2.6. Characterization of Co/Mo-LDH
The essential structural and morphological characteristics of the parent Co Mo-LDH was
examined by different tools analysis. The x-ray diffraction pattern of the Co Mo LDH was
recorded by Brucker AXS-D8 Advance XRD instrument (Germany) with nickel-filtered
copper radiation (λ =1.5405Å) at scanning speed of 0.4 degree/ min. The oxidation state of
the adsorbent was measured by X-ray photoelectron spectroscope XPS model K-alpha
(England). The elemental analysis, with respect to Co and Mo, for the freshly prepared
material and the spend LDH after the adsorption was obtained using XRF model Pw1390
(Philips, Germany). The IR spectrums were acquired by Ft-IR instrumentation; ATI Mattson
Genesis series Model 960 M009 with KBr disc method. The N2 adsorption-desorption
isotherm was performed with Quantachrome Nova 3200 instrument (USA). The surface area
and total pore volume were calculated throughout the BET plot and BJH equation
respectively. The structure changes of the Co Mo LDH as a result of the thermal treatment
were studied by thermo-gravimetric analysis (TGA) and differential scanning calorimetry
(DSC) apparatus model SDT-Q600 V20.5 Pouild 15 (USA). The surface morphology was
obtained by scanning electron microscope (SEM) model JEOL 5300 SEM (Japan). The
SSE i q qcalc
N
6
concentrations of the lead ions were measured with atomic absorption spectrometer (AAS)
model Zeenit 700 Panalytikajena (Germany).