Investigations on effect of some metal ion dopants on structural optical and photocatalytic activity of SnO2 WO3 ZnO nanoparticles

Abstract

Materials with an average grain size in nanometer range exhibit the properties which are greatly different form their bulk counterpart, as a result of which scientists and researchers are motivated to develop and study novel material in this range. A nanometer is one billionth of a meter, or 10-9m.Nanomaterials are usually defined as particles, whether they are, crystals, rods, sphere, that are typically between 1-100 nm in size at least in one dimension. Nano science and nanotechnology includes the synthesis, characterization and exploitation of nanostructured materials. . In the past newlinetwo decades, the area of material science plays a vital role with nanomaterials and their novel applications. Hence this research work focused on the harvesting of applications using the interdisciplinary fields such as chemistry, material science, optics and biology with the Nano science. It is essential to synthesize, characterize and manipulate the nanostructures. The main objective of the present Ph.D. thesis is based upon the one of the greatest environmental problem, caused by continuous discharge of non-biodegradable organic dyes from textile dyeing industries. The dyes are toxic chemical substance having complex structure and resistance to degradation. The development of new treatment process can solve environmental pollution by industrial waste water. The heterogeneous photocatalysis is a favorable method with promising applications in the photo degradation of different organic substance present in industrial waste water. In the recent years most of the nanostructured materials have been widely used as photocatalyst for the degradation of organic dyes. Nanostructured metal oxide powders have the ability to effectively degrade pollutants. Nanostructured oxide powders are innovative materials obtained by new newlinesynthesis processes. newline newline newline