Microwave-assisted synthesis of silver nanoparticles from Origanum majorana and Citrus sinensis leaf and their antibacterial activity: a green chemistry approach

Singh, Darshan; Rawat, Deepti; Isha,

doi:10.1186/s40643-016-0090-z

Cited by 27 publications

(14 citation statements)

References 36 publications

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“…Some peaks of the ORE (e.g., the 1596 and 1041 cm −1 ) show a slight shift to lower wavenumbers in the case of Ag/ORE sample. This shift is in accordance with [ 36 ] and indicates possible successful interaction between the formed Ag NPs and some components of ORE.…”

Section: Resultssupporting

confidence: 91%

Plant-Mediated Synthesis of Silver Nanoparticles and Their Stabilization by Wet Stirred Media Milling

et al. 2017

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Within this study, a stable nanosuspension of silver nanoparticles (Ag NPs) was prepared using a two-step synthesis and stabilization approach. The Ag NPs were synthesized from a silver nitrate solution using the Origanum vulgare L. plant extract as the reducing agent. The formation of nanoparticles was finished upon 15 min, and subsequently, stabilization by polyvinylpyrrolidone (PVP) using wet stirred media milling was applied. UV-Vis spectra have shown a maximum at 445 nm, corresponding to the formation of spherical Ag NPs. Infrared spectroscopy was used to examine the interaction between Ag NPs and the capping agents. TEM study has shown the formation of Ag NPs with two different average sizes (38 ± 10 nm and 7 ± 3 nm) after the plant-mediated synthesis, both randomly distributed within the organic matrix. During milling in PVP, the clusters of Ag NPs were destroyed, the Ag NPs were fractionized and embedded in PVP. The nanosuspensions of PVP-capped Ag NPs were stable for more than 26 weeks, whereas for the non-stabilized nanosuspensions, only short-term stability for about 1 week was documented.

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Section: Resultssupporting

confidence: 91%

Plant-Mediated Synthesis of Silver Nanoparticles and Their Stabilization by Wet Stirred Media Milling

et al. 2017

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“…The existence of 1252 cm −1 peak in AgNPs FTIR spectrum represented the existence of C–N stretching vibration bond of aromatic amines 47 . The existence of peak at 1085 cm −1 in the FTIR spectrum indicated C–O–H stretching bond in primary and secondary alcohols 48 . The bands at 986 cm −1 and 864 cm −1 referring to the C–N and N–H stretching vibration bonds; respectively of primary amines suggesting the primary amine groups may involved in NPs synthesis 49 and could present in capping agents of synthesized NPs.…”

Section: Resultsmentioning

confidence: 97%

Phycobiliprotein-mediated synthesis of biogenic silver nanoparticles, characterization, in vitro and in vivo assessment of anticancer activities

El‐Naggar

Hussein

El-Sawah

2018

Sci Rep

102

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Phycoerythrin is the main phycobiliprotein that responsible for harvesting light for photosynthesis in cyanobacteria. In this research, phycoerythrin extracted from the cyanobacterium Nostoc carneum has been used to reduce silver nitrate for silver nanoparticles (AgNPs) biosynthesis. UV–visible spectrophotometry for measuring surface plasmon resonance showed a single absorption peak at 430 nm, which confirmed the presence of AgNPs. The face-centered central composite design was chosen to evaluate the interaction effects between four process variables and also to determine their optimal levels which influence the AgNPs biosynthesis using phycoerythrin. The maximum silver nanoparticles biosynthesis (1733.260 ± 21 µg/mL) was achieved in the central runs under the conditions of initial pH 10, incubation period of the 24 h, phycoerythrin concentration of the 0.8 mg/mL and 20 mM of AgNO3. The biosynthesized AgNPs were characterized using TEM which revealed the formation of spherical shape nanoparticles with size ranged between 7.1‒26.68 nm. EDX analysis confirmed silver as the major constituent element. FTIR spectrum indicates the presence of proteinaceous capping agent that prevents silver nanoparticles agglomeration. The IC50 of cell inhibition by AgNPs was observed at 13.07 ± 1.1 µg/mL. Treatment of mice bearing Ehrlich ascites carcinoma with 5 mg AgNPs/kg of mice body weight significantly decreased tumor volume, tumor cells count, white blood cells count and body weight. It was concluded that the phycoerythrin protein has the ability to synthesize AgNPs, which have antibacterial, antihemolytic, in vitro and in vivo cytotoxic activities.

