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Metal Ni-loaded g-C3N4 for enhanced photocatalytic H2 evolution activity: the change in surface band bending.
- Source :
- Physical Chemistry Chemical Physics (PCCP); 11/28/2015, Vol. 17 Issue 44, p29899-29905, 7p
- Publication Year :
- 2015
-
Abstract
- A series of Ni@g-C<subscript>3</subscript>N<subscript>4</subscript> composites were synthesized by a simple solvent thermal method using melamine and acetylacetone nickel as precursors. The results of X-ray diffraction, transmission electron microscopy and high resolution transmission electron microscopy indicate that Ni was successfully loaded on g-C<subscript>3</subscript>N<subscript>4</subscript>. And the Ni loaded greatly enhances the photocatalytic H<subscript>2</subscript> evolution activity of g-C<subscript>3</subscript>N<subscript>4</subscript> compared to the pure g-C<subscript>3</subscript>N<subscript>4</subscript>. In order to study the role of Ni, the surface photovoltage, the surface photocurrent and photoluminescence measurements were used to investigate the photogenerated charge properties of g-C<subscript>3</subscript>N<subscript>4</subscript>. What is more, MottâSchottky plots and work function measurements confirmed the surface band bending change of g-C<subscript>3</subscript>N<subscript>4</subscript> contacting with Ni. Those results demonstrate that Ni coating deepens surface band bending of g-C<subscript>3</subscript>N<subscript>4</subscript>, resulting in higher separation efficiency of photogenerated charge carriers, which is contributed to the enhanced photocatalytic H<subscript>2</subscript> evolution activity. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14639076
- Volume :
- 17
- Issue :
- 44
- Database :
- Complementary Index
- Journal :
- Physical Chemistry Chemical Physics (PCCP)
- Publication Type :
- Academic Journal
- Accession number :
- 110768369
- Full Text :
- https://doi.org/10.1039/c5cp05158d