Journal of Nanomedicine & Nanotechnology

Polymer mediated synthesis of self assembled zinc-tin-oxide/acid functionalized nanodiamonds nanoparticles as potential photocatalysts

13^th International Conference on Nanotek & Expo

December 05-07, 2016 Phoenix, USA

Hameed Ullah, Uzma Malik

Hazara University, Pakistan

Posters & Accepted Abstracts: J Nanomed Nanotechnol

Abstract:

The multipurpose nanomaterial, Zinc Stannate (ZnSnO3), is one of the highly regarded photocatalysts. The photocatalytic functionality of ZnSnO3 is particularly dependent over its microstructure, morphology and bandgap. The conventional solid state methods are not suitable for its preparation owing to its metastability. Therefore, we come up with a strategically designed preparatory method to get control over the microstructure, morphology and optical bandgaps of ZnSnO3 nanomaterials. Single phase and self assembled ZnSnO3 nanoparticles having smaller bandgaps than the bulk are prepared and characterized. The metal ions were stabilized by in situ polymer formation, and the subsequent oxidation with NH4OH ensured ZnSnO3. The polymer was finally fired off at 400°C temperature which was established after TGA analysis of the metal oxide/polymer nanocomposites. The electron microscopic study shows that the ZnSnO3 nanoparticles self assemble around the polymers which agglomerated into spheres, may be due to the addition of aqueous solvent. The circularly self assembled structures further auto organized giving large assemblies of nanoparticles. The XRD analysis revealed that the self assembled nanoparticles are in a single phase i.e. perovskite ZnSnO3. The elemental compositions were established using EDX spectroscopy. The direct optical energy bandgaps were obtained for all the samples using DRS spectra. It has been observed that bandgaps of ZnSnO3 nanoparticles prepared at pH 3 are smaller than those obtained at pH 9. However, the overall bandgaps (2.66 â?? 3.25 eV) of ZnSnO3 nanoparticles were smaller than the bulk and earlier reported ZnSnO3 nanomaterials (3.35 â?? 3.89 eV) . The decrease in bandgaps was due to the addition of AFNDs as we have observed previously. Selective samples were used for photo-induced-degradation of Methylene blue dye, and it has been observed that more than 90% dye decomposed within two hours of exposure time.

Biography :

Email: hameedwazir@yahoo.co.uk