Effect of polyethylene glycol and propyltrimethoxysilane on structural and optical properties of zinc oxide nanoparticles synthesized by sol–gel process

AbstractZinc oxide nanoparticles (ZnO NPs) are prepared by sol–gel process, using both polyethylene glycol (PEG-۴۰۰) as surfactant and propyltrimethoxysilane (PTMS) as capping agent. Surface modification is performed in situ procedure. The physical parameters such as strain and stress values are calculated via the Williamson–Hall plot (W&H) assuming a uniform deformation model (UDM) and uniform stress deformation model, and by the size and strain plot method (SSP). The results show that the crystallite size estimated from Scherrer’s formula, (W&H), (UDM), (SSP) and the particle size estimated from DSL are inter-correlated, which confirm the small size and the isotropic nature of our ZnO NPs. The FTIR spectroscopy illustrates that PEG-۴۰۰ and PTMS could be adsorbed at the ZnO NPs surface. The distinct emission peak in the blue band is located at ۴۹۰ nm and E۲ (high) mode is situated at ۴۳۶ cm−۱. Both results confirm the oxygen deficiency in the ZnO NPs.

کلیدواژه ها:

Sol–gel synthesis ، Zinc Oxide ، PEG ، ۴۰۰ ، Propyltrimethoxysilane ، Nanoparticles ، DRX