Browsing by Author "Kshitij RB, Singh"

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BIOINSPIRED MULTIFUNCTIONAL SILVER NANOPARTICLES FOR OPTICAL SENSING APPLICATIONS: A SUSTAINABLE APPROACH
(ACS Publications, 2023-10-18) Kshitij RB, Singh; Arunadevi, Natarajan; Shyam S, Pandey
Silver nanoparticles developed via biosynthesis are the most fascinating nanosized particles and encompassed with excellent physicochemical properties. The bioinspired nanoparticles with different shapes and sizes have attracted huge attention due to their stability, low cost, environmental friendliness, and use of less hazardous chemicals. This is an ideal method for synthesizing a range of nanosized metal particles from plants and biomolecules. Optical biosensors are progressively being fabricated for the attainment of sustainability by using opportunities offered by nanotechnology. This review focuses mainly on tuning the optical properties of the metal nanoparticles for optical sensing to explore the importance and applications of bioinspired silver nanoparticles. Further, this review deliberates the role of bioinspired silver nanoparticles (Ag NPs) in biomedical, agricultural, environmental, and energy applications. Profound insight into the antimicrobial properties of these nanoparticles is also appreciated. Tailor-made bioinspired nanoparticles with effectuating characteristics can unsurprisingly target tumor cells and distribute enwrapped payloads intensively. Existing challenges and prospects of bioinspired Ag NPs are also summarized. This review is expected to deliver perceptions about the progress of the next generation of bioinspired Ag NPs and their outstanding performances in various fields by promoting sustainable practices for fabricating optical sensing devices.
BIOINSPIRED MULTIFUNCTIONAL SILVER NANOPARTICLES FOR OPTICAL SENSING APPLICATIONS: A SUSTAINABLE APPROACH
(ACS Publications, 2023-10-18) Kshitij RB, Singh; Arunadevi, Natarajan; Shyam S, Pandey
Silver nanoparticles developed via biosynthesis are the most fascinating nanosized particles and encompassed with excellent physicochemical properties. The bioinspired nanoparticles with different shapes and sizes have attracted huge attention due to their stability, low cost, environmental friendliness, and use of less hazardous chemicals. This is an ideal method for synthesizing a range of nanosized metal particles from plants and biomolecules. Optical biosensors are progressively being fabricated for the attainment of sustainability by using opportunities offered by nanotechnology. This review focuses mainly on tuning the optical properties of the metal nanoparticles for optical sensing to explore the importance and applications of bioinspired silver nanoparticles. Further, this review deliberates the role of bioinspired silver nanoparticles (Ag NPs) in biomedical, agricultural, environmental, and energy applications. Profound insight into the antimicrobial properties of these nanoparticles is also appreciated. Tailor-made bioinspired nanoparticles with effectuating characteristics can unsurprisingly target tumor cells and distribute enwrapped payloads intensively. Existing challenges and prospects of bioinspired Ag NPs are also summarized. This review is expected to deliver perceptions about the progress of the next generation of bioinspired Ag NPs and their outstanding performances in various fields by promoting sustainable practices for fabricating optical sensing devices.
DESIGN AND SYNERGISTIC EFFECT OF NANO-SIZED EPOXY-NICO2O4 NANOCOMPOSITES FOR ANTICORROSION APPLICATIONS
(Royal Society of Chemistry, 2022-05-17) Swathika, M; Kshitij RB, Singh; Mehala, M; Sadanand, Pandey; Jay, Singh; Ravindra, Pratap Singh; Arunadevi, Natarajan
In the present work, we evaluated the corrosion inhibition properties of a ligand and mixed metal oxide nanocomposite. The ligand and mixed nickel–cobalt complex were synthesized using 1-naphthoic acid and aminoguanidine with the formulae [C11H7O2(CN4H5)(CN4H6)]·H2O and {Ni–Co[(CH5N4)2(C11H7O2)2]}·H2O, respectively. After their synthesis, physicochemical techniques such as CHNS analysis, infrared and UV-visible spectroscopy, thermal analysis, and X-ray diffraction (XRD) were employed to characterize both the synthesized ligand and nickel–cobalt complex. The metal oxide prepared from the decomposition of the metal complex was also characterized using several techniques to confirm its bonding and structure. In addition, the corrosion inhibition efficiency of the epoxy-ligand and epoxy-NiCo2O4 nanocomposite on mild steel (MS) in 3 M hydrochloric acid (HCl), 1.5 M sulfuric acid (H2SO4), and 0.5 M phosphoric acid (H3PO4) solution was examined and compared using weight loss measurements, Tafel plots, isotherms and electrochemical impedance spectroscopy (EIS). The results from the electrochemical studies disclosed that the epoxy coating of mixed metal oxides with 0.8 ppm concentration yielded excellent corrosion protection. The SEM images of mild steel and mild steel coated with epoxy-ligand/epoxy-NiCo2O4 in HCl confirmed the anti-corrosive behavior of the synthesized compounds. Hence, the as-prepared material can be a next-generation tool for sustainable anti-corrosive coatings.
