Найдено научных статей и публикаций: 2, для научной тематики: FTIR
1.
K. R. Vishnu Mahesh, H. N.Narasimha Murthy, B.E. Kumara Swamy, M. Krishna, and B.S. Sherigara
- Front. Chem. China , 2011
The Sodium Montmorillonite (Na-MMT) is not susceptible to polymer due to its organophilic character and low basal spacing. The primary objective of this study was to improve Na-MMT platelets separation by organically modifying it with cation and anion exchanges using Cetyl trimethyl ammonium bromide...
The Sodium Montmorillonite (Na-MMT) is not susceptible to polymer due to its organophilic character and low basal spacing. The primary objective of this study was to improve Na-MMT platelets separation by organically modifying it with cation and anion exchanges using Cetyl trimethyl ammonium bromide (CTAB) and Sodium dodecyl sulfate (SDS) respectively.
Basal spacing, presence of functional groups, Zetapotential
with particle size analysis and thermal
stability of the Organomodified Na-MMT (OMMT)
were characterized using XRD, FTIR, zeta-potential
analyzer and TGA respectively. The basal spacing of
CTAB modified OMMTincreased to 19.5 Å from 11.0 Å
which corresponds to the basal spacing of Na-MMT.
The SDS modified OMMT did not show any increase in
the basal spacing. FTIR spectra of CTAB modified Na-
MMT illustrated the attachment of CTAB functional
groups to Na-MMT, while the same was absent in the
case of SDS modified Na-MMT. The zeta-potential of
Na-MMT shifted from – 24.88 mV to 15.66 mV in the
case of CTAB modified Na-MMTand 12.49 mV for SDS
modified Na-MMT, indicating a greater surface potential of the modified nanoclay. The TGA showed greater weight loss for CTAB modified Na-MMT than that for Na-MMT, indicating the effective Na+ ion exchange with alkyl amines.
2.
S. Bellucci, A.I. Popov, C. Balasubramanian, G. Cinque, A. Marcelli, I. Karbovnyk, V. Savchyn, N. Krutyak
- Radiation Measurements, 2007, vol. 42, pp. 708-711. , 2007
The paper reports comparative studies on synthesized aluminium nitride nanotubes, nanoparticles and commercially available micron-sized AlN powder using different spectroscopic techniques: cathodoluminescence measurements (CL), X-ray absorption near edge spectroscopy (XANES) and Fourier-transform in...
The paper reports comparative studies on synthesized aluminium nitride nanotubes, nanoparticles and commercially available micron-sized AlN powder using different spectroscopic techniques: cathodoluminescence measurements (CL), X-ray absorption near edge spectroscopy (XANES) and Fourier-transform infrared spectroscopy (FTIR). Crucial distinctions in CL spectra are observed for nano- and microsized aluminium nitride powders; systematic shift of the IR absorption maximum has been detected for nanostructured aluminium nitride as compared to commercial samples. Through XANES experiments on Al K-edge structural differences between nano- and bulk AlN are revealed, intensity of features in absorption spectra has been found to be a function of wurtzite and zincblend phases amount in nanostructured samples.
Radiation Measurements, 2007, vol.42, pp. 708-711.