Fungus-mediated biosynthesis of silica and titania particles

Bansal, Vipul; Rautaray, Debabrata; Bharde, Atul; Ahire, Keda; Sanyal, Ambarish; Ahmad, Absar; Sastry, Murali

doi:10.1039/b503008k

Cited by 371 publications

(152 citation statements)

References 34 publications

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“…This is in good agreement with binding energy values previously reported in the literature for elemental selenium (see Tables S1 and S2 The signal of C 1s can be fitted into three components with binding energies located at 284.8, 286.3 and 288.1 eV, corresponding to hydrocarbon chains (C x H y ), alpha-carbon (α-C) + C-N, and carboxylic acid (COOH groups), respectively [35,36]. The N 1s peak is centered at 400.1 eV and lays in the range corresponding to nitrogen containing groups (such as amine or amide groups) [17,36,37].…”

Section: Xps Analysissupporting

confidence: 91%

Adsorption of zinc by biogenic elemental selenium nanoparticles

Jain

Jordan

Schild

et al. 2015

Chemical Engineering Journal

130

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The adsorption of Zn 2+ ions onto biogenic elemental selenium nanoparticles (BioSeNPs) was investigated. BioSeNPs were produced by reduction of selenite (SeO 3 2− ) in the presence of anaerobic granules from a full scale upflow anaerobic sludge blanket (UASB) reactor treating paper mill wastewater. The BioSeNPs have an iso-electric point at pH 3.8 at 5 mM background electrolyte concentration. X-ray photoelectron spectroscopy showed the presence of a layer of extracellular polymeric substances on the surface of BioSeNPs providing colloidal stability. Batch adsorption experiments showed that the uptake of Zn 2+ ions by BioSeNPs was fast and occurred at a pH as low as 3.9. The maximum adsorption capacity observed was 60 mg of zinc adsorbed per g of BioSeNPs. The Zn 2+ ions adsorption on the BioSeNPs was largely unaffected by the presence of Na + and Mg 2+ , but was impacted by the presence of Ca 2+ and Fe 2+ ions.

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Section: Xps Analysissupporting

confidence: 91%

Adsorption of zinc by biogenic elemental selenium nanoparticles

Jain

Jordan

Schild

et al. 2015

Chemical Engineering Journal

130

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“…Absorbance was taken in UV-spectrometer in different time intervals with both the isolates in the particular wavelengths where they have shown higher activity in silver nanoparticles and ZnO nanoparticles production. Both the graphs showed an increase in absorbance in various time intervals (0, 6,12,18,24,30,36,42, and 48 hrs) (Figs. 7 and 8).…”

Section: Uv-spectrometer Analysis Of Silver and Zno Nanoparticlesmentioning

confidence: 95%

“…There are reports of using different groups of microorganisms such as yeast, bacteria, fungi, and actinomycetes for the synthesis of nanoparticles. A few examples include, Aspergillus fumigatus (Ag nanoparticle), Pseudomonas aeruginosa (Au nanoparticle), Candida glabrata (cadmium nanoparticle), and Fusarium oxysporum (silver, gold, and zirconia nanoparticles) [9][10][11][12]. Nanoparticles synthesized biologically are multifunctional with diverse applications in biomedical field such as in therapeutics [13], tissue regeneration [14], drug delivery systems [15], separation techniques [16], and cancer therapy.…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis and Characterization of Marine Yeast-Mediated Silver and Zinc Oxide Nanoparticles and Assessment of Their Antioxidant Activity

Aswathy

Gabylis

et al. 2017

Asian J Pharm Clin Res

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Objective: The present study focuses on the synthesis of silver and zinc oxide (ZnO) nanoparticles from marine yeasts, isolated from the sediments of the Bay of Bengal, Bakkhali coast, West Bengal, and India. Methods:The marine sediment samples were diluted through serial diution and cultured onto yeast malt agar medium by the spread plate method. The selected yeast isolates were screened for the biosynthesis of silver and ZnO nanoparticles. Characterization of both the nanoparticles was done by applying ultraviolet (UV)-visible spectroscopy, atomic force microscopy, scanning electron microscopy, and Fourier transform infrared spectroscopy.Results: A total of five marine yeasts isolates were able to synthesize silver and ZnO nanoparticles as evidence of the color change. Optical density was measured in UV-spectrometer at different time interval for the conformation of production of nanoparticles. The size of silver nanoparticle was 31.78 nm and ZnO nanoparticle was 86.27 nm. The synthesized nanoparticles are then used for antioxidant assays. Conclusions:We are concluding that marine yeast isolates SAG1 and SAG2 both are potential marine yeast isolates which can synthesize both the silver and ZnO nanoparticles. They also showed good antioxidant activity.

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“…Consequently, a reduction, hydrolysis or chelation process leads to the formation of metal, metal oxide or metal sulfide nanoparticles. 3 However, microorganisms adopted for nanoparticle synthesis have not gained considerable attention because of the inhomogeneity of the resulting particle sizes and shapes as well as concerns associated with scale-up of the nanoparticle synthesis process for practical use. 4 Many reactions that run in parallel might cross-react in the micro-sized reaction vessels of the organisms, which leads to inhomogeneity in nanoparticle synthesis.…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, the upregulation of specific proteins causes other functional proteins to remain in a less active state, and control of the reactant supply could have a role in controlling the nucleation and growth of metal nanoparticles. 3,[5][6][7] These strategies facilitate the formation of nanoparticles of homogeneous sizes and shapes. A study using microfluidics showed promising results for potential scale-up.…”

Section: Introductionmentioning

confidence: 99%

Nanoparticle biosynthesis using unicellular and subcellular supports

2015

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Modern life is becoming increasingly sophisticated because of products engineered using designs inspired by nature. Fifty years ago, the burdock plant motivated Swiss scientists to invent Velcro, which was a simple but widely applied design that is still considered the greatest biomimetic invention yet. In nanotechnology, interest in biosynthesis of nanoparticles is increasing, particularly in the use of unicellular and subcellular supports. However, the polydispersity of the resultant structure, limited opportunity for product control and commercial applications of biosynthesized nanoparticles remain as challenges. Using different approaches, studies have attempted to understand nanoparticle biosynthesis and control of particle size and uniformity. In the biotechnological approach, gene sequences that were identified in one organism via gene silencing and were critical for nanoparticle synthesis were introduced and expressed in a different organism or overexpressed by promoters in the same organism to enhance productivity. In contrast, physical and chemical approaches were used for the control of nanoparticle synthesis. To provide a comprehensive understanding of nanoparticle biosynthesis using unicellular and subcellular supports, this review discusses recent studies and experimental evidence in the following categories: synthesis of metal, quantum dot, magnetic and bacterial protein nanoparticles.

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Fungus-mediated biosynthesis of silica and titania particles

Cited by 371 publications

References 34 publications

Adsorption of zinc by biogenic elemental selenium nanoparticles

Adsorption of zinc by biogenic elemental selenium nanoparticles

Green Synthesis and Characterization of Marine Yeast-Mediated Silver and Zinc Oxide Nanoparticles and Assessment of Their Antioxidant Activity

Nanoparticle biosynthesis using unicellular and subcellular supports

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