DESIGN AND SYNERGISTIC EFFECT OF NANO-SIZED EPOXY-NICO2O4 NANOCOMPOSITES FOR ANTICORROSION APPLICATIONS
(RSC Advances, 2022) Swathika M; Kshitij RB, Singh; Mehala M; Sadanand, Pandey; Jay, Singh; Ravindra, Pratap Singh; Arunadevi, Natarajan
In the present work, we evaluated the corrosion inhibition properties of a ligand and mixed metal oxide nanocomposite. The ligand and mixed nickel–cobalt complex were synthesized using 1-naphthoic acid and aminoguanidine with the formulae [C11H7O2(CN4H5)(CN4H6)]·H2O and {Ni–Co[(CH5N4)2(C11H7O2)2]}·H2O, respectively. After their synthesis, physicochemical techniques such as CHNS analysis, infrared and UV-visible spectroscopy, thermal analysis, and X-ray diffraction (XRD) were employed to characterize both the synthesized ligand and nickel–cobalt complex. The metal oxide prepared from the decomposition of the metal complex was also characterized using several techniques to confirm its bonding and structure. In addition, the corrosion inhibition efficiency of the epoxy-ligand and epoxy-NiCo2O4 nanocomposite on mild steel (MS) in 3 M hydrochloric acid (HCl), 1.5 M sulfuric acid (H2SO4), and 0.5 M phosphoric acid (H3PO4) solution was examined and compared using weight loss measurements, Tafel plots, isotherms and electrochemical impedance spectroscopy (EIS). The results from the electrochemical studies disclosed that the epoxy coating of mixed metal oxides with 0.8 ppm concentration yielded excellent corrosion protection. The SEM images of mild steel and mild steel coated with epoxy-ligand/epoxy-NiCo2O4 in HCl confirmed the anti-corrosive behavior of the synthesized compounds. Hence, the as-prepared material can be a next-generation tool for sustainable anti-corrosive coatings.
GREEN NANOBIOPOLYMERS FOR ECOLOGICAL APPLICATIONS: A STEP TOWARDS A SUSTAINABLE ENVIRONMENT
(Royal Society of Chemistry, 2023-04-20) Preeti, Chincholikar; Kshitij RB, Singh; Arunadevi, Natarajan; Rout George, Kerry; Jay, Singh; Jitendra, Malviya; Ravindra, Pratap Singh
To minimize the usage of non-renewable resources and to maintain a sustainable environment, the exploitation of green nanobiopolymers should be enhanced. Biopolymers are generally developed from various microorganisms and plants in the specified condition. This review article discusses the current advances and trends of biopolymers, particularly in the arena of nanotechnology. In addition, discussion on various synthesis steps and structural characterization of green polymer materials like cellulose, chitin, and lignin is also encompassed. This article aims to coordinate the most recent outputs and possible future utilization of nanobiopolymers to the ecosystem with negligible effects by promoting the utilities of polymeric materials like polycaprolactones, starch, and nanocellulose. Additionally, strategic modification of cellulose into nanocellulose via rearrangement of the polymeric compound to serve various industrial and medical purposes has also been highlighted in the review. Specifically, the process of nanoencapsulation and its advancements in terms of nutritional aspects was also presented. The potential utility of green nanobiopolymers is one of the best cost-effective alternatives concerning circular economy and thereby helps to maintain sustainability.
