The role of the molar ratio of (HNO3/Bi3+) on the formation and morphology of α-Bi2O3 microrods with photocatalytic properties
| Autor: | Monserrat Bizarro, Jesica Ramos, Agileo Hernández-Gordillo, Larisa Enríquez Vázquez, Sandra E. Rodil |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Diffuse reflectance infrared fourier transform Precipitation (chemistry) Scanning electron microscope Mechanical Engineering 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences law.invention chemistry.chemical_compound chemistry Indigo carmine Mechanics of Materials Nitric acid law Photocatalysis General Materials Science Calcination 0210 nano-technology Photodegradation Nuclear chemistry |
| Zdroj: | Materials Science in Semiconductor Processing. 86:93-100 |
| ISSN: | 1369-8001 |
| DOI: | 10.1016/j.mssp.2018.06.024 |
| Popis: | Enlarged microrods α-Bi2O3 were directly obtained by chemical precipitation method at soft reflux conditions using ethylenediamine-solvent as precipitating and morphological template, in absence or presence of nitric acid. The influence of the molar ratio of HNO3/Bi3+ (0, 5 and 10) and reflux temperature, maintaining fixed the Bi3+ content in solution, on the formation of Bi2O3 or amorphous-compounds was investigated. The structure and properties of the α-Bi2O3 obtained by the direct precipitation condition or after calcination were obtained by X-ray diffraction, infrared analysis, diffuse reflectance spectroscopy and scanning electron microscopy. A relationship between the reflux temperature and the molar ratio of HNO3/Bi3+ ions for the direct formation of α-Bi2O3 phase is discussed. The photocatalytic properties, recyclability and stability of α-Bi2O3 solids were tested in the photodegradation of indigo carmine dye under UV-Light. X-ray diffraction and infrared analysis of the re-used α-Bi2O3 were also included. |
| Databáze: | OpenAIRE |
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