S-doped rutile has been prepared for the first time by hydrothermal reaction of TiS 2 in hydrochloric acid at a low temperature (180°C), with the S atoms in three states of Ti-S-Ti, Ti-S-O and SO 4 . TiS 2 in nitric acid can also be transformed into TiO 2 , but with mixed phases of anatase and rutile, containing nitrogen atoms at interstitial sites in the form of Ti-O-N or Ti-N-O. The S-TiO 2 catalyst shows a better visible-light reactivity toward adsorbed methylene blue (MB) photodegradation and hydroxylation of terephthalic acid with respect to the N-TiO 2 . The possible reasons leading to the high photoactivity of the S-TiO 2 are discussed in terms of the incorporated sulfur states.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Physics and Astronomy(all)
- Surfaces and Interfaces
- Surfaces, Coatings and Films