Evaluation of the Structural, Photonic and Morphologic Effects Caused by Zinc Doping in the Titanium Dioxide Powder Samples Obtained by Sol-Gel Method
| Autor: | Joice Ferreira de Queiroz, Lincoln Carlos Silva de Oliveira, Aline S. Herrero, Marco Antonio Utrera Martines, Silvanice Aparecida Lopes dos Santos, Alberto Adriano Cavalheiro |
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| Rok vydání: | 2018 |
| Předmět: |
Anatase
Materials science business.industry Mechanical Engineering Doping chemistry.chemical_element 02 engineering and technology Zinc 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Chemical engineering chemistry Mechanics of Materials Titanium dioxide General Materials Science Photonics 0210 nano-technology business Sol-gel |
| Zdroj: | Materials Science Forum. 930:85-89 |
| ISSN: | 1662-9752 |
| DOI: | 10.4028/www.scientific.net/msf.930.85 |
| Popis: | The anatase phase of titanium dioxide ceramic material plays important rule in heterogeneous photocatalysis, beside the global phase amount and powder morphology. Some of structural parameters are useful to predict several properties, including the crystallization process and mechanism of the irreversible anatase-to-rutile phase transition. The photocatalytic process is based on charge transference from electron-hole pair to material surface, starting some redox reactions in aqueous media. The stable positive defects harm the recombination event and improve the final properties of that material. Modifiers with lower oxidation state than titanium (IV) is applicable for this purpose, what idea becomes the objective of this work. The Sol-Gel method was used to prepare bare and zinc doped-titanium dioxide powder samples reaching good compositional homogeneity for both samples calcined at 500 oC for 4 hours. Rietveld refinement carried out from raw x-ray diffraction patterns was used to demonstrate the formation of solid solution between zinc and titanium oxides. Besides that result, the determination of bandgap energy and SEM images corroborated the structural changes caused by zinc insertion in anatase phase and important difference in powder morphology was observed for zinc doped powder samples in order to reduce the agglomeration degree for better performance for heterogeneous photocatalysis applications. |
| Databáze: | OpenAIRE |
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