Band gap narrowing and photocatalytic studies of Nd3+ ion-doped SnO2 nanoparticles using solar energy
| Autor: | S. Balachandran, K. Rajendra Babu, Dhanya Chandran, M. Deepa, Lakshmi S. Nair |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Band gap Doping Analytical chemistry chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Tin oxide 01 natural sciences Neodymium law.invention chemistry Mechanics of Materials law 0103 physical sciences Photocatalysis General Materials Science Calcination 0210 nano-technology Absorption (electromagnetic radiation) Spectroscopy |
| Zdroj: | Bulletin of Materials Science. 39:27-33 |
| ISSN: | 0973-7669 0250-4707 |
| DOI: | 10.1007/s12034-015-1142-2 |
| Popis: | Pure and Nd3+-doped tin oxide (SnO2) nanoparticles have been prepared by the sol–gel method and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution TEM, energy-dispersive spectroscopy and UV–visible spectroscopy. The XRD patterns of all the samples are identified as tetragonal rutile-type SnO2 phase which is further confirmed by TEM analysis. Neodymium doping introduces band gap narrowing in the prepared samples and enhances their absorption towards the visible-light region. The photocatalytic activity of all the samples was evaluated by monitoring the degradation of methylene blue solution under day light illumination and it was found that the photocatalytic activity significantly increases for the samples calcined at 600 than 400°C, which is due to the effective charge separation of photogenerated electron–hole pairs. The efficiency of photocatalysts was found to be related to neodymium doping percentage and calcination temperature. |
| Databáze: | OpenAIRE |
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