120174 20240319081013.0 doi 10.3390/ma15155266 sideral 131213 ART-2022-131213 eng Vargas-Urbano, Mónica A. Effect of Ethylene Glycol: Citric Acid Molar Ratio and pH on the Morphology, Vibrational, Optical and Electronic Properties of TiO2 and CuO Powders Synthesized by Pechini Method 2022 Access copy available to the general public Unrestricted High-purity TiO2 and CuO powders were synthesized by the Pechini method, an inexpensive and easy-to-implement procedure to synthetize metal oxides. The variables of synthesis were the ethylene glycol:citric acid molar ratio and the pH. High reproducibility of the anatase and tenorite phase was obtained for all synthesis routes. The degree of purity of the powders was confirmed by XRD, FTIR, UV-Vis absorption and XPS spectra. SEM and TEM images revealed the powders are composed of micrometer grains that can have a spherical shape (only in the TiO2) or formed by a non-compacted nanocrystalline conglomerate. FTIR spectra only displayed vibrational modes associating TiO2 and CuO with nanoparticle behavior. UV-Vis absorption spectra revealed the values of maximum absorbance percentage of both systems are reached in the ultraviolet region, with percentages above 83% throughout the entire visible light spectrum for the CuO system, a relevant result for solar cell applications. Finally, XPS experiments allow the observation of the valence bands and the calculation of the energy bands of all oxides. info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 3.4 2022 METALLURGY & METALLURGICAL ENGINEERING 20 / 79 = 0.253 2022 Q2 T1 PHYSICS, APPLIED 57 / 160 = 0.356 2022 Q2 T2 PHYSICS, CONDENSED MATTER 29 / 67 = 0.433 2022 Q2 T2 MATERIALS SCIENCE, MULTIDISCIPLINARY 174 / 343 = 0.507 2022 Q3 T2 CHEMISTRY, PHYSICAL 84 / 161 = 0.522 2022 Q3 T2 0.563 2022 Materials Science (miscellaneous) 2022 Q2 Condensed Matter Physics 2022 Q2 5.2 2022 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Marín, Lorena Castillo, Winny Mónica Rodríguez, Luis Alfredo Magén, César Universidad de Zaragoza (orcid)0000-0002-6761-6171 Manotas-Albor, Milton Diosa, Jesús Evelio Gross, Katherine 2003 395 Universidad de Zaragoza Dpto. Física Materia Condensa. Área Física Materia Condensada 15, 15 (2022), 5266 [16 pp.] Materials (Basel) Materials 1996-1944 6217064 http://zaguan.unizar.es/record/120174/files/texto_completo.pdf Versión publicada 2910283 http://zaguan.unizar.es/record/120174/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:120174 articulos driver 2024-03-18-15:21:37 ARTICLE