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Graphitic carbon nitride nanosheets decorated with TiO2 mesocrystals for visible-light photodegradation of rhodamine B.
- Source :
- Journal of Materials Science: Materials in Electronics; Apr2021, Vol. 32 Issue 7, p8687-8702, 16p
- Publication Year :
- 2021
-
Abstract
- TiO<subscript>2</subscript> mesocrystals (M-TiO<subscript>2</subscript>) can promote the adsorption of organic pollutants and provide effective conduction pathways for the photogenerated charge carriers. However, the pristine M-TiO<subscript>2</subscript> had no visible-light absorption due to its wide band gap. In this paper, the hollow-box-structured mesoscopic TiO<subscript>2</subscript>/g-C<subscript>3</subscript>N<subscript>4</subscript> (M-T-CN) composites with visible-light response were prepared by liquid phase deposition (LPD) and topological transformation. The results showed that the sample of M-T-CN-300 can degrade 99.1% Rhodamine B (RhB) solution within 15 min under illumination. The reaction rate constant of M-T-CN-300 was nearly 3 times and 34 times that of pristine g-C<subscript>3</subscript>N<subscript>4</subscript> and M-TiO<subscript>2</subscript>, respectively. Photoluminescence (PL) analysis confirmed that the coupling of M-TiO<subscript>2</subscript> and g-C<subscript>3</subscript>N<subscript>4</subscript> can reduce the recombination of photogenerated charge carriers. The enhanced photocatalytic performance in M-T-CN composite material was mainly attributed to the synergistic effect of M-TiO<subscript>2</subscript> and g-C<subscript>3</subscript>N<subscript>4</subscript>, which can effectively promote the separation of charge carriers and achieve the visible-light absorption. [ABSTRACT FROM AUTHOR]
- Subjects :
- RHODAMINE B
NANOSTRUCTURED materials
NITRIDES
CHARGE carriers
TITANIUM dioxide
Subjects
Details
- Language :
- English
- ISSN :
- 09574522
- Volume :
- 32
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- Journal of Materials Science: Materials in Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 149906361
- Full Text :
- https://doi.org/10.1007/s10854-021-05540-2