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- W2023895970 abstract "Abstract In this paper, the influence of calcination parameters on the synthesis of N:TiO 2 catalysts obtained through the polymeric precursors method was evaluated. The powders were prepared by annealing Ti 4+ precursor resins at different temperature-time conditions in air, resulting in powders with different degrees of crystallinity for N doping, which was done by adding urea to the as-prepared powders and calcining in N 2 atmosphere. The N doping process resulted in band gap narrowing of TiO 2 and, varying annealing temperature and time, can be an alternative method for preferential formation of substitutional N or interstitial N. It was found that the percentage of interstitial N increased with an increase in annealing temperature, resulting in the complete absence of substitutional N at 400 °C. The photocatalytic performance of the powders was evaluated using Rhodamine-B and Atrazine solutions under ultraviolet and visible irradiations. The coefficients revealed that interstitial N had a positive correlation to both ultraviolet and visible photoactivity. In contrast, substitutional N showed a negative correlation. Further, the ratio of substitutional N to interstitial N indicated a strong negative correlation to ultraviolet light photoactivity and no correlation to visible light photoactivity. However, substitutional N should be controlled for better photocatalytic properties." @default.
- W2023895970 created "2016-06-24" @default.
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- W2023895970 date "2014-07-01" @default.
- W2023895970 modified "2023-09-30" @default.
- W2023895970 title "Influence of calcination parameters on the synthesis of N-doped TiO2 by the polymeric precursors method" @default.
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- W2023895970 doi "https://doi.org/10.1016/j.jssc.2014.03.044" @default.
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