Green synthesis of Silver and Gold Nanoparticles for Enhanced catalytic and bactericidal activity
01 Nov 2017-Vol. 263, Iss: 2, pp 022009
TL;DR: In this paper, a rapid one-step green synthetic method using kiwi fruit extract was employed for preparation of silver and gold nanoparticles, which were successfully used as green catalysts for the reduction of 4-nitrophenol (4-NP) and methylene blue (MB).
Abstract: A rapid one step green synthetic method using kiwi fruit extract was employed for preparation of silver and gold nanoparticles. The synthesized nanoparticles were successfully used as green catalysts for the reduction of 4-nitrophenol (4-NP) and methylene blue (MB). They also exhibited excellent antimicrobial activity against clinically isolated Pseudomonas aeruginosa (P.aeruginosa) and Staphylococcus aureus (S.aureus). It was noticed that with increase in concentration of the aqueous silver and gold solutions, particle size of the Ag and Au NPS showed increase as evidenced from UV-Visible spectroscopy and TEM micrograph. The method employed for the synthesis required only a few minutes for more than 90% formation of nanoparticles when the temperature was raised to 80°C. It was also noticed that the catalytic activity of nanoparticles depends upon the size of the particles. These nanoparticles were observed to be crystalline from the clear lattice fringes in the transmission electron microscopic (TEM) images, bright circular spots in the selected area electron diffraction (SAED) pattern and peaks in the X-ray diffraction (XRD) pattern. The Fourier-transform infrared (FTIR) spectrum indicated the presence of different functional groups in the biomolecule capping the nanoparticles.
Citations
More filters
TL;DR: 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.
36 citations
TL;DR: This review focuses on the preparation of (nano)materials and their catalytic and environmental applications and highlights the potential appliances and industrial benefits derived from these low‐cost renewable and sustainable greener sources thus essentially converting waste into wealth.
Abstract: One of the most abundant wastes from all around the world is nutrient resources. Among them, fruits, their extracts, and residues comprise a major portion, which contain many valuable components that get lost during disposal or become burden on the shrinking landfills. These concerns are addressed by seeking sustainable processing methods that would have a minimal environmental impact. The crops contain renewable chemicals which are useful for catalysis, wastewater treatment, or preparation of nanomaterials; there has been an upsurge for the industrial applications of (nano)materials as their environmental and catalytic appliances is a fascinating subject to design cheaper and safer catalytic systems. Due to the excellent chemical properties of the fruit extracts, they have garnered attention as cost-effective catalysts and support materials. This review focuses on the preparation of (nano)materials and their catalytic and environmental applications and highlights the potential appliances and industrial benefits derived from these low-cost renewable and sustainable greener sources thus essentially converting waste into wealth.
19 citations
19 May 2020
TL;DR: In this paper, the authors present a review article to encourage, guide, and facilitate scientific researches in green ruthenium nanochemistry embodying synthesis, characterization and biological as well as catalytic applications.
Abstract: Among transition metals, ruthenium being an in-demand element along with its complexes with multidimensional applications in biology, catalysis (especially photocatalysis), and several other aspects of industrial materials, is lacking regards for the potential aspect of its nanoparticles. In the modern synthetic scenario, green synthesis of novel ruthenium nanoparticles for the development of novel materials with potential applications has become a focus. Ru-containing nanomaterials (Ru-cNMs) combined with metals like platinum and palladium or with non-metals like phosphorus and oxygen have shown applications as an anticancer, antimicrobial, and antioxidant agents along with wide-ranging catalytic applications. Reduction of Ru salts using biomaterials including plants etc. has emerged enabling the synthesis of Ru-cNMs. In this context, authors realize that poor availability of literature in this area of research seems to be one of the major handicaps that perhaps could be limiting its attractiveness to researchers. Therefore, it was thought worthwhile to present a review article to encourage, guide, and facilitate scientific researches in green ruthenium nanochemistry embodying synthesis, characterization and biological as well as catalytic applications.
9 citations
07 Mar 2020
TL;DR: In this article, the potential application of greener synthesized silver and gold nanoparticles in the medical field is explored, and the authors also explore the use of these nanoparticles for point-of-care disease diagnosis.
Abstract: Silver and gold nanoparticles have changed the medical field in various ways. Due to their very small sizes, high surface area, and physical and chemical properties, they have found widespread applications in drug delivery, imaging, diagnosis, and therapeutics. They usually respond significantly to the magnetic field which varies with time, and hence they can transfer enough thermal energy. Their unique physicochemical properties have led to the development of biosensors for point-of-care disease diagnosis. Greener synthesized gold and silver nanoparticles have also revealed anticancer activity toward numerous cancer cells. In this book chapter, we will therefore explore the potential application of greener synthesized silver and gold nanoparticles in the medical field.
3 citations
01 Jan 2022
TL;DR: The most widely used green nanoparticles are metal and metal oxide nanoparticles because they are easier to synthesize and have exceptional properties, stability, and biocompatibility, which makes them suitable for application in biomedical therapeutics, bioimaging and biosensing as discussed by the authors .
Abstract: Recently, green nanotechnology with significant contribution is trending worldwide especially for health specifically in biomedical application due to global sustainable growth of human society. Nanotechnology offers solutions to improve the conventional technologies. Green nanotechnology foresees the achievement of sustainability through various applications. Green synthesized nanoparticle are new environmentally friendly are a novel source of inspiration for clinical research where green approach found to be champion for their sustainable, eco-friendly, reliable, and well-known mechanisms as this method involving natural materials such as plants and plant-derived materials for the synthesis. Green synthesis of nanoparticles using plant extracts is often straightforward, economic, and avoids the use of hazardous chemicals which leads to biologically active shape- and size-dependent products with zero contaminants and by-products. Many investigations have focused on applying green synthesized nanomaterials for biomedical applications, particularly for drug discoveries due to its exceptional properties such as enormous surface area and good biocompatibility. The most widely synthesized nanoparticle materials are metal and metal oxide nanoparticles because they are easier to synthesize and have exceptional properties, stability, and biocompatibility, which makes them suitable for application in biomedical therapeutics, bioimaging, and biosensing. Moreover, these materials have a wide range of applications not limited to anticancer, antibacterial, antimicrobials, antifungal, and antiviral activities. The current trend in the development of green synthesized nanoparticles is increasing exponentially as it is interesting to be studied, especially in the field of health and medical research. Previous reports mainly documented the investigation of the chemical synthesis of metal and metal oxides and very few documents are available for green synthesized nanoparticles of interest in terms of their bioactivities, although green nanomaterials have received worldwide attention lately in biomedical applications. The insufficient information related to green synthesis of nanoparticles and their biomedical impact may be due to unclear and invalidates mechanism or precise good laboratory-based investigation for determination of nanotoxicity and their antiviral activities. So testing the nanotoxicity of prepared green nanoparticles will help in getting a deeper understanding about their relative toxicity and biocompatibility for further application in clinical research. In any development of novel green nanomaterials, extensive research effort is required to accomplish broader risk description. This chapter is focused on the synthesis, characterization, investigation of various properties, and performance of green nanoparticles for biomedical applications. The main goal is to give an overview of synthesized nanoparticles using the green approach, and evaluate their biointerface and nanotoxicity.
1 citations
References
More filters
Book•
01 Jan 1998
TL;DR: Green Chemistry: What is green chemistry? as discussed by the authors presents the principles of green chemistry and evaluates the impact of chemistry on the environment. But, it is not a complete overview of all of the issues involved in green chemistry.
Abstract: 1: Introduction. 2: What is Green Chemistry?. 3: Tools of Green Chemistry. 4: Principles of Green Chemistry. 5: Evaluating the Impacts of Chemistry. 6: Evaluating Feedstocks and Starting Materials. 7: Evaluating Reaction Types. 8: Evaluation of Methods to Design Safer Chemicals. 9: Illustrative Examples. 10: Future Trends in Green Chemistry
5,602 citations
TL;DR: These nontoxic nanomaterials, which can be prepared in a simple and cost-effective manner, may be suitable for the formulation of new types of bactericidal materials.
5,309 citations
TL;DR: The results suggest that Ag nanoparticles can be used as effective growth inhibitors in various microorganisms, making them applicable to diverse medical devices and antimicrobial control systems.
4,319 citations
TL;DR: In the present Communication, a completely "green" synthetic method for producing silver nanoparticles is introduced, by gentle heating of an aqueous starch solution containing silver nitrate and glucose, which produces relatively monodisperse, starchedsilver nanoparticles.
Abstract: In the present Communication, a completely "green" synthetic method for producing silver nanoparticles is introduced. The process is simple, environmentally benign, and quite efficient. By gentle heating of an aqueous starch solution containing silver nitrate and glucose, we produce relatively monodisperse, starched silver nanoparticles. beta-d-Glucose serves as the green reducing agent, while starch serves as the stabilization agent.
2,028 citations
TL;DR: The need to create alternative biodegradable water-soluble polymers for down-the-drain products such as detergents and cosmetics has taken on increasing importance, forcing industry to compete head-to-head on a cost-performance basis with existing familiar products.
Abstract: Biodegradable polymers are designed to degrade upon disposal by the action of living organisms Extraordinary progress has been made in the development of practical processes and products from polymers such as starch, cellulose, and lactic acid The need to create alternative biodegradable water-soluble polymers for down-the-drain products such as detergents and cosmetics has taken on increasing importance Consumers have, however, thus far attached little or no added value to the property of biodegradability, forcing industry to compete head-to-head on a cost-performance basis with existing familiar products In addition, no suitable infrastructure for the disposal of biodegradable materials exists as yet
1,665 citations