In this proposed work, the electrocatalytic behaviour of alkali (Li+, Na+, K+) and alkaline metal (Ca2+, Sr2+, Ba2+) was figured out along with their synthetic procedure and characterization. Owing to their high complexing ability, ring formation, and bidentate nature, substituted naphthoic acid and aminoguanidine were chosen as bridging ligands. The thermodynamic stability and best catalytic behaviour of synthesized alkali and alkaline earth metals were compared and presented based on electrochemical studies. Linear sweep voltammetry (LSV) curves display excellent activity and Tafel slope was found in the range of 6.38–40 mVdec−1 in 0.5 M H2SO4. The electrochemical impedance spectroscopy (EIS) test was accomplished to recognize the mechanism of HER, and charge transfer resistance was less which indicates that composites are favourable for the hydrogen evolution. The electrochemical surface area (ECSA) was figured by studying the electric double layer capacitance (C dl) and it was found to be 0.377 μFcm2 - 0.143 μFcm2. More prominent ECSA values implies, the target complexes have enhanced electrochemically active/dynamic sites and better hydrogen evolution performance. According to the results, high-performing catalytically active sites are found to be Li [1NA-AMG] metal ions, thus showing a potential method for electrocatalyst engineering. Furthermore, in a volcano plot, the position of the Li [1NA-AMG] metal ions is found to be close to the apex with near thermoneutral catalytic activity. Based on the results, we successfully designed an electrocatalyst as a prospective candidate for hydrogen evolution reaction.