Abstract
Nickel titanate (NiTiO3) nanopowders have been synthesized using the sol–gel method. The effect of annealing temperatures on the structural, optical, and visible-light photocatalytic properties of the synthesized NiTiO3 nanopowders was investigated. The nanopowders annealed at a low temperature (500–600°C) showed a mixture of NiO, anatase, rutile, and NiTiO3. The TiO2 and NiO phases decreased with increased calcination temperature and transformed to NiTiO3 phase at a temperature higher than 600°C. The particle size of the prepared samples substantially increased with increased annealing temperature. The reduction of the optical band gap from 2.46 eV to 2.31 eV corresponded to the increase in annealing temperature from 500°C to 900°C, respectively. The NiTiO3 nanopowders annealed at 500°C exhibited high efficiency in the photodegradation of congo red dye under visible light irradiation.
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This research is funded by Vietnam National Foundation for Science and Technology Development (NAFOSTED) under Grant Number 103.02-2015.25.
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Hung, P.P., Dat, T.T., Dung, D.D. et al. Effect of Annealing Temperature on Structural, Optical and Visible-Light Photocatalytic Properties of NiTiO3 Nanopowders. J. Electron. Mater. 47, 7301–7308 (2018). https://doi.org/10.1007/s11664-018-6668-9
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DOI: https://doi.org/10.1007/s11664-018-6668-9