GREEN NANOBIOPOLYMERS FOR ECOLOGICAL APPLICATIONS: A STEP TOWARDS A SUSTAINABLE ENVIRONMENT
(Royal Society of Chemistry, 2023-04-20) Preeti, Chincholikar; Kshitij RB, Singh; Arunadevi, Natarajan; Rout George, Kerry; Jay, Singh; Jitendra, Malviya; Ravindra, Pratap Singh
To minimize the usage of non-renewable resources and to maintain a sustainable environment, the exploitation of green nanobiopolymers should be enhanced. Biopolymers are generally developed from various microorganisms and plants in the specified condition. This review article discusses the current advances and trends of biopolymers, particularly in the arena of nanotechnology. In addition, discussion on various synthesis steps and structural characterization of green polymer materials like cellulose, chitin, and lignin is also encompassed. This article aims to coordinate the most recent outputs and possible future utilization of nanobiopolymers to the ecosystem with negligible effects by promoting the utilities of polymeric materials like polycaprolactones, starch, and nanocellulose. Additionally, strategic modification of cellulose into nanocellulose via rearrangement of the polymeric compound to serve various industrial and medical purposes has also been highlighted in the review. Specifically, the process of nanoencapsulation and its advancements in terms of nutritional aspects was also presented. The potential utility of green nanobiopolymers is one of the best cost-effective alternatives concerning circular economy and thereby helps to maintain sustainability.
GREEN NANOBIOPOLYMERS FOR ECOLOGICAL APPLICATIONS: A STEP TOWARDS A SUSTAINABLE ENVIRONMENT
(RSC Advances, 2023-04-20) Preeti, Chincholikar; Kshitij RB, Singh; Arunadevi, Natarajan; Rout, George Kerry; Jay, Singh; Jitendra, Malviya; Ravindra, Pratap Singh
To minimize the usage of non-renewable resources and to maintain a sustainable environment, the exploitation of green nanobiopolymers should be enhanced. Biopolymers are generally developed from various microorganisms and plants in the specified condition. This review article discusses the current advances and trends of biopolymers, particularly in the arena of nanotechnology. In addition, discussion on various synthesis steps and structural characterization of green polymer materials like cellulose, chitin, and lignin is also encompassed. This article aims to coordinate the most recent outputs and possible future utilization of nanobiopolymers to the ecosystem with negligible effects by promoting the utilities of polymeric materials like polycaprolactones, starch, and nanocellulose. Additionally, strategic modification of cellulose into nanocellulose via rearrangement of the polymeric compound to serve various industrial and medical purposes has also been highlighted in the review. Specifically, the process of nanoencapsulation and its advancements in terms of nutritional aspects was also presented. The potential utility of green nanobiopolymers is one of the best cost-effective alternatives concerning circular economy and thereby helps to maintain sustainability.
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.
POTENTIALITIES OF FLUORESCENT CARBON NANOMATERIALS AS SENSOR FOR FOOD ANALYSIS
(Wiley Analytical Science, 2023) Piyali, Sabui; Sadhucharan, Mallick; Kshitij RB, Singh; Arunadevi, Natarajan; Ranjana, Verma; Jay, Singh; Ravindra, Pratap Singh
Food safety and quality are among the most significant and prevalent research areas worldwide. The fabrication of appropriate technical procedures or devices for the recognition of hazardous features in foods is essential to safeguard food materials. In the recent era, developing high-performance sensors based on carbon nanomaterial for food safety investigation has made noteworthy progress. Hence this review briefly highlights the different detection approaches (colorimetric sensor, fluorescence sensor, surface-enhanced Raman scattering, surface plasmon resonance, chemiluminescence, and electroluminescence), functional carbon nanomaterials with various dimensions (quantum dots, graphene quantum dots) and detection mechanisms. Further, this review emphasizes the assimilation of carbon nanomaterials with optical sensors to identify multiple contaminants in food products. The insights of carbon-based nanomaterials optical sensors for pesticides and insecticides, toxic metals, antibiotics, microorganisms, and mycotoxins detection are described in detail. Finally, the opportunities and future perspectives of nanomaterials-based optical analytical approaches for detecting various food contaminants are discussed.
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.
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.
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.
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.
SYMBIOTIC STUDY OF N-BRIDGED METAL COMPLEXES AS ELECTROCATALYSTS FOR HYDROGEN EVOLUTION REACTION
(Elsevier, 2023-08-14) 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.