A bio-inspired strategy for the synthesis of zinc oxide nanoparticles (ZnO NPs) using the cell extract of cyanobacterium <i>Nostoc</i> sp. EA03: from biological function to toxicity evaluation

Ebadi, Mojgan; Zolfaghari, Mohammad Reza; Aghaei, Seyyed Soheil; Zargar, Mohsen; Shafiei, Morvarid; Zahiri, Hossein Shahbani; Noghabi, Kambiz Akbari

doi:10.1039/c9ra03962g

Cited by 89 publications

(52 citation statements)

References 42 publications

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“…In the present study, antibacterial properties of the ZnO NCs are slightly different to those described in previous reports related to nano-ZnO biological synthesis. According to [ 74 ], ZnO NPs produced by cyanobacterium Nostoc sp. [ 7 ] showed MIC values for S. aureus and E. coli of 64 μg/mL and 2000 μg/mL, respectively.…”

Section: Resultsmentioning

confidence: 99%

Zinc Oxide Nanocomposites—Extracellular Synthesis, Physicochemical Characterization and Antibacterial Potential

et al. 2020

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This research presents, for the first time, the potential of the Lactobacillus paracasei LC20 isolated from sweet whey as a novel, effective and accessible source for post-cultured ZnO nanocomposites synthesis. The obtained nanocomposites were subjected to comprehensive characterization by a broad spectrum of instrumental techniques. Results of spectroscopic and microscopic analysis confirmed the hexagonal crystalline structure of ZnO in the nanometer size. The dispersion stability of the obtained nanocomposites was determined based on the zeta potential (ZP) measurements—the average ZP value was found to be −29.15 ± 1.05 mV in the 7–9 pH range. The ZnO nanocomposites (NCs) demonstrated thermal stability up to 130 °C based on the results of thermogravimetric TGA/DTG) analysis. The organic deposit on the nanoparticle surface was recorded by spectroscopic analysis in the infrared range (FT-IR). Results of the spectrometric study exhibited nanostructure-assisted laser desorption/ionization effects and also pointed out the presence of organic deposits and, what is more, allowed us to identify the specific amino acids and peptides present on the ZnO NCs surfaces. In this context, mass spectrometry (MS) data confirmed the nano-ZnO formation mechanism. Moreover, fluorescence data showed an increase in fluorescence signal in the presence of nanocomposites designed for potential use as, e.g., biosensors. Despite ZnO NCs’ luminescent properties, they can also act as promising antiseptic agents against clinically relevant pathogens. Therefore, a pilot study on the antibacterial activity of biologically synthesized ZnO NCs was carried out against four strains (Escherichia coli, Staphylococcus aureus, Klebsiella pneumoniae and Pseudomonas aeruginosa) by using MIC (minimal inhibitory concentration). Additionally, the colony forming units (CFU) assay was performed and quantified for all bacterial cells as the percentage of viable cells in comparison to a control sample (untreated culture) The nanocomposites were effective among three pathogens with MIC values in the range of 86.25–172.5 μg/mL and showed potential as a new type of, e.g., medical path or ointment formulation.

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Section: Resultsmentioning

confidence: 99%

Zinc Oxide Nanocomposites—Extracellular Synthesis, Physicochemical Characterization and Antibacterial Potential

et al. 2020

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“…The aquatic forms mostly occur in fresh water and few are marine. 99 Cyanobacteria contain nonmembrane-bound organelles including chloroplasts, unstacked thylakoids, phycobiliprotein pigments, and cyanophycean starch and peptidoglycan matrices or walls. In addition, they are a rich source of biomolecules such as proteins, enzymes, antioxidants, vitamins, and polysaccharides.…”

Section: Cyanobacteria As Biomachinery For Nps Synthesismentioning

confidence: 99%

“…20 Different studies have demonstrated the capacity of different cyanobacterial strains to form different types of NPs, including metallic NPs such as Ag-NPs and Au-NPs, and metal oxide NPs such as ZnO NPs and CuO NPs, as well as other nanomaterials such as Ag-Au nanoalloys and semiconductor NPs such as CdS NPs ( Figure 6). 2,63,99,100 Silver Nanoparticles (Ag-NPs)…”

