scanning electron microscopy Articles
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Preparation and characterisation of silver doped ZnO nanostructures
ZnO was prepared by hydrothermal method. The result of scanning electron microscopy showed that the materials had nanorod structures. Ag–doped ZnO was prepared by UV–photoreduction respectively. Crystalline phases and optical absorption of the prepared samples were determined by X–ray diffraction, Raman spectrum and UV–visible spectrophotometer. X–ray analyses reveals that Ag doped ZnO ...
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Electrospun substituted polyphenylene vinylene nanofibres
Biosensors are a rapidly growing research field, which is being swiftly advanced due to recent advances in nanotechnology. However most of the sensors developed are solution based, which limits their commercial use. Thus, with the view of developing bio–nanosensors based on solid–state photoluminescent nanofibres the electrospinning process was optimised for a novel PPV–derivative composite ...
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Effects of sublethal waterborne cadmium on gills in three teleosteans species: scanning electron microscope study
The effects of acute exposure for 96 h to a sublethal concentration of cadmium (300 µg L−1) on the surface gill morphology of the teleosteans Cyprinus carpio, Australoheros facetum and Astyanax fasciatus were studied using Scanning Electron Microscopy (SEM). The main cadmium-induced gill damages in the three species were: structural alterations, oedema and fusion of adjacent secondary lamellae; ...
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Very low energy scanning electron microscopy in nanotechnology
The group of low energy electron microscopy at ISI AS CR in Brno has developed a methodology for very low energy scanning electron microscopy at high image resolution by means of an immersion electrostatic lens (the cathode lens) inserted between the illumination column of a conventional scanning electron microscope and the sample. In this way the microscope resolution can be preserved down to a ...
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Stability and deactivation research of RuO2-PdO/Ti electrode in dye water degradation
RuO2-PdO/Ti electrode was prepared and used for the electro-catalytic degradation of Active Red K-2BP. It was found that the electrode was very stable in the process. A discoloration rate of 96.2% could still be achieved on the electrode after being used for 100 runs. X-ray photoelectron spectroscopy, X-ray diffraction, and scanning electron microscopy characterizations of the electrode ...
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Direct contact membrane distillation for nuclear desalination. Part I: Review of membranes used in membrane distillation and methods for their characterisation
Membrane distillation (MD) is a relatively novel membrane technology considered by the researchers as a potential method for seawater desalination. In the first issue of this journal, the possibility of nuclear desalination by MD was discussed comparing various MD configurations. The present paper firstly reviews the membranes used in MD and the methods of their characterisation, among them ...
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Study on fabrication and photoluminescence of SiC nanorods synthesised by carbothermal reduction
SiC nanorods were synthesised from SiO2 xerogel containing carbon nanoparticles at 1550°C in argon flow. The morphology and structure of the materials were determined by transmission electron microscopy, scanning electron microscopy, X-ray diffraction and Raman scattering methods. The static photoluminescence and time-resolved photoluminescence of SiC nanorods were examined under different ...
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Enhanced removal of soluble Cr(VI) by using zero-valent iron composite supported by surfactant-modified zeolites
Zero-valent iron (ZVI) was immobilized onto surfactant-modified zeolites (SMZ) using calcium alginate. Scanning electron microscopy showed that ZVI powder was uniformly immobilized on the surface of the SMZ. The added ZVI powder resulted in enhanced dichromate removal efficiency and the heterogeneous surface of the composite. The adsorption of dichromate onto the ZVI–SMZ composites ...
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Bi-amino surface functionalized polyoxometalate nanocomposite as an environmentally friendly catalyst: synthesis and dye degradation
In this paper, cobalt ferrite magnetic nanoparticle was modified by N-(2-aminoethyl)-3-(trimethoxysilyl) propyl amine. Polyoxometalate was immobilized on the modified bi-amino surface functionalized nanoparticle to prepare the environmentally friendly catalyst nanoparticle (EFCN). The synthesized EFCN was characterized using Fourier transform infrared, scanning electron microscopy and X-ray ...
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Synthesis of silicon carbide from rice husk
Mexican rice hulls were pyrolysed in an inert atmosphere to form silicon carbide. The first step was a preheating process; the next step was the synthesis of silicon carbide, by using an extremely simple system of heating. Scanning electron microscopy, X-ray diffraction and differential thermal analysis were used to characterize the product. The type of SiC obtained was the so-called b-silicon ...
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PBSA/layered silicate nanocomposites and the role of nanoclay on their electrospun fibrous structure
Polymer nanocomposites based on poly (butylene succinate-co-butylene adipate) (PBSA) with various concentrations of organically modified montmorillonite were fabricated by the solvent casting technique. The morphology of the prepared materials was investigated by X-ray diffraction (XRD) and their thermal behaviour was analysed by thermogravimetric analysis (TGA) and differential scanning ...
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Charge transport in hybrid solution processed heterojunction based on P3HT and ZnO from bilayer to blend
Ambipolar hybrid transistors were fabricated by using inorganic zinc oxide (ZnO) nanoparticles and an organic polymer, poly(3-hexylthiophene) (P3HT), as n - and p -type semiconductors, respectively. With well-adjusted ratio between n - and p -type, an ambipolar transport was observed in thin films based on either bilayer ZnO/P3HT or blend ZnO:P3HT architectures. Morphology of ...
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Preparation of TiO2-diatomite composites by ball-milling and its photocatalytic degradation of methyl orange
TiO2-diatomite composites were prepared using a two–stage ball-milling technique and they were subsequently characterized by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and FTIR, showing that nanotitania had been successfully supported on the surface of diatomite. The as-prepared TiO2–diatomite composites were used to decompose methyl orange (MO). Good degradation efficiency was ...
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Comparative in situ PET biodegradation assay using indigenously developed consortia
A soil burial test was carried out to evaluate the biodegradation of polyethylene terephthalate under natural environment for a period of six months in presence of three different indigenously developed bacterial consortia. These consortia comprised of potential polymer-degrading bacterial cultures isolated from various waste disposal sites. The comparative biodegradation of PET samples in ...
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Photocatalytic degradation of tartrazine dye using CuO straw-sheaf-like nanostructures
Straw-sheaf-like CuO nanostructures were fruitfully synthesized using a chemical precipitation approach for the photocatalytic degradation assessment of tartrazine. Phase identification, composition, and morphological outlook of prepared CuO nanostructures were established by X-ray diffraction and scanning electron microscopy analysis. The photocatalytic performance of the synthesized CuO ...
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Highly efficient removal of chromium(VI) from aqueous solution using polyaniline/sepiolite nanofibers
Polyaniline/sepiolite (PANI/sepiolite) nanofibers were prepared by in situ chemical oxidation polymerization in the presence of sepiolite. The effect of aniline/sepiolite weight ratio on the nanostructure of PANI/sepiolite composites was investigated by field-emission scanning electron microscopy. The adsorption of Cr(VI) onto the PANI/sepiolite nanofibers was highly dependent on pH values. The ...
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Study on the adsorption of bacteria in ceramsite and their synergetic effect on adsorption of heavy metals
In this paper, heavy metal adsorption by ceramsite with or without Bacillus subtilis (B. subtilis) immobilization was studied, and the synergetic effect of ceramsite and bacteria was discussed in detail. To investigate the roles of the micro-pore structure of ceramsite and bacteria in removing heavy metals, the amount of bacteria immobilized on the ceramsite was determined and the effect of pH ...
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Adsorption behavior of phosphate on anion-functionalized nanoporous polymer
An anion-functionalized nanoporous polymer was successfully prepared by quaternary ammonization and anion-exchange treatment method. The polymer was characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, N2 adsorption/desorption isotherms and thermogravimetric analysis. Batch experiments were conducted to investigate the adsorption behavior of phosphate on the ...
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Adsorptive removal of Rhodamine B from aqueous solution by nanoporous polydivinylbenzene
Nanoporous polydivinylbenzene (PDVB) material has been successfully prepared via the copolymerization of divinylbenzene monomers. The nanoporous PDVB was characterized through N2 adsorption/desorption isotherms, Fourier transform infrared spectroscopy, scanning electron microscopy, and thermogravimetric analysis. The nanoporous PDVB as an adsorbent was applied for the removal of Rhodamine B ...
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Change of surface and structure properties of cation exchange membrane in a microbial fuel cell
In this study, the two–chambered microbial fuel cell (MFC) was continuously long–term operated a young landfill leachate in order to evaluate the impact of cation exchange membrane (CEM) fouling on MFC performance. During the operation, the voltage output decreased sharply to almost zero and the voltage output was recovered completely after replacement of CEM, which implied that the voltage ...
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