Platanus orientalis Leaf Mediated Rapid Synthesis of Catalytic Gold and Silver Nanoparticles

Shende, Shriya; Joshi, Komal; Kulkarni, Anuja S.; Charolkar, Chaitanya; Shinde, Vaishali; Parihar, Vijay; Kitture, Rohini; Banerjee, Kaushik; Kamble, Narayan; Bellare, Jayesh; Ghosh, Sougata

doi:10.4172/2157-7439.1000494

Cited by 43 publications

(5 citation statements)

References 30 publications

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“…This signifies that LFLE requires lower concentration of AgNO 3 as compared to other phytogenic routes and hence is more economical as well. On the other hand 1 mM and 2 mM of HAuCl 4 were found to be suitable for synthesis of AuNPs which is identical to the synthesis reported using extracts of Litchi chinensis and Platanus orientalis ( Shende et al, 2017 ; Shende et al, 2018 ). It should be noted that reaction time can be remarkably shortened by increasing higher concentration of the metal ions if the quantity of the reducing phytochemicals in plant extract is not sufficiently high.…”

Section: Resultssupporting

confidence: 81%

Leucophyllum frutescens mediated synthesis of silver and gold nanoparticles for catalytic dye degradation

et al. 2022

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The application of nanotechnology is gaining worldwide attention due to attractive physico-chemical and opto-electronic properties of nanoparticles that can be also employed for catalytic dye degradation. This study reports a phytogenic approach for fabrication of silver (AgNPs) and gold nanoparticles (AuNPs) using Leucophyllum frutescens (Berl.) I. M. Johnst (Scrophulariaceae) leaf extract (LFLE). Development of intense dark brown and purple color indicated the synthesis of AgNPs and AuNPs, respectively. Further characterization using UV-visible spectroscopy revealed sharp peak at 460 nm and 540 nm for AgNPs and AuNPs, respectively that were associated to their surface plasmon resonance. High resolution transmission electron microscope (HRTEM) revealed the spherical shape of the AgNPs, whereas anisotropic AuNPs were spherical, triangular and blunt ended hexagons. The majority of the spherical AgNPs and AuNPs were ∼50 ± 15 nm and ∼22 ± 20 nm, respectively. Various reaction parameters such as, metal salt concentration, temperature and concentration of the leaf extract were optimized. Maximum synthesis of AgNPs was obtained when 5 mM for AgNO3 reacted with 10% LFLE for 48 h at 50°C. Likewise, AuNPs synthesis was highest when 2 mM HAuCl4 reacted with 10% LFLE for 5 h at 30°C. Energy dispersive spectroscopy (EDS) showed phase purity of both the nanoparticles and confirmed elemental silver and gold in AgNPs and AuNPs, respectively. The average hydrodynamic particles size of AgNPs was 34.8 nm while AuNPs was 140.8 nm as revealed using dynamic light scattering (DLS) that might be due to agglomeration of smaller nanoparticles into larger clusters. ZETA potential of AgNPs and AuNPs were 0.67 mV and 5.70 mV, respectively. X-ray diffraction (XRD) analysis confirmed the crystallinity of the nanoparticles. Fourier transform infrared spectroscopy (FTIR) confirmed that various functional groups from the phytochemicals present in LFLE played a significant role in reduction and stabilization during the biogenic synthesis of the nanoparticles. The bioreduced AgNPs and AuNPs catalytically degraded Rhodamine B dye (RhB) in presence of UV-light with degradation rate constants of 0.0231 s−1 and 0.00831 s−1, respectively. RhB degradation followed a first order rate kinetics with 23.1 % and 31.7% degradation by AgNPs and AuNPs, respectively.

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Section: Resultssupporting

confidence: 81%

Leucophyllum frutescens mediated synthesis of silver and gold nanoparticles for catalytic dye degradation

et al. 2022

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“…Compared to other reports, the AuNP–film catalyst in this work showed higher catalytic activity for the reduction of 4-NP to 4-AP which was 10 times (0.199 × 10 −2 min −1 ) and 4 times (0.45 × 10 −2 min −1 ) higher than for AuNPs prepared from Gnida glauca leaf and stem extracts [45]. Another report by Shende et al [46–47] demonstrated that AuNPs prepared from Litchi Chinensis peel extract and Platanus Orientalis leaf extract showed 1000 times lower catalytic activity with rate constants of 0.00136 × 10 −2 and 0.00191 × 10 −2 min −1 . Hence, the AuNP–film catalyst in the nanocomposite of this work shows the importance of mesoporous silica as a framework for growing AuNPs in the silicate nanochannels with higher ordered nanostructure.…”

Section: Resultsmentioning

confidence: 52%

Highly ordered mesoporous silica film nanocomposites containing gold nanoparticles for the catalytic reduction of 4-nitrophenol

Jalani

Yuliati

Lee

et al. 2019

Beilstein J. Nanotechnol.

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We report that transparent mesostructured silica/gold nanocomposite materials with an interpore distance of 4.1 nm, as-synthesized from a templated sol–gel synthesis method using discotic trinuclear gold(I) pyrazolate complex, were successfully utilized for the fabrication of thin film mesoporous silica nanocomposites containing gold nanoparticles. The material exhibited a highly ordered hexagonal structure when subjected to a thermal hydrogen reduction treatment at 210 °C. In contrast, when the material was subjected to calcination as a heat treatment from 190 to 450 °C, the thin film nanocomposites showed an intense d 100 X-ray diffraction peak. Moreover, gold nanoparticles inside the thin film nanocomposites were confirmed by the presence of the d 111 diffraction peak at 2θ = 38.2°, a surface plasmon resonance peak between 500–580 nm, and the spherical shape observed in the transmission electron microscope images, as well as the visual change in color from pink to purple. Interestingly, by simply dipping the material into a reaction solution of 4-nitrophenol at room temperature, the highly ordered structure of the as-fabricated silica/gold nanoparticle thin film composite after thermal hydrogen reduction at 210 °C resulted in an improved catalytic activity for the reduction of 4-nitrophenol to 4-aminophenol compared to the material calcined at 250 °C. Such catalytic activity is due to the presence of gold nanoparticles of smaller size in the silicate channels of the highly ordered mesoporous film nanocomposites.

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“…Various physical and chemical biological methods have been employed to synthesize AgNPs with well-defined sizes and shapes. Similarly, the synthesis of biocompatible AgNPs was reported using bacteria, fungi, algae and medicinal plants [72][73][74][75]. Thus, the incorporation of nanostructured silver and their alloys into scaffolds at sub lethal dosages can enhance the shelf life of the material and possibly prevent post-operative pathogenic infections [76,77].…”

Section: Silvermentioning

confidence: 99%

Metallic Nanoscaffolds as Osteogenic Promoters: Advances, Challenges and Scope

Ghosh

Webster

2021

Metals

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Bone injuries and fractures are often associated with post-surgical failures, extended healing times, infection, a lack of return to a normal active lifestyle, and corrosion associated allergies. In this regard, this review presents a comprehensive report on advances in nanotechnology driven solutions for bone tissue engineering. The fabrication of metals such as copper, gold, platinum, palladium, silver, strontium, titanium, zinc oxide, and magnetic nanoparticles with tunable physico-chemical and opto-electronic properties for osteogenic scaffolds is discussed here in detail. Furthermore, the rational selection of a polymeric base such as chitosan, collagen, poly (L-lactide), hydroxyl-propyl-methyl cellulose, poly-lactic-co-glycolic acid, polyglucose-sorbitol-carboxymethy ether, polycaprolactone, natural rubber latex, and silk fibroin for scaffold preparation is also discussed. These advanced materials and fabrication strategies not only provide for appropriate mechanical strength but also render integrity, making them appealing for orthopedic applications. Further, such scaffolds can be functionalized with ligands or biomolecules such as hydroxyapatite, polypyrrole (PPy), magnesium, zinc dopants, and growth factors to stimulate osteogenic differentiation, mineralization, and neovascularization to aid in rapid healing. Future directions to co-incorporate bioceramics, biogenic nanoparticles, and fourth generation biomaterials to enhance biocompatibility, mechanical properties, and rapid recovery are also included in this review. Hence, the further development of such biomimetic metal-based nano-scaffolds at a lower cost with reduced risks and greater efficacy at regrowing bone can revolutionize the future of orthopedics.

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Platanus orientalis Leaf Mediated Rapid Synthesis of Catalytic Gold and Silver Nanoparticles

Cited by 43 publications

References 30 publications

Leucophyllum frutescens mediated synthesis of silver and gold nanoparticles for catalytic dye degradation

Leucophyllum frutescens mediated synthesis of silver and gold nanoparticles for catalytic dye degradation

Highly ordered mesoporous silica film nanocomposites containing gold nanoparticles for the catalytic reduction of 4-nitrophenol

Metallic Nanoscaffolds as Osteogenic Promoters: Advances, Challenges and Scope

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