Instruments used
X-ray powder diffraction is done using Philips PW 1050/70 with
Cu Ka radiation with a Ni filter. Scanning electron micrographs are
taken on JEOL (JSM-840A) scanning electron microscopy. Transmission
Electron Microscopy (TEM) analysis was performed on a
Hitachi H-8100 (accelerating voltage up to 200 kV, LaB6 filament)
equipped with EDS (Kevex Sigma TMQuasar, USA). The FTIR spectroscopic
studies have been carried out on a Perkin Elmer spectrometer
(Spectrum 1000) with KBr pellets. The excitation and
emission spectra are measured at room temperature on a SHIMADZU
make Spectrofluorophotometer RF-5301 PC equipped with a
xenon discharge lamp as an excitation source. The optical absorption
spectra of the samples are carried out using ELICO SL 159 UV–
Vis spectrophotometer.