Nitrogen-doped TiO2/Graphene Composites Synthesized via the Vapour-thermal Method
TiO 2 /graphene composite was synthesized in the vapor environment of isopropanol. In order to improve the properties of composite, N-doped of TiO 2 /graphene with different N/Ti molar ratio was prepared in the vapor environment of deionized water and used urea as the source of nitrogen. The N-doped...
Gespeichert in:
Veröffentlicht in: | Journal of Wuhan University of Technology. Materials science edition 2022-12, Vol.37 (6), p.1105-1113 |
---|---|
Hauptverfasser: | , , , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | TiO
2
/graphene composite was synthesized in the vapor environment of isopropanol. In order to improve the properties of composite, N-doped of TiO
2
/graphene with different N/Ti molar ratio was prepared in the vapor environment of deionized water and used urea as the source of nitrogen. The N-doped occupies in the interstitial sites of TiO
2
lattice, substitutes for O element in TiO
2
and for C element in graphene, and simultaneously changes the chemical states of Ti and O elements in TiO
2
. N-doped changes the morphology of TiO
2
from nano-sheets to nanoparticles, accompanying with the decrease in specific surface area of the composites, first increases the particle size of TiO
2
and then decreases, and alters the vibration modes of Ti-O-Ti. The composite with
R
N/Ti
=2 exhibits the enhanced photocatalytic degradation performance to methylene blue, and the degradation rate increases from 7.7×10
−2
min
−1
for the undoped composite to 9.6×10
−2
min
−1
. |
---|---|
ISSN: | 1000-2413 1993-0437 |
DOI: | 10.1007/s11595-022-2640-x |