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Ultrathin hexagonal SnS2 nanosheets coupled with g-C3N4 nanosheets as 2D/2D heterojunction photocatalysts toward high photocatalytic activity.
- Source :
-
Applied Catalysis B: Environmental . Feb2015, Vol. 163, p298-305. 8p. - Publication Year :
- 2015
-
Abstract
- In this work, we present the 2D/2D type of heterojunction photocatalysts fabricated by horizontal loading ultrathin hexagonal SnS 2 nanosheets on g-C 3 N 4 nanosheets through a facile ultrasonic dispersion method. The sheet-like structures of these two nanomaterials induce a large contact region in the heterojunction interface, as evidenced by electron microscopic analyses. By taking advantage of this feature, the as-fabricated SnS 2 /g-C 3 N 4 heterojunction nanosheets exhibit considerable improvement on the photocatalytic activities for the degradation of organic dyes and phenols under visible light irradiation as compared to pure g-C 3 N 4 and SnS 2 nanosheets. In particular, the optimal heterojunction nanosheet with 5.0 wt.% SnS 2 shows the apparent rate constant of ∼0.2 min −1 for the RhB photodegradation, which is higher than that of pure g-C 3 N 4 and SnS 2 nanosheets by a factor of 4 and 8, respectively. Further studies by steady-state and transient photoluminescence spectroscopy indicate that the photosynergistic effect of SnS 2 /g-C 3 N 4 heterojunction can remarkably enhance the photoinduced interfacial charge transfer, thereby increasing the charge separation during the photocatalytic reaction. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09263373
- Volume :
- 163
- Database :
- Academic Search Index
- Journal :
- Applied Catalysis B: Environmental
- Publication Type :
- Academic Journal
- Accession number :
- 98553495
- Full Text :
- https://doi.org/10.1016/j.apcatb.2014.08.013