Physico-Chemical Properties of Carboxymethyl Cellulose (CMC)/Nanosized Titanium Oxide (TiO2) Gamma Irradiated Composite

In this work, TiO2 nanoparticles were prepared by sol-gel method with or without a stabilizer as such as carboxy methylcellulose (CMC). TiO2 nanoparticles was used to prepare CMC/TiO2 composite. In addition, the prepared CMC/TiO2 composites were irradiated by a dose from 10-30 kGy of gamma irradiation. The properties of the prepared CMC/TiO2 composites were characterized by X-ray diffraction (XRD), transmutation electron microscopy (TEM), thermal gravimetric analysis TGA and UV. The obtained data indicated that the stabilizer (CMC) has a significant effect on the particle size distribution. Values of optical energy band gap Eg decreased from 3 eV for CMC to 2.88 eV for CMC with TiO2 whereas these values were decreased to 2.77 by gamma irradiation at a dose of 30 kGy. In addition, thermal gravimetric analysis (TGA) indicated that the thermal stability properties of CMC were increased by the addition of TiO2 and gamma irradiation.