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All spectrophotometric measurements were performed using a JASCO (V-630 UV-VIS Spectrophotometer, Japan). The pH measurements were carried out with a Jenway 3510, UK pH-meter. SEM analysis was carried out using JEOL model JSM-6510LV, USA. FT-IR spectra were recorded using KBr disc by a JASCO FTIR-410 spectrometer in the 4000-400 cm-1 spectral range. The XRD patterns were recorded by X-ray diffractometer (D8-Brucker Model) using anode Material Cu K? radiation (?=1.5406 Å) at a generator voltage and current of 40 kV and 40 mA, respectively. The sample was scanned using Bragg’s configuration in the 2? range of 4.01-79.99° and step size (2?) was 0.02° with a scan step time of 0.7 s. BET surface area of [email protected] was characterized by N2 adsorption/desorption isotherms at -196 ? C using a NOVA 3200, USA apparatus. Thermal gravimetric analysis (TGA), differential thermal analysis (DTA) and differential scanning coulomtry analysis (DSC) were carried out using simultaneous DSC-TGA device model (SDTQ 600, USA) under N2 atmosphere with a heating rate of 10 °C/min from 29 to 1000 °C. The bulk conductivity was measured using Keithley, 6517B electrometer-high resistance Meter.

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