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Structural, Magnetic, and Catalytic Properties of Mn-Doped Titania Nanoparticles Synthesized by a Sol-Gel Process.
- Source :
-
Journal of Cluster Science . Nov2018, Vol. 29 Issue 6, p1255-1267. 13p. - Publication Year :
- 2018
-
Abstract
- TiO2 nanoparticles (NPs) doped with different concentrations of manganese (1-8 at.%) were synthesized by sol-gel method and characterized to determine their structure, optical, and magnetic properties. X-ray diffraction analysis confirmed the formation of Mn-doped TiO2 NPs with anatase structure and that no impurity phases were present. X-ray photoelectron spectroscopic data indicated that the amount of Mn in the doped TiO2 samples was slightly lower than the theoretical value, and scanning electron microscope images illustrated a morphology consisting of un-aggregated, well-arranged NPs with a homogeneous size distribution. Particle sizes determined from transmission electron microscope images were found to be 17 and 11 nm for pure and Mn-doped TiO2, respectively. The band gap for pure TiO2 was calculated to be 3.26 eV from ultraviolet-visible reflectance spectra, which decreased to 2.70 eV following 8% Mn-doping. The as-prepared pure TiO2 NPs were found to be weakly paramagnetic at room temperature from vibrating sample magnetometer; however, a transformation from paramagnetic to weak ferromagnetism at room temperature was observed for Mn-doped TiO2 (5 at.%) NPs. Mn doped TiO2 (5 at.%) NPs exhibited the higher antibacterial activity against Bacillus subtilis, Escherichia coli and Pseudomonas aeruginosa than the pure TiO2 NPs. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10407278
- Volume :
- 29
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Journal of Cluster Science
- Publication Type :
- Academic Journal
- Accession number :
- 132160530
- Full Text :
- https://doi.org/10.1007/s10876-018-1437-8