Biosynthesis of Metal Nanoparticles and Graphene

Sur, Ujjal Kumar

doi:10.1002/9781119314196.ch6

Cited by 3 publications

(3 citation statements)

References 158 publications

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“…This makes it possible for novel optical characteristics to emerge, and also enhanced electrical and thermal conductivities, lowered melting point, increased magnetism, and other properties can all result from this phenomenon . A variety of plant extracts have been successfully used for the efficient and rapid extracellular synthesis of gold and silver nanoparticles, including geranium (Pelargonium graveolens), lemongrass (Cymbopogon flexuosus), cinnamon (Cinnamomum camphora), neem (Azadirachta indica), aloe vera (Aloe vera), tamarind (Tamarindus indica), and the fruit extract of Emblica officinalis . The production and association of metallic nanoparticles , would benefit from “green chemistry” procedures that are safe, nontoxic, and environmentally acceptable, perhaps utilizing bacteria, fungi, or even plants.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Crystallographic Structures and Properties of Silver Nanoparticles Synthesized Using PKL Extract and Nanoscale Characterization Techniques

et al. 2023

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In this cutting-edge research era, silver nanoparticles impose a substantial impact because of their wide applicability in the field of engineering, science, and industry. Regarding the vast applications of silver nanoparticles, in this study, the crystallographic characteristics and nanostructures of silver nanoparticles extracted from natural resources have been studied. First, biosynthetic silver nanoparticles were synthesized using the Pathor Kuchi leaf (PKL) extract as a mediator, and their crystal structures and characteristics were analyzed by UV–visible absorption spectroscopy, Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), and energy-dispersive X-ray (EDX) analysis. The average crystallite size of the synthesized silver nanoparticle was determined to be 20.26 nm, and also the lattice strain, intrinsic stress, and dislocation density were measured to be 2.19 × 10–3, 0.08235 GPa, and 3.062045 × 10–3/nm2, respectively. Further, the prepared sample of silver nanoparticles shows four peaks in the X-ray diffraction pattern, which correspond to the (111), (200), (220), and (311) face-centered cubic (FCC) crystalline planes. The outstanding finding of this work was that when the lattice parameters of the precursor were increased, the volume of the material did not considerably change, but the particle size decreased. Second, it was clearly demonstrated that this straightforward method is a clean, cost-effective, environmentally sustainable, nontoxic, and efficient route for the synthesis of silver nanoparticles (Ag NPs) using PKL leaf at ambient temperature, which also satisfies the green chemistry requirements. Finally, this study demonstrates the scope for the production of silver nanoparticles using low-cost natural resources.

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Section: Introductionmentioning

confidence: 99%

Analysis of Crystallographic Structures and Properties of Silver Nanoparticles Synthesized Using PKL Extract and Nanoscale Characterization Techniques

et al. 2023

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“…Their findings emphasize the magnetic responsiveness of the nanoparticles, facilitating easy separation after the water treatment processes. Additionally, the study by Sur [ 84 ] investigated the potential of graphene-based nanoparticles in synergy with endophytic microorganisms, showcasing their prowess in pollutant adsorption and subsequent removal from water matrices.…”

Section: The Effect Of Combining Endophytes and Nanoparticles For Wat...mentioning

confidence: 99%

“…The high surface area and reactivity of these nanomaterials make them more efficient in environmental remediation than conventional techniques, marking a significant advancement in the field [ 134 ].Recent studies have delved deeper into the specific applications and mechanisms underlying the success of nanomaterials in water remediation. The multifunctional properties of graphene-based nanoparticles were explored, demonstrating their effectiveness in the simultaneous adsorption and degradation of contaminants in water matrices [ 84 , 106 ]. Additionally, the potential of combining nanoparticles with endophytic microorganisms showcases a synergistic approach for improved water purification [ 129 ].…”

Section: Application Of Endophytes and Nanoparticles In Water Remedia...mentioning

confidence: 99%

Exploring the Potential of Endophytic Microorganisms and Nanoparticles for Enhanced Water Remediation

