Biogenic synthesis of silver nanoparticles mediated by Theobroma cacao extract: enhanced antibacterial and photocatalytic activities

Thatikayala, Dayakar; Jayarambabu, N.; Banothu, Venkanna; Ballipalli, Chandra Babu; Park, Jinsub; Rao, K. Venkateswara

doi:10.1007/s10854-019-02077-3

Cited by 27 publications

(9 citation statements)

References 50 publications

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“…Most significantly, the process can be appropriately elevated up for bulk production of NPs. Many plants such as Medicago polymorpha [25], Diospyros lotus [26], Lysimachia foenumgraecum [27], Convolvulus cneorum [28], Theobroma cacao [29], Duranta erecta [30], Olea ferruginea [31], Bridelia retusa [32], and Cucumis melo [33] have shown the potential of formation of AgNPs.…”

Section: Introductionmentioning

confidence: 99%

Characterizations and analysis of the antioxidant, antimicrobial, and dye reduction ability of green synthesized silver nanoparticles

Riaz

Ismail

Ahmad

et al. 2020

Green Processing and Synthesis

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The current study was conducted to assess the potential of ginger rhizome extract (Zingiber officinale) for the synthesis of silver nanoparticles (AgNPs) through the green method and its mitigating activity against pathogenic bacterial strains. AgNPs were synthesized through a simple one-step approach and characterized by UV-Visible (UV-Vis) spectroscopy, powder X-ray diffraction (PXRD), transmission electronic microscopy (TEM), and energy dispersive X-rays spectroscopy (EDS). PXRD and TEM results of AgNPs showed the face central cubic structures and predominantly spherical structures with a size of 6.5 nm. EDS analysis confirms the elemental silver in nanoparticles. Moreover, the impact of the pH, as well as temperature, during the synthesis of AgNPs has also been investigated. At 25°C and pH 5, there was no significant peak for AgNPs in the absorption spectra. However, with an increase in temperature from 25°C to 85°C and pH 5 to pH 11, particles started attaining the spherical shape of different sizes due to an increase in the reduction rate. The AgNPs displayed effective results against selected pathogenic strains, Pseudomonas aeruginosa (MTCC 424), Methicillin-resistant Staphylococcus aureus (ATCC 43300), and fungus Candida albicans (KACC 30003). The prepared AgNPs exhibited excellent antioxidant activity and catalytic reduction of methyl orange with the pseudo-first-order rate constant of 3.9 × 10−3.

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Section: Introductionmentioning

confidence: 99%

Characterizations and analysis of the antioxidant, antimicrobial, and dye reduction ability of green synthesized silver nanoparticles

Riaz

Ismail

Ahmad

et al. 2020

Green Processing and Synthesis

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“…2018), Theobroma cacao (Thatikayala et al . 2019), Aloe vera (Ahmadi et al . 2018) and Bridelia retusa (Vinayagam et al .…”

Section: Introductionmentioning

confidence: 99%

Inhibition of microbial growth by silver nanoparticles synthesized from Fraxinus xanthoxyloides leaf extract

Rafiq

Zahid

Qadir

et al. 2020

J. Appl. Microbiol.

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Aims Conventional antibiotics have been failed to treat infectious diseases due to emergence of multidrug resistance (MDR) in some common pathogens. The current study aimed to formulate new antimicrobials from greener sources. In the midst of these efforts, nanotechnology is a newly emerged field, in which the synthesis of new nanoparticles through novel and efficient means is on the rise. Methods and Results The current work has been carried out to assess the potential of Fraxinus xanthoxyloides (FX) leaf extract in biosynthesis of silver nanoparticles (FX‐AgNPs). This method is economical and simple one‐step approach to synthesize AgNPs. Characterization of FX‐AgNPs has been done by UV‐Visible spectroscopy, scanning electron microscope (SEM), X‐ray diffraction (XRD), transmission electronic microscope (TEM) and Fourier transforms infrared spectroscopy (FT–IR). The formation of FX‐AgNPs has confirmed through UV‐Visible spectroscopy (at 430 nm) by change of colour owing to surface Plasmon resonance. Based on the XRD pattern, the crystalline property of FX‐AgNPs has established. Functional groups existing in F. xanthoxyloides leaf extract are confirmed by FT‐IR spectrum. SEM and TEM authenticated morphology of the AgNPs. The newly synthesized nanoparticles were evaluated for their antimicrobial potential. Minimum inhibitory concentration was determined against Escherichia coli, methicillin‐resistant Staphylococcus aureus (MRSA) strains, Pseudomonas aeruginosa and Candida albicans by microtiter plate assay. The lowest inhibition (69%) observed against MRSA was at a concentration of 50 ppm FX‐AgNPs and maximum inhibition (81%) observed was against P. aeruginosa. The biosynthesized AgNPs triggered up to 68·6% reduction of the P. aeruginosa biofilm when compared to the control. Conclusion It can be concluded that nanoparticles could be a better alternative of antibiotics with greater efficacies and represent a valuable milestone to fight against infections caused by MDR pathogens. Significance and Impact of the Study This study imparts a useful insight into the development of a new antimicrobial agent from a novel source.

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“…The bands at 1568 cm 1 and 1288 cm 1 band appears at 1708 cm 1 corresponding to C=O bond formation 23 . This could be due to the oxidation of the OH group to the CO group 8 .…”

Section: Green Synthesis and Characterization Of Agnpsmentioning

confidence: 99%

Plant-extract-assisted green synthesis of silver nanoparticles using Macaranga Indica bark extract for antimicrobial and photocatalytic activity

Hegde¹,

Yallappa²,

Khadre³

et al. 2023

J. ISAS

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A rapid and environment-friendly green synthesis of silver nanoparticles (AgNPs) using Macaranga Indica (M. Indica) plant extracts was explored in this study. The obtained AgNPs were characterized by UV–Vis, XRD, FTIR, and SEM for antimicrobial and photocatalytic activities. The typical surface plasmon resonance peak around 440 nm confirmed the formation of AgNPs. The particles were found to be very tiny in the range of 15–20 nm size and showed fcc crystal symmetry. The FT-IR study showed the presence of bio-molecules on the surface of AgNPs and acting as capping agents. The in vitro antibacterial screen of AgNPs showed the bio-capped AgNPs have a higher inhibitory action for E. coli and S. aureus followed by C.albicans. The degradation property of the AgNPs towards Rhodamine B (RhB)under different conditions revealed that the degradation efficiency of phytochemicals-coatedAgNPs on RhB was found to be high and around 88.8% within 70 min

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Biogenic synthesis of silver nanoparticles mediated by Theobroma cacao extract: enhanced antibacterial and photocatalytic activities

Cited by 27 publications

References 50 publications

Characterizations and analysis of the antioxidant, antimicrobial, and dye reduction ability of green synthesized silver nanoparticles

Characterizations and analysis of the antioxidant, antimicrobial, and dye reduction ability of green synthesized silver nanoparticles

Inhibition of microbial growth by silver nanoparticles synthesized from Fraxinus xanthoxyloides leaf extract

Plant-extract-assisted green synthesis of silver nanoparticles using Macaranga Indica bark extract for antimicrobial and photocatalytic activity

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