Structural and Luminescence Properties of SnO۲ Nanostructures Via Porcine Gelatin-Assisted Synthesis

Porous nanostructured SnO۲ with a sheet-like morphology was synthesized through a simple green substrate-free gelatin-assisted calcination process using Tin tetracholoride pentahydrate as the SnO۲ precursor and porcine gelatin as the template. Crystalline phase, morphology, microstructure, and optical characteristics of the as-prepared material were also investigated at different calcination temperatures using X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), UV-visible absorption, and Photoluminescence spectroscopy (PL), respectively. XRD patterns of all the samples revealed the presence of a tetragonal crystalline structure with no other crystalline phases. Moreover, the synthesized hierarchical sheets assembled with nanoparticles displayed a large surface area and porous nanostructure. The calculated optical band gap energy varied from ۲.۶۲ to ۲.۸۷ eV depending on the calcination temperature. Finally, photoluminescence spectra indicated that the nanostructured SnO۲ could exhibit an intensive UV-violet luminescence emission at ۳۹۶ nm, with shoulders at ۳۷۴, violet emission peaks at ۴۰۵ and ۴۱۴ nm, blue-green emission peak at ۴۸۶ nm, green emission peak at ۵۳۴ nm and orange emission peak at ۶۲۸ nm.

کلیدواژه ها:

SnO۲ ، Porcine gelatin ، Sheet-like morphology ، Optical properties ، Photoluminescence. ، Gel drying