In this study, in-situ and ex-situ hydrothermal synthesis procedures were applied to synthesize novelCMC/porous SnO2nanocomposites from rice husk extracted carboxymethyl cellulose (CMC) biopolymer.In addition, the effects of SnO2nanoparticles on thermal stability of the prepared nanocomposite werespecifically studied. Products were investigated in terms of morphology, particle size, chemical struc-ture, crystallinity and thermal stability by using field emission scanning electron microscopy (FESEM),transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffrac-tion (XRD) and thermogravimetric analysis (TGA), respectively. Presence of characteristic bands in theFTIR spectra of samples confirmed the successful formation of CMC and CMC/SnO2nanocomposites.In addition, FESEM images revealed four different morphologies of porous SnO2nanoparticles includ-ing nanospheres, microcubes, nanoflowers and olive-like nanoparticles with hollow cores which wereformed on CMC. These nanoparticles possessed d-spacing values of 3.35 Å. Thermal stability measure-ments revealed that introduction of SnO2nanoparticles in the structure of CMC enhanced stability ofCMC to 85%.
کلید واژگان :Carboxymethyl celluloseSnO2nanoparticlesIn-situEx-situHydrothermal methoda
ارزش ریالی : 600000 ریال
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