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The Impact of nitrogen doping variations on the effectiveness of TiO₂ as a photocatalyst for methylene blue degradation
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Abstract
TiO₂-N, with nitrogen sourced from urea, was successfully synthesized using the sonication method. Variations in the mass ratio of urea in TiO₂-N (8:2, 6:4, 4:6, 2:8) were conducted to determine their effects on structural properties, functional groups, morphology, bandgap energy, and the most effective photocatalytic properties of the samples. XRD analysis results showed that all samples exhibited an anatase phase and had a tetragonal structure. The crystallite sizes of TiO₂ and TiO₂-N (8:2, 6:4, 4:6, and 2:8) were 50.73 nm, 51.91 nm, 51.55 nm, 51.88 nm, and 51.15 nm, respectively. FTIR results indicated that all samples contained Ti-O-Ti and Ti-N-Ti bonds. SEM results revealed the morphology of TiO₂ and TiO₂-N. UV-Vis DRS results showed that TiO₂-N had a smaller bandgap energy compared to TiO₂. Photocatalytic activity tests of the TiO₂-N samples showed that TiO₂-N (6:4) was the most effective in degrading methylene blue under both UV light and daylight.
Title: The Impact of nitrogen doping variations on the effectiveness of TiO₂ as a photocatalyst for methylene blue degradation
Description:
Abstract
TiO₂-N, with nitrogen sourced from urea, was successfully synthesized using the sonication method.
Variations in the mass ratio of urea in TiO₂-N (8:2, 6:4, 4:6, 2:8) were conducted to determine their effects on structural properties, functional groups, morphology, bandgap energy, and the most effective photocatalytic properties of the samples.
XRD analysis results showed that all samples exhibited an anatase phase and had a tetragonal structure.
The crystallite sizes of TiO₂ and TiO₂-N (8:2, 6:4, 4:6, and 2:8) were 50.
73 nm, 51.
91 nm, 51.
55 nm, 51.
88 nm, and 51.
15 nm, respectively.
FTIR results indicated that all samples contained Ti-O-Ti and Ti-N-Ti bonds.
SEM results revealed the morphology of TiO₂ and TiO₂-N.
UV-Vis DRS results showed that TiO₂-N had a smaller bandgap energy compared to TiO₂.
Photocatalytic activity tests of the TiO₂-N samples showed that TiO₂-N (6:4) was the most effective in degrading methylene blue under both UV light and daylight.
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