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“…It has been demonstrated that the principal biomolecules present in plant extracts responsible for the reduction of metal ions to form NPs are proteins, polyphenols, vitamins and sugars, in particular L‐ascorbic acid, caffeic acid, gallic acid and quercetin . However, most synthesis methods utilizing these biomolecules require high temperatures such as the synthesis using starch and glucose as reducing agents at high temperature for 20 h or the synthesis using L‐ascorbic acid at 80 °C or they require microwave assistance . Moreover these methods are influenced by several variables which are difficult to control and can affect the method reproducibility .…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis and Characterization of Gold and Silver Nanoparticles and their Application for Development of a Third Generation Lactose Biosensor

et al. 2016

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[a] 1Introduction Nanotechnology is one of the most active areas of modernr esearch. New applications of nanoparticles (NPs) and nanomaterials are emerging rapidly.I nt he last decade metal nanoparticles (MNPs) have played an importantr ole in the development of biofuel cells,i on batteries and (bio)sensing devices [1][2][3][4] especially in the medical diagnostics field. MNPsa re commonly described as nanosized metals with dimensions within1 -100 nm with manyo pto-electronic properties such as larger surface area-volumer atio compared to their corresponding bulk material, large surface energies,p lasmonic excitation and quantum confinement [5].H istorically,g old, silver and copper MNPs were the most largely synthesized,b ecause of the particular properties of the noble metals, followed by iron oxide MNPsf or their magnetic properties [6][7][8].Thei ntegration of green chemistry principles to nanotechnology is one of the key issues of nanoscience research.G reen synthesis has become the way for asustainable and safe production of NPs and it has been proven to be an advantegeous methodd ue to its slower kinetics, easy manipulation and control over crystal growth for stabilization of NPs [9,10].Theuse of environmentally friendly materials,inparticular plant extracts,f ungi, bacteriaa nd enzymes,f or the synthesis of MNPs showed numerous benefits in pharmaceuticala nd other biomedical applications [11][12][13].G reen synthesis resulted also in being very cost effective and therefore can be used as ac heep suitable alternative for large-scale production of MNPs.Several approaches have been reported in the literature usinge xtracts from av ariety of differentp lant species in combination with av ariety of acids and metals alts.F or example aqueous extractso fFerocactuse chidne have been used to reduce silver nitrate (AgNO 3 )t of orm silver nanoparticles (AgNPs) within 6h.I th as been reported that both polyphenols and ascorbic acid present in aqueous Ferocactus echidne extractsc an easily reduce silver ions and can also act as capping agents to prevent the agglomeration of AgNPs [12].R ecently,g old nanoparticles (AuNPs) have been synthesized within 30 min by reducing sodium tetrachloroaurate (NaAuCl 4 )w ith extracts of Abstract:I nt his paper we report on af acile,c ost effective and environmental friendly green synthesis method of gold and silvern anoparticles (NPs) by using quercetin as reducing agent. Theo btained NPs were characterized by transmission electronm icroscopy (TEM), energyd ispersive spectroscopy (EDS), dynamicl ight scattering (DLS) and UV-Vis spectroscopy and parameters such as pH, ionic strength and temperature,e ffectively affecting shape and size of NPs,h ave been carefully studieda nd optimized.T he obtained results showed that the synthesized NPs were circular in shape with an average diameter of 5a nd 8nmf or the AuNPs and the AgNPs,r espectively.T he "green" NPs,s howing increased electroactive areas (A EA )a nd electronic transfer rate constants (k 0 ), were successively used to fabr...

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Microwave-assisted synthesis of silver nanoparticles from Origanum majorana and Citrus sinensis leaf and their antibacterial activity: a green chemistry approach

Cited by 27 publications

References 36 publications

Plant-Mediated Synthesis of Silver Nanoparticles and Their Stabilization by Wet Stirred Media Milling

Plant-Mediated Synthesis of Silver Nanoparticles and Their Stabilization by Wet Stirred Media Milling

Phycobiliprotein-mediated synthesis of biogenic silver nanoparticles, characterization, in vitro and in vivo assessment of anticancer activities

Green Synthesis and Characterization of Gold and Silver Nanoparticles and their Application for Development of a Third Generation Lactose Biosensor

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