Synthesis, structural and optical properties of tin oxide nanoparticles and its CMC/PEG–PVA nanocomposite films
Autor: | R. S. Hafez, A.M. El Sayed, Noha H. El Fewaty |
---|---|
Rok vydání: | 2016 |
Předmět: |
Materials science
Nanocomposite integumentary system Polymers and Plastics Scanning electron microscope technology industry and agriculture Analytical chemistry macromolecular substances 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Tin oxide 01 natural sciences Optical conductivity 0104 chemical sciences Carboxymethyl cellulose Crystallinity Chemical engineering Materials Chemistry medicine Crystallite Fourier transform infrared spectroscopy 0210 nano-technology medicine.drug |
Zdroj: | Polymer Science Series A. 58:1004-1016 |
ISSN: | 1555-6107 0965-545X |
Popis: | Polyethylene glycol–polyvinyl alcohol (PEG–PVA) blend is a multifunctional material and controlling its properties is important for various medical and industrial uses. In this paper, we report the influence of carboxymethyl cellulose (CMC) and doping with tin oxide (SnO2) nanoparticles (NPs) on the structural and optical properties of PEG–PVA. The prepared samples were investigated by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HR-TEM), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) and UV–Vis-NIR spectroscopies. SnO2 NPs of rutile structure, average crystallite size of ∼30.2 nm and optical band gap (Eg) of 3.68 eV were prepared by a simple sol–gel process. CMC addition enhances the crystallinity of PEG–PVA that then gradually reduced by increasing SnO2 doping ratio. The optical transmittance of PEG–PVA increased from 77 to 90% after mixing with CMC and then decreased to 64% with increasing SnO2 content to 1.5%. Also, the Eg of PEG–PVA increased from 5.20 to 5.28 eV and then decreased to 4.88 eV due to CMC addition and SnO2 incorporation, respectively. The refractive index, the dispersion parameters and the optical conductivity of PEG–PVA, CMC/PEG–PVA and of its nanocomposite films are discussed. The correlation between the structural modifications and the resultant optical properties are reported. |
Databáze: | OpenAIRE |
Externí odkaz: |