Self-assembly of nanoparticles to form tree-like tellurium nanostructures using novel starting reagents

Panahi-Kalamuei, Mokhtar; Mousavi‐Kamazani, Mehdi; Salavati‐Niasari, Masoud

doi:10.1016/j.matlet.2014.08.069

Cited by 28 publications

(16 citation statements)

References 10 publications

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“…Beside, the physicochemical approaches, such as, microwave-assisted synthesis, hydrothermal, and electrodeposition methods (12) developed for the production of the nanostructures, the biosynthesis of NPs has been introduced as a safe, clean, non-toxic, and environmental-friendly methods (13,14). Some microorganisms such as Rhodobacter capsulatus (15), Acinetobacter haemolyticus (5), and Bacillus selenitireducens (16) have excellent capability in converting metalloid ions like tellurium into nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Antimicrobial and Antioxidant Activity of the Biologically Synthesized Tellurium Nanorods; A Preliminary In vitro Study

Shakibaie

Adeli-Sardou

Mohammadi-Khorsand

et al. 2017

Iran. J. Biotechnol.

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Background: Recent theranostic (therapeutic or diagnostic) applications of tellurium nanoparticles have attracted a great interest for development of diff erent methods for synthesis of this valuable nanostructure, especially via biological resources. Objectives: In the present study, the antimicrobial and antioxidant eff ects of the tellurium nanorods (Te NRs) biosynthesized by a bacterial strain Pseudomonas pseudoalcaligenes strain Te were evaluated. Materials and Methods:The antimicrobial eff ect of Te NRs and potassium tellurite against diff erent bacterial and fungal pathogens was assessed by microdilution method. Furthermore, the disk diff usion method was used to evaluate the antibacterial eff ect of the biogenic Te NRs and potassium tellurite against methicillin-resistant Staphylococcus aureus, alone or in combination with various antibiotics. Also, the biogenic Te NRs were investigated for antioxidant activity using 2, 2-diphenyl-1-picrylhydrazyl (DPPH) scavenging activity and reducing power assay. Results: Transmission electron micrograph (TEM) of the purifi ed Te NRs showed individual and rod-shaped nanostructure (~22 nm diameter by 185 nm in length). Based on the data obtained from both microdilution and disk diff usion method the K 2 TeO 3 exhibited a higher antibacterial and antifungal activity compared to the Te NRs. The measured IC 50 for the biogenic Te NRs (i.e. DPPH radical scavenging activity) was found to be 24.9 μg.mL -1 , while, K 2 TeO 3 has represented only 17.6 ± 0.8 % DPPH radical scavenging eff ect at the concentration of 160 μg.mL -1 . The reducing power assay revealed a higher electron-donating activity for Te NRs compared to K 2 TeO 3 . Conclusions: Based on the data obtained from both microdilution and disk diff usion method the K 2 TeO 3 exhibited a higher antimicrobial and antifungal activity than Te NRs. Te NRs didn't show the antibacterial eff ect against the tested bacterial strain: MRSA and showed an inhibitory eff ect and antibacterial activity of the eff ective antibiotics. However, more studies should be performed to explore the action mechanism of the produced biogenic Te NRs.

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Section: Introductionmentioning

confidence: 99%

Antimicrobial and Antioxidant Activity of the Biologically Synthesized Tellurium Nanorods; A Preliminary In vitro Study

Shakibaie

Adeli-Sardou

Mohammadi-Khorsand

et al. 2017

Iran. J. Biotechnol.

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“…It is generally accepted that photocatalytic activity depends mainly on the diffusion of reactants and products, and therefore the favorable distribution of the pore. It seems that the very well photocatalytic activity of the as-prepared nanocrystalline barium stannate can be due to the favorable distribution of the pore, high hydroxyl amount and high separation rate of the charge carriers [27,[31][32][33][34][35][36] (Fig. 9b).…”

Section: Resultsmentioning

confidence: 99%

Nanocrystalline barium stannate: facile morphology-controlled preparation, characterization and investigation of optical and photocatalytic properties

Moshtaghi

Zinatloo-Ajabshir

Salavati‐Niasari

2015

J Mater Sci: Mater Electron

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Pure cubic nanocrystalline barium stannate was synthesized by new simple coprecipitation strategies that employed tin (II) chloride and [bis(salicylaldehydato) barium (II)] as tin and barium sources in presence of tetramethylethylenediamine (TMED) as a novel precipitating agent. This work is the first successful attempt for the preparation of nanostructured barium stannate by utilizing TMED via a facile coprecipitation way in presence of tin (II) chloride and [bis(salicylaldehydato) barium (II)]. The structural, optical and morphological characteristics of the as-prepared nanostructured barium stannate were studied by UV-vis diffuse reflectance spectroscopy, transmission electron microscopy, X-ray diffraction, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy and energy dispersive X-ray microanalysis (EDX). According to the SEM results, it was found that shape and size of the barium stannate can be dramatically controlled by setting critical preparation factors such as the barium source, precipitating agent type, reaction pH, surfactant type and dosage of surfactant. The photocatalytic characteristics of as-obtained nanocrystalline barium stannate were also examined by degradation of erythrosine dye as water contaminant.

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“…It is generally accepted that the heterogeneous photocatalytic processes comprise diffusion, adsorption and reaction steps, and suitable distribution of the pore is effective and useful to diffusion of reactants and products, which prefer the photocatalytic reaction. In this investigation, the very well photocatalytic activity can be related to appropriate distribution of the pore, high hydroxyl amount and high separation rate of charge carriers [28][29][30][31][32][33][34][35]. For preparing the nanostructured materials via thermal treatment way, the choice of precursor plays a significant role.…”

Section: Photocatalytic Properties Of Pr 6 O 11mentioning

confidence: 99%

Preparation of nanocrystalline praseodymium oxide with different shapes via a simple thermal decomposition route

Zinatloo-Ajabshir

Salavati‐Niasari

Hamadanian

2015

J Mater Sci: Mater Electron

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Present report describes the surfactant-free synthesis and characterization of nanocrystalline praseodymium oxide. For this purpose, praseodymium source ([PrL(NO 3 ) 2 ]NO 3 (L = (N,N 0 -bis(2 0 -hydroxyacetophenonimine)-o-dipropylene triamin) was prepared and its thermal decomposition was performed in at various temperatures in the 300-800°C. Results of this investigation demonstrate that praseodymium oxide with very uniform sphere-like shape, small grain size and pure cubic phase could be synthesized by thermal decomposition of the obtained praseodymium source at 600°C. FESEM, FT-IR, TGA, XRD, TEM, EDX, PL and UV-Vis were applied to study the formation of as-prepared nanoparticles and their structure, shape, elemental composition and optical characteristics. Moreover, the photocatalytic characteristics of as-synthesized praseodymium oxide were examined by photodegradation of b-naphthol under UV light illumination.

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Self-assembly of nanoparticles to form tree-like tellurium nanostructures using novel starting reagents

Cited by 28 publications

References 10 publications

Antimicrobial and Antioxidant Activity of the Biologically Synthesized Tellurium Nanorods; A Preliminary In vitro Study

Antimicrobial and Antioxidant Activity of the Biologically Synthesized Tellurium Nanorods; A Preliminary In vitro Study

Nanocrystalline barium stannate: facile morphology-controlled preparation, characterization and investigation of optical and photocatalytic properties

Preparation of nanocrystalline praseodymium oxide with different shapes via a simple thermal decomposition route

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