Section: Cyanobacteria As Biomachinery For Nps Synthesismentioning

confidence: 99%

<p>Cyanobacteria – A Promising Platform in Green Nanotechnology: A Review on Nanoparticles Fabrication and Their Prospective Applications</p>

Hamida

Ali

Redhwan

et al. 2020

IJN

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Green synthesis of nanoparticles (NPs) is a global ecofriendly method to develop and produce nanomaterials with unique biological, physical, and chemical properties. Recently, attention has shifted toward biological synthesis, owing to the disadvantages of physical and chemical synthesis, which include toxic yields, time and energy consumption, and high cost. Many natural sources are used in green fabrication processes, including yeasts, plants, fungi, actinomycetes, algae, and cyanobacteria. Cyanobacteria are among the most beneficial natural candidates used in the biosynthesis of NPs, due to their ability to accumulate heavy metals from their environment. They also contain a variety of bioactive compounds, such as pigments and enzymes, that may act as reducing and stabilizing agents. Cyanobacteria-mediated NPs have potential antibacterial, antifungal, antialgal, anticancer, and photocatalytic activities. The present review paper highlights the characteristics and applications in various fields of NPs produced by cyanobacteria-mediated synthesis.

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“…The characteristic absorption bands of metal oxides are generally observed below 1000 cm −1 , in their fingerprint region, arising from inter-atomic vibrations of metal and O ions. The peaks at 1641, 705 and 530 cm −1 correspond to Zn-O deformational vibrations [40]. The slight variation in the FT-IR peak position is attributed to changes in the crystallinity, surface purity, particle shapes and sizes.…”

Section: Ftir Analysis Of Znrsmentioning

confidence: 97%

Photo-assisted mineralisation of titan yellow dye using ZnO nanorods synthesised via environmental benign route

Vidya¹,

Manjunatha

Sudeep³

et al. 2020

SN Appl. Sci.

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Green synthesis of metal oxide nanoparticles using plant extract is a most promising substitute for regular methods that involve chemical synthesis approach. The present study reports the synthesis of ZnO nano rods (ZNRs) using Calotropis gigantea, a plant rich in flavonoids and alkaloids and their application as a photocatalyst in the degradation of titan yellow dye. The synthesized ZNRs were characterized using XRD, FESEM-EDS and HRTEM-SAED. The XRD results confirm the formation of wurtzite ZnO. The FESEM images confirmed that ZNRs have length ranging from 20 to 200 nm, diameter ranging between 20 and 80 nm and width between 20 and 50 nm. The bio-synthesized ZNRs were used for photo-degradation of titan yellow dye, one of the main effluents from textile industries, discharged directly into water bodies. The ZNRs exhibited 95% dye degradation for 10 ppm TY dye concentration in the presence of 60 mg of the ZNRs catalyst at pH 8 for 60 min UV irradiation. The present study reports eco-friendly method for the synthesis of ZNRs and its efficiency as a photo catalyst in the advanced photo assisted oxidation process for degradation of titan yellow dye.

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A bio-inspired strategy for the synthesis of zinc oxide nanoparticles (ZnO NPs) using the cell extract of cyanobacterium Nostoc sp. EA03: from biological function to toxicity evaluation

Cited by 89 publications

References 42 publications

Zinc Oxide Nanocomposites—Extracellular Synthesis, Physicochemical Characterization and Antibacterial Potential

Zinc Oxide Nanocomposites—Extracellular Synthesis, Physicochemical Characterization and Antibacterial Potential

<p>Cyanobacteria – A Promising Platform in Green Nanotechnology: A Review on Nanoparticles Fabrication and Their Prospective Applications</p>

Photo-assisted mineralisation of titan yellow dye using ZnO nanorods synthesised via environmental benign route

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