Manganyi,

Dikobe,

Maseme

2024

Molecules

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Endophytic microorganisms contribute significantly to water bioremediation by enhancing pollutant degradation and supporting aquatic plant health and resilience by releasing bioactive compounds and enzymes. These microorganisms inhabit plant tissues without causing disease or any noticeable symptoms. Endophytes effectively aid in eliminating contaminants from water systems. Nanoparticles serve as potent enhancers in bioremediation processes, augmenting the efficiency of pollutant degradation by increasing surface area and bioavailability, thereby improving the efficacy and rate of remediation. Their controlled nutrient release and ability to stabilize endophytic colonization further contribute to the enhanced and sustainable elimination of contaminated environments. The synergistic effect of endophytes and nanoparticles in water remediation has been widely explored in recent studies, revealing compelling outcomes. Water pollution poses significant threats to human health, ecosystems, and economies; hence, the sixth global goal of the Sustainable Development Agenda 2030 of the United Nations aims to ensure the availability and sustainable management of water resources, recognizing their crucial importance for current and future generations. Conventional methods for addressing water pollution exhibit several limitations, including high costs, energy-intensive processes, the production of hazardous by-products, and insufficient effectiveness in mitigating emerging pollutants such as pharmaceuticals and microplastics. Noticeably, there is an inability to effectively remove various types of pollutants, thus resulting in incomplete purification cycles. Nanoparticle-enhanced water bioremediation offers an innovative, eco-friendly alternative for degrading contaminants. A growing body of research has shown that integrating endophytic microorganisms with nanoparticles for water bioremediation is a potent and viable alternative. This review examines the potential of using endophytic microorganisms and nanoparticles to enhance water remediation, exploring their combined effects and applications in water purification. The paper also provides an overview of synthetic methods for producing endophyte–nanoparticle composites to optimize their remediation capabilities in aqueous environments. The final section of the review highlights the constraints related to integrating endophytes with nanoparticles.

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Influence of Adansonia digitata Stem Extract Immersion Time on Properties of Biosynthesised Silver Nanoparticles

Ezike,

Adamu,

Ike

et al. 2024

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The emergence of the multidisciplinary field of nanoscience with potential applications in medicine, cosmetics, renewable energy, agriculture and environmental remediation has led scientists to search for safer methods of synthesising nanoparticles. We based this study on the synthesis of silver nanoparticles (AgNPs) for varying immersion times of 30, 60, 90, 120 and 150 min, while employing Adansonia digitata as a reducing and capping agent and labelled A, B, C, D and E, respectively. The X-ray diffraction (XRD) pattern of the synthesised AgNPs for all samples have three peaks positioned at 2θ = 37.94°, 44.07° and 64.37° corresponding to (111), (200) and (220) planes, respectively. The samples have a preferred orientation at 2θ = 37.94° corresponding to (111) plane irrespective of the duration of immersion of Adansonia digitata root extracts. The preferred intense peak shows a polycrystalline phase composition of the green synthesised AgNPs, demonstrating the creation of face-centred cubic crystalline of AgNPs. The intrinsic stress, σs, dislocation density, δ, specific surface area, S, crystallite size (D), surface area (S) to volume (V) ratio, lattice parameter, a and atomic packing factor were calculated from XRD data and presented. The particle sizes obtained from the SEM analysis are 69.88, 18.69, 15.45, 19.64 and 20.08 nm for samples A, B, C, D and E, respectively. The optical energy band gaps are 2.37 eV, 2.42 eV, 2.59 eV, 2.52 eV and 2.34 eV for samples A, B, C, D and E respectively. The synthesised AgNPs can be used in energy storage and conversions owing to their properties.

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Biosynthesis of Metal Nanoparticles and Graphene

Cited by 3 publications

References 158 publications

Analysis of Crystallographic Structures and Properties of Silver Nanoparticles Synthesized Using PKL Extract and Nanoscale Characterization Techniques

Analysis of Crystallographic Structures and Properties of Silver Nanoparticles Synthesized Using PKL Extract and Nanoscale Characterization Techniques

Exploring the Potential of Endophytic Microorganisms and Nanoparticles for Enhanced Water Remediation

Influence of Adansonia digitata Stem Extract Immersion Time on Properties of Biosynthesised Silver Nanoparticles

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