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- Title
A simple sol–gel hydrothermal method for the synthesis of defective TiO2 nanocrystals with excellent visible-light photocatalytic activity.
- Authors
Xi, Junting; Zhang, Yiping; Chen, Xing; Hu, Ying
- Abstract
Defective TiO2 nanocrystals (D-TiO2) were synthesized by a simple, mild and green sol–gel hydrothermal method. The as-prepared sample possesses a high specific surface area of 173.6 m2/g and high crystallinity of anatase phase without any calcination. Raman, EPR and XPS spectrum confirmed the existence of oxygen vacancies in D-TiO2. These oxygen vacancies provide D-TiO2 with visible-light photocatalytic activity, as demonstrated by the degradation of Rhodamine B (RhB). The degradation pathway of RhB over D-TiO2 was investigated, and the possible photocatalytic mechanism was also proposed. The excellent photocatalytic property of D-TiO2 was mainly attributed to the synergistic effect between the high surface area and abundant oxygen vacancies. This work presents a new route to synthesize high-performance visible-light-responsive TiO2 photocatalyst.
- Subjects
NANOCRYSTALS; RHODAMINE B; SURFACE area; CRYSTALLINITY
- Publication
Research on Chemical Intermediates, 2020, Vol 46, Issue 4, p2205
- ISSN
0922-6168
- Publication type
Article
- DOI
10.1007/s11164-020-04087-x