Effect of hydrolysis rate on the properties of TiO2-CNT nanocomposite powder prepared by sol-gel method
Authors
Abstract:
In this study, TiO2-10%wt. carbon nanotube (CNT) nanocomposite powders were synthesized by sol-gel method at various hydrolysis rate affected by different reaction agents of acetyl acetone and benzyl alcohol. Crystallization of TiO2 was then achieved through calcination at 400 °C. The properties of nanocomposite powder investigated by scanning electron microscopy, X-ray diffraction and diffuse reflectance spectroscopy. The results showed that, the crystalline TiO2 with anatase structure was produced after calcination. The crystallite size of TiO2 depended on the hydrolysis rate which was increased from 25 nm at higher hydrolysis rate by benzyl alcohol to 55 nm at slower hydrolysis rate by acetyl acetone. Before calcination, the results have shown that the slower hydrolysis rate yields relatively large particles with a plate like morphology in contrast to the presence of small particles with significant agglomeration at higher hydrolysis rate by benzyl alcohol. After calcination, high hydrolysis reaction through the use of benzyl alcohol offers easy access to the TiO2-10%wt. CNT nanocomposite with well controlled coating and desirable interactions between TiO2 and the CNTs. The thickness of TiO2 coating on CNTs in this way was 80 nm. Also, TiO2 particle size depended on the hydrolysis rate, decreased from 1 μm in presence of acetyl acetone to 150 nm in presence of benzyl alcohol. The band gap energy at higher hydrolysis rate by benzyl alcohol was 2.95 eV.
similar resources
Investigation of corrosion protection properties of TiO2-CdO nanocomposite coating prepared by sol-gel method on copper
the Sol–gel nanocomposite coatings have been investigated for copper metal as a potential replacement for the hazardous and banned hexavalent chromate conversion coatings. TiO2–CdO nanocomposite thin films were deposited on copper using the sol–gel method. The sol-gel coatings were prepared using a sol obtained by the hydrolysis and condensation of tetra-o-butyl titanate. They were doped with c...
full textCharacterization of Structural, Optical and Hydrophilicity properties of TiO2 Nano-Powder Synthesized by Sol-Gel Method
In this paper, titanium dioxide nano-particles were synthesized by sol-gel method in acidic atmosphere. The microstructure, morphology, optical band gap, and hydrophilicity of the sample were studied. Optical band gap of titanium dioxide was probed via Diffuse Reflectance Spectra (DRS) and contact angle (CA) was measured to investigate surface activity. XRD analysis was used to study crys...
full textAg-doped TiO2 Nanocomposite Prepared by Sol Gel Method: Photocatalytic Bactericidal Under Visible Light and Characterization
In this reaserch, photocatalyst titanium dioxide was doped with silver and modified by polyethylene glycol by sol gel method and the samples were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The purpose of the present study was to evaluate the photocatalytic bactericidal effects of prepared nanocomposite on human p...
full textThe effect of molar ratio on structural and magnetic properties of BaFe12O19 nanoparticles prepared by sol-gel auto-combustion method
Nanocrystalline particles of barium hexaferrite has been prepared by the sol–gel auto- combustion method using iron and barium nitrate with a Ba:Fe molar ratio of 1:10. The effect of fuel such as citric acid and aspartic acid was investigated on the structure and magnetic properties of nanoparticles. The results revealed that the formation of barium hexaferritefine particles is influenced by mo...
full textEffect of pH on the surface morphology and structural properties of TiO2 nanocrystals prepared by simple sol-gel method
Titanium dioxide nanocrystals were synthesized by sol-gel method at room temperature. Titanium isoprophoxide and absolute ethanol were used as precursors to prepare the sol. The pH of the solution was adjusted by adding nitric acid and sodium hydroxide solution. The prepared TiO2 nanocrystals were annealed at 325°C, 425°C and 525°C respectively. The effect of pH on the surface morphology and st...
full texteffect of ph on the surface morphology and structural properties of tio2 nanocrystals prepared by simple sol-gel method
titanium dioxide nanocrystals were synthesized by sol-gel method at room temperature. titanium isoprophoxide and absolute ethanol were used as precursors to prepare the sol. the ph of the solution was adjusted by adding nitric acid and sodium hydroxide solution. the prepared tio2 nanocrystals were annealed at 325°c, 425°c and 525°c respectively. the effect of ph on the surface morphology and st...
full textMy Resources
Journal title
volume 51 issue 1
pages 90- 95
publication date 2018-06-01
By following a journal you will be notified via email when a new issue of this journal is published.
Hosted on Doprax cloud platform doprax.com
copyright © 2015-2023