EFFECTS OF Zn-DOPING ON THE PHOTOCATALYTIC ACTIVITY AND MICROSTRUCTURES OF NANOCRYSTALLINE SnO2 POWDERS

Abstract

Abstract:In this study, undoped and Zn-doped SnO2 nanoparticles in different concentrations were synthesized by flame spray pyrolysis (FSP) technique. The produced particles were post-annealed after FSP process at 600 °C in order to obtain a crystalline structure. The structural analysis of the produced powders was performed by X-Ray Diffraction (XRD) methods. The surface morphology of the nanoparticles was identified using scanning electron microscopy (SEM). In addition, photocatalytic degradation of aqueous methylene blue (MB) solutions were evaluated using undoped and Zn-doped SnO2 nanoparticles under UV light illumination. Photocatalytic degradation of the MB solutions followed the pseudo-first-order-kinetics and the effect of the Zn doping amount on the photocatalytic reaction was investigated.

A Study of CeSnOx and Pd/CeSnOx as Low-Temperature NOx Adsorbers with Excellent Hydrothermal Stability

“…The diffraction peaks at 28.7, 33.2, 47.4, and 56.5°c orrespond to the fluorite structure of CeO 2 , and the diffraction peaks at 26.6 and 51.8°correspond to the tetragonal rutile phase of SnO 2 . 19,20 Moreover, the XRD patterns of CeSnO x showed no significant change after loading Pd. It is difficult to clarify the PdO by XRD, due to the overlap of PdO diffraction peak at ∼33.9°by peaks of CeO 2 .…”

Lanthanide Doped Near Infrared Active Upconversion Nanophosphors: Fundamental Concepts, Synthesis Strategies, and Technological Applications

“…host material UCNP synthesis. Flow chart for flaming synthesis of RE doped TiO 2 nanoscaled particles is displayed in Figure …”

“…Flow chart of synthesis of undoped‐ and RE‐ doped‐TiO 2 nanoparticles. Reproduced with permission . Copyright 2017, Elsevier Publishers.…”

Preparation and Photocatalytic Properties of Metal-Doped ZnO Nanofilms Grown on Graphene-Coated Flexible Substrates

“…Semiconductor photocatalysis is a green environmental protection technology with the ability to remove organic pollutants in the air and water, and it is an effective way to solve the energy and environmental crisis [1]. At present, metal oxides such as TiO 2 [2], SnO 2 [3] and ZnO [4] have been used by researchers around the world to remove various pollutants by photocatalytic methods. Among them, ZnO exhibits excellent photocatalytic activity under ultraviolet (UV) light irradiation, and its high exciton binding energy (60 meV) provides it with efficient exciton emission at room temperature, making it an attractive wide band gap (3.37 eV) semiconductor photocatalyst [5,6].…”