Structural, morphological, and optical study of titania-based nanopowders suitable for photocatalytic applications

19th International School on Condensed Matter Physics: Advances in Nanostructured Condensed Matter: Research and Innovations

Šepanovi, M.^1 ; Gruji-Brojin, M.^1 ; Abramovi, B.^2 ; Golubovi, A.^1

Center for Solid State Physics and New Materials, Institute of Physics, University of Belgrade, Pregrevica 118, Belgrade

11080, Serbia^1

Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Trg D. Obradovia 3, Novi Sad

21000, Serbia^2

关键词: Hydrothermal routes;    Microscopic methods;    Optical and electronic properties;    Photocatalytic activities;    Photocatalytic application;    Photocatalytic property;    Raman Scattering measurements;    Synthesis conditions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/794/1/012003/pdf
DOI  :  10.1088/1742-6596/794/1/012003

来源: IOP

【 摘 要 】

Systematic investigation of the relationship between structural, morphological, optical and photocatalytic properties of the titania-based nanopowders is presented. A series of pure and doped titania catalysts with various (anatase and brookite) phase compositions have been prepared by sol-gel or hydrothermal route. The crystal structure and composition of the synthesized samples have been extensively characterised by XRD and Raman scattering measurements. The nanopowder morphology has been studied using microscopic methods (SEM, AFM, and STM), whereas the porous structure has been revealed by the analysis of nitrogen sorption data. The optical and electronic properties have been studied by spectroscopic ellipsometry. All investigated properties have been correlated to photocatalytic activity, tested in degradation of the pharmaceutically active substances (such as metoprolol and alprazolam) induced by UVA or visible radiation. Based on this correlation, the physical properties which contribute most to the increase in photocatalytic activity of synthesized nanopowders have been determined, in order to optimize the synthesis conditions which could lead to the maximal efficiency in degradation of particular pollutant.