Preparation method of tungsten oxide and metallic tungsten nano-powders using degreased cotton
AbstractA simple method for producing nanopowders of tungsten oxides and metallic tungsten using degreasedcotton is proposed. Ammonium tungstate NH4W12O40 was used as a precursor. A medical cotton woolwas chosen for experiment. Structural characterizations of nanopowders were performed using X-raydiffraction (XRD) and Raman spectroscopy. Raman Spectra was obtained by NTegra Spectra (NT-MDT),where the light source is blue laser ̴ 473 nm. Analyses of XRD spectra showed that nanopowders have amonoclinic structure. The morphology of synthesized nanopowders was studied using scanning electronmicroscopy (SEM). The size of nanocrystals was estimated with Scherrer’s formula. The effect ofannealing temperature on nanoparticle sizes was investigated. The Raman spectra of the obtained sampleswere studied as a function of the synthesis temperature. In the Raman spectra, broading and red shift ofthe Raman bands with decreasing size are observed. The most pronounced Raman peaks are assigned tothe characteristic vibrations according to the available structural data.
How to Cite
MARHABAEVA, A.A. et al. Preparation method of tungsten oxide and metallic tungsten nano-powders using degreased cotton. Physical Sciences and Technology, [S.l.], v. 4, n. 2, p. 48-53, july 2018. ISSN 2409-6121. Available at: <http://phst.kaznu.kz/index.php/journal/article/view/133>. Date accessed: 16 jan. 2019. doi: https://doi.org/10.26577/phst-2017-2-133.
Nanomaterials and Nanotechnology
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