Transmission FTIR
measurements of PVA and PVA–ZnS nanocomposites were carried
out between 400 and 4000 cm–1 using Shimadzu FTIR
prestige 21 spectrometers through the KBr pellet method. The UV–vis
spectra and the absorbance of dye in solution were obtained on Shimadzu
UV-1800 spectrometer with the range of 200–800 nm. The crystalline
structure of the sample was determined from X-ray diffraction (XRD)
pattern using Cu Kα radiation (model-3040 X'pert PRO, Philips). The
luminescence characteristics were investigated by PL spectroscopy
at room temperature using on Shimadzu RF-3501pc spectrofluorometer.
The morphological investigation and elemental composition of the films
were attained through scanning electron microscopy images recorded
on a JEOL JSM 7600F FESEM equipped with an EDX. The sample preparation
was performed through platinum coating before the measurement. The
thermal properties were evaluated by TGA and DSC. TGA curves were
obtained by measuring 4.0 mg of a sample using a Shimadzu TGA-50 thermogravimetric
analyzer maintaining the heating temperature range between 30 and
850 °C at a rate of 20 °C min–1 under
N2 atmosphere. DSC measurements were carried out on a Shimadzu
TA-60A instrument, following heating and cooling rate at 10 °C
min–1 in the temperature range of 30–250
°C under nitrogen flow (20 mL/min).
measurements of PVA and PVA–ZnS nanocomposites were carried
out between 400 and 4000 cm–1 using Shimadzu FTIR
prestige 21 spectrometers through the KBr pellet method. The UV–vis
spectra and the absorbance of dye in solution were obtained on Shimadzu
UV-1800 spectrometer with the range of 200–800 nm. The crystalline
structure of the sample was determined from X-ray diffraction (XRD)
pattern using Cu Kα radiation (model-3040 X'pert PRO, Philips). The
luminescence characteristics were investigated by PL spectroscopy
at room temperature using on Shimadzu RF-3501pc spectrofluorometer.
The morphological investigation and elemental composition of the films
were attained through scanning electron microscopy images recorded
on a JEOL JSM 7600F FESEM equipped with an EDX. The sample preparation
was performed through platinum coating before the measurement. The
thermal properties were evaluated by TGA and DSC. TGA curves were
obtained by measuring 4.0 mg of a sample using a Shimadzu TGA-50 thermogravimetric
analyzer maintaining the heating temperature range between 30 and
850 °C at a rate of 20 °C min–1 under
N2 atmosphere. DSC measurements were carried out on a Shimadzu
TA-60A instrument, following heating and cooling rate at 10 °C
min–1 in the temperature range of 30–250
°C under nitrogen flow (20 mL/min).