Demystifying the morphology and size control on the biosynthesis of gold nanoparticles using Eucalyptus globulus bark extract

Pinto, Ricardo J.B.; Lucas, José M.F.; Morais, Madalena P.; Santos, Sónia A.O.; Silvestre, Armando J. D.; Marques, Paula A.A.P.; Freire, Carmen S.R.

doi:10.1016/j.indcrop.2017.05.003

Cited by 37 publications

(21 citation statements)

References 49 publications

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“…In addition the appearance of a sharp SPR band at a relatively wavelength (524 nm) for colloid (S) compared to the colloid (L) (536 nm) (Figure 3), suggest the formation of ultasmall nanoparticles in the alkaline medium. The bathochromic shift of the SPR band from 524 nm towards wavelength at 536 nm, in acidic medium indicating the presence of larger sized nanoparticles (38,39). Our results also suggest that a pH ∼11 is the most favorable for bio-synthesis of AuNPs using 8 g.L −1 of polyphenol.…”

Section: Effect Of Phsupporting

confidence: 55%

Synthesis of ultra-small gold nanoparticles by polyphenol extracted from Salvia officinalis and efficiency for catalytic reduction of p-nitrophenol and methylene blue

Oueslati

Tahar

Harrath

2020

Green Chemistry Letters and Reviews

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The present research work reports an eco-friendly route for preparing gold nanoparticles (AuNPs) with high catalytic activity using polyphenol extracted from salvia officinalis. In both alkaline (pH ∼ 11) and acidic media (pH ∼ 5), the polyphenol induced rapid reduction of the Au (III) salt and lead to the formation of highly monodisperse and spherical small (S) and larger (L) AuNPs, respectively. The average particle size was found to be ∼ 6 nm for S and ∼ 27 nm for L AuNPs, respectively. FT-IR revealed that polyphenol species are capped onto the nanoparticles surface favorizing a high aqueous colloidal stability of the AuNPs in a wide pH range. In addition, the produced AuNPs exhibited significant size-dependent degradation rate of p-nitrophenol (p-NP) and methylene blue (MB) to p-aminophenol (p-AP) and leucomethylene blue (LMB), respectively.

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Section: Effect Of Phsupporting

confidence: 55%

Synthesis of ultra-small gold nanoparticles by polyphenol extracted from Salvia officinalis and efficiency for catalytic reduction of p-nitrophenol and methylene blue

Oueslati

Tahar

Harrath

2020

Green Chemistry Letters and Reviews

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“…A few years later, scientist’s attention emerged regarding this plant due to its efficiency in producing MNPs. Thus far, several Eucalyptus species have been adopted to produce MNPs such as E. chapmaniana [ 32 ], E. globulus [ 25 , 26 , 79 , 83 , 84 , 85 , 86 ], E. leucoxylon [ 87 ], E. oleosa [ 88 , 89 ], E. camaldulensis [ 90 , 91 ], E. robusta [ 51 ], and E. tereticornis [ 92 ].…”

Section: Synthesis Of Mnps From Eucalyptusmentioning

confidence: 99%

“…It is worth noting that few studies have addressed pH despite its significant role in the process of MNP synthesis [ 156 ]. For example, the preparation of AgNPs from E. globulus [ 85 ] studied different values of pH (2.7, 7.0, 10.0), showing an effect on AgNP distribution size. A study by Liu et al [ 95 ] also reported the formation of FeNPs from Eucalyptus using different pH values (4,6,8) and, thus, achieved the optimum removal efficiency of hexavalent chromium from hydrous solution at pH 4.…”

Section: Synthesis Of Mnps From Eucalyptusmentioning

confidence: 99%

“…Pourmortazavi et al [ 88 ] found that increasing from 1 to 5 mmol/L of metal ion concentration showed a larger size of AgNPs, while enhancement of the concentration to 10 mmol/L achieved an opposite result. Pinto et al [ 85 ] observed that a very low concentration of Eucalyptus bark extraction plays a significant role in AuNP size in which the lower concentrations increase the particle size. Briefly, the addition of 50 mg/L of gold to E. globulus leaf extract and essential oil was investigated in the preparation of AuNPs [ 94 ].…”

Section: Synthesis Of Mnps From Eucalyptusmentioning

confidence: 99%

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Toward a Better Understanding of Metal Nanoparticles, a Novel Strategy from Eucalyptus Plants

Sawalha

Abiri

Sanusi

et al. 2021

Plants

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Nanotechnology is a promising tool that has opened the doors of improvement to the quality of human’s lives through its potential in numerous technological aspects. Green chemistry of nanoscale materials (1–100 nm) is as an effective and sustainable strategy to manufacture homogeneous nanoparticles (NPs) with unique properties, thus making the synthesis of green NPs, especially metal nanoparticles (MNPs), the scientist’s core theme. Researchers have tested different organisms to manufacture MNPs and the results of experiments confirmed that plants tend to be the ideal candidate amongst all entities and are suitable to synthesize a wide variety of MNPs. Natural and cultivated Eucalyptus forests are among woody plants used for landscape beautification and as forest products. The present review has been written to reflect the efficacious role of Eucalyptus in the synthesis of MNPs. To better understand this, the route of extracting MNPs from plants, in general, and Eucalyptus, in particular, are discussed. Furthermore, the crucial factors influencing the process of MNP synthesis from Eucalyptus as well as their characterization and recent applications are highlighted. Information gathered in this review is useful to build a basis for new prospective research ideas on how to exploit this woody species in the production of MNPs. Nevertheless, there is a necessity to feed the scientific field with further investigations on wider applications of Eucalyptus-derived MNPs.

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“…These molecules added with both electrostatic stability and reducing agents at the biochemistry synthesis [18,19]. Besides, the properties of AuNPs were determined according to some parameters like the forming time of the AuNPs, temperature, pH, the concentration of gold ions, [20,21] nature and morphology of Au structures [22]. The Than Xa Huong plant was named scientific Luvunga scandens (Roxb.)…”

Section: Introductionmentioning

confidence: 99%

Gold Nanoparticles from Ostruthin: Green Synthesis, a Stable Mechanism, Antitumor, and Antibacterial Activity

Minh¹,

Van²,

Minh³

et al. 2020

Rev. Chim.

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The Ostruthin was extracted and identified its structure from rhizomes of Luvunga scandens located at Ta Cu Mountain, Binh Thuan province, Vietnam for the first time. Gold nanoparticles (AuNPs) were synthesized by the green method. The AuNPs acted as antitumor against breast cancer cell line (MCF-7), human liver cancer cell line (HepG2), and Non-Small Cell Lung (NCI-H460). They showed the potential antitumor activity against MCF-7 with the IC50 value of 65.47�3.09 �M. The antitumor activity of the AuNPs was also compared with the extracted constituents from the root of Luvunga Scandens in a previous article. The AuNPs were exposed to high antitumor activity against MCF-7 and Hep G2, human cancer cell lines. The AuNPs have also been tested the antibacterial activity and shown the moderate antibacterial activity on both Salmonella enterica and Bacillus subtilis at a concentration of 0.25 mM.

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Demystifying the morphology and size control on the biosynthesis of gold nanoparticles using Eucalyptus globulus bark extract

Cited by 37 publications

References 49 publications

Synthesis of ultra-small gold nanoparticles by polyphenol extracted from Salvia officinalis and efficiency for catalytic reduction of p-nitrophenol and methylene blue

Synthesis of ultra-small gold nanoparticles by polyphenol extracted from Salvia officinalis and efficiency for catalytic reduction of p-nitrophenol and methylene blue

Toward a Better Understanding of Metal Nanoparticles, a Novel Strategy from Eucalyptus Plants

Gold Nanoparticles from Ostruthin: Green Synthesis, a Stable Mechanism, Antitumor, and Antibacterial